Bugging device detection device, bugging device detection method, and bugging device detection program

Abstract

To reliably detect presence and a location of a radio wave transmitter.SOLUTION: A space for detection is imaged by a visible light video camera 10 that includes an image sensor 14 having light receiving sensitivity with respect to wavelengths of visible light components, and a radio wave video camera 30 that includes an image sensor 34 having light receiving sensitivity with respect to wavelengths of radio waves transmitted by eavesdropping devices. Moreover, visible light moving image data captured by the visible light video camera 10 and each piece of monochromatic radio wave moving image data obtained by converting radio wave moving image data captured by the radio wave video camera 30 into monochrome are synthesized and output. The radio wave video camera 30 is arranged at a substantially same position and angle as the visible light video camera 10. Thus, it is possible to reliably detect whether and where eavesdropping devices are installed.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a bugging device detection device, a bugging device detection method, and a bugging device detection program for detecting a bugging device that is an electromagnetic wave transmitter. [Background technology]

[0002] Japanese Patent Laid-Open Publication No. 2001-7771 (Patent Document 1) describes a radio wave transmitter detection device that includes a single-shot signal generator that generates a single-shot signal, a receiving and demodulating circuit that receives and demodulates radio waves transmitted from a radio wave transmitter such as a eavesdropping device based on the reception of the single-shot signal transmitted from the single-shot signal generator, a delay time detector that detects the delay time from when the single-shot signal generator generates the single-shot signal to when the receiving and demodulating circuit receives and outputs radio waves corresponding to the single-shot signal, and a timing generator that changes the timing until the next single-shot signal is generated according to the detected delay time.

[0003] This device operates so that the period of the single-shot signal becomes longer when moving away from a radio wave transmitter such as a bugging device, and becomes shorter when approaching the device, so that the location of a radio wave transmitter such as a bugging device can be reliably found with a simple circuit configuration. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2001-7771 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in recent years, there have been some bugging devices and other radio wave transmitters that do not transmit radio waves corresponding to a voice containing a single signal at the timing when the voice containing the single signal is received, but transmit radio waves corresponding to the voice at a timing different from the timing when the voice containing the single signal is received, that is, at random timing. Since it is unclear at what timing the radio waves will be transmitted in such bugging devices, the radio wave transmitter detection device described in the above publication cannot cope with such bugging devices, and there is still room for improvement in terms of detection performance.

[0006] Therefore, in one aspect, the present invention has an object to provide a technique that can reliably detect the presence and location of an electromagnetic wave transmitter. [Means for solving the problem]

[0007] In order to solve the above problems, the electromagnetic wave transmitter detection device of the present invention may be an electromagnetic wave transmitter detection device that detects an electromagnetic wave transmitter, and may include a housing, at least one first camera having a first imaging element having a light receiving sensitivity to wavelengths of visible light components and arranged on the housing, at least one second camera having a second imaging element having a light receiving sensitivity set to match the frequency of the electromagnetic waves emitted by the electromagnetic wave transmitter and arranged on the housing so as to have a camera position and camera angle approximately equal to those of the first camera, an image conversion unit capable of converting a second image captured by the second camera into a monochrome third image, an image synthesis unit that generates a synthetic image by synthesizing the first image captured by the first camera and the third image, and an output unit that is capable of outputting the synthetic image generated by the image synthesis unit.

[0008] Here, the "casing" in the present invention typically refers to a box-shaped container, but preferably includes a frame-shaped structure (frame body). Furthermore, the "image" in the present invention preferably includes not only a still image but also a moving image.

[0009] According to the present invention, since the second imaging element has light receiving sensitivity (in other words, electromagnetic wave receiving sensitivity) to the wavelength of the electromagnetic wave emitted by the electromagnetic wave transmitter, the electromagnetic wave emitted from the electromagnetic wave transmitter can be captured by the second camera.The second image capturing the electromagnetic wave emitted from the electromagnetic wave transmitter is converted into a monochrome third image, and a composite image is output by combining the first image captured by the first camera arranged at a camera position and camera angle substantially equal to those of the second camera with the third image.Therefore, even if the electromagnetic wave transmitter is an eavesdropping device that transmits electromagnetic waves at random timing, it is possible to reliably detect not only whether it is present in the space to be detected, but also where in the space to be detected the electromagnetic wave transmitter is present.

[0010] The electromagnetic wave transmitter detection device of the present invention may be an electromagnetic wave transmitter detection device that detects electromagnetic wave transmitters, and may include at least one camera having a filter in which visible light transparent material that can transmit wavelengths of visible light components and electromagnetic wave transparent material that can transmit a wavelength set to match the frequency of the electromagnetic waves emitted by the electromagnetic wave transmitter are arranged in a pattern, and an image sensor having light receiving sensitivity to wavelengths that pass through the filter, an image conversion unit that can convert an image captured by the camera into a monochrome converted image with a monochrome tone, an image synthesis unit that generates a composite image by synthesizing the image captured by the camera and the monochrome converted image, and an output unit that can output the composite image generated by the image synthesis unit.

[0011] According to the present invention, the camera has a filter in which a visible light transmitting material capable of transmitting the wavelength of the visible light component and an electromagnetic wave transmitting material capable of transmitting the wavelength of the electromagnetic wave transmitted by the electromagnetic wave transmitter are arranged in a pattern, and an image sensor having light receiving sensitivity to the wavelength transmitted by the filter, so that the electromagnetic wave transmitted from the electromagnetic wave transmitter can be captured in the image of the space to be detected captured by the camera. As a result, even if the electromagnetic wave transmitter is an electromagnetic wave transmitter such as a bugging device that transmits electromagnetic waves at random timing, it is possible to reliably detect not only whether it is present in the space to be detected, but also where in the space to be detected the electromagnetic wave transmitter is present.

[0012] In addition, an electromagnetic wave transmitter detection method according to the present invention may be an electromagnetic wave transmitter detection method for detecting an electromagnetic wave transmitter, comprising the steps of: (a) arranging at least one first camera having a first imaging element having a light sensitivity to a wavelength of a visible light component, and at least one second camera having a second imaging element having a light sensitivity set to match the frequency of the electromagnetic waves emitted by the electromagnetic wave transmitter, so that the camera positions and camera angles are approximately equal; (b) imaging the space to be detected using the first and second cameras; (c) converting the second image captured by the second camera into a monochrome third image; (d) generating a composite image by combining the first image captured by the first camera and the third image; and (e) outputting the generated composite image.

[0013] Here, the "image" in the present invention preferably includes not only still images but also moving images.

[0014] According to the present invention, since the second imaging element has light receiving sensitivity (in other words, electromagnetic wave receiving sensitivity) to the wavelength of the electromagnetic wave emitted by the electromagnetic wave transmitter, the electromagnetic wave emitted from the electromagnetic wave transmitter can be captured by the second camera.The second image capturing the electromagnetic wave emitted from the electromagnetic wave transmitter is converted into a monochrome third image, and a composite image is output by combining the first image captured by the first camera arranged at a camera position and camera angle substantially equal to those of the second camera with the third image.Therefore, even if the electromagnetic wave transmitter is an eavesdropping device that transmits electromagnetic waves at random timing, it is possible to reliably detect not only whether it is present in the space to be detected, but also where in the space to be detected the electromagnetic wave transmitter is present.

[0015] Furthermore, the electromagnetic wave transmitter detection program according to the present invention may be configured to cause a computer to execute at least steps (b) to (e) of the electromagnetic wave transmitter detection method according to the present invention described above.

[0016] According to the present invention, it is possible to achieve effects similar to those achieved by the electromagnetic wave transmitter detection method of the present invention described above, such as the effect of being able to reliably detect not only whether or not an electromagnetic wave transmitter, such as a bugging device that transmits electromagnetic waves at random timing, is present in the space to be detected, but also where in the space to be detected the electromagnetic wave transmitter is located.

[0017] The electromagnetic wave transmitter detection method of the present invention may be an electromagnetic wave transmitter detection method for detecting an electromagnetic wave transmitter, and may include the steps of: (f) capturing an image of a space to be detected using at least one camera having a filter in a pattern of visible light transparent material capable of transmitting wavelengths of visible light components and electromagnetic wave transparent material capable of transmitting a wavelength set to match the frequency of the electromagnetic waves emitted by the electromagnetic wave transmitter, and an imaging element having light receiving sensitivity to wavelengths that pass through the filter; (g) converting the image captured by the camera into a monochrome-toned monochrome-converted image; (h) generating a composite image by combining the image captured by the camera and the monochrome-converted image; and (i) outputting the generated composite image.

[0018] Here, the "image" in the present invention preferably includes not only still images but also moving images.

[0019] According to the present invention, a camera having a filter in which a visible light transmitting material capable of transmitting the wavelength of a visible light component and an electromagnetic wave transmitting material capable of transmitting the wavelength of an electromagnetic wave transmitted by an electromagnetic wave transmitter are arranged in a pattern, and an image sensor having a light receiving sensitivity to the wavelength transmitted by the filter is used to image the space to be detected, so that the electromagnetic waves transmitted from the electromagnetic wave transmitter can be imaged in the image of the space to be detected. As a result, even if an electromagnetic wave transmitter such as a wiretap that transmits electromagnetic waves at random timing is present in the space to be detected, it is possible to reliably detect not only whether it is present in the space to be detected, but also where in the space to be detected the electromagnetic wave transmitter is present.

[0020] The electromagnetic wave transmitter detection program according to the present invention may be configured to cause a computer to execute the electromagnetic wave transmitter detection method according to the present invention described above (specifically, at least steps (f) to (i)).

[0021] According to the present invention, it is possible to achieve effects similar to those achieved by the electromagnetic wave transmitter detection method of the present invention described above, such as the effect of being able to reliably detect not only whether or not an electromagnetic wave transmitter, such as a bugging device that transmits electromagnetic waves at random timing, is present in the space to be detected, but also where in the space to be detected the electromagnetic wave transmitter is located. Effect of the Invention

[0022] According to one aspect of the present invention, it is possible to reliably detect the presence and location of an electromagnetic wave transmitter. [Brief description of the drawings]

[0023] [Figure 1] 1 is a schematic diagram showing an outline of the configuration of an electromagnetic wave transmitter detection device according to a first embodiment of the present invention; [Diagram 2] 2 is a schematic diagram showing an outline of the configuration of a visible light video camera of the electromagnetic wave transmitter detection device of FIG. 1. [Diagram 3] 2 is a schematic diagram showing the schematic configuration of an electromagnetic wave video camera of the electromagnetic wave transmitter detection device of FIG. 1. [Figure 4] 1 is a functional block diagram showing a functional configuration of an electromagnetic wave transmitter detection device according to a first embodiment of the present invention. [Diagram 5] FIG. 2 is an explanatory diagram showing an example of one frame of visible light video data. [Figure 6] FIG. 2 is an explanatory diagram showing an example of one frame of electromagnetic wave video data. [Figure 7] FIG. 2 is an explanatory diagram showing an example of one frame of synthetic moving image data. [Figure 8] FIG. 2 is an explanatory diagram showing an example of one frame of visible light video data. [Figure 9]FIG. 2 is an explanatory diagram showing an example of one frame of electromagnetic wave video data. [Figure 10] FIG. 2 is an explanatory diagram showing an example of one frame of visible light video data. [Figure 11] FIG. 11 is a schematic diagram showing the configuration of an electromagnetic wave transmitter detection device according to a second embodiment of the present invention. [Figure 12] FIG. 12 is a schematic diagram showing the schematic configuration of a video camera of the electromagnetic wave transmitter detection device of FIG. 11. [Figure 13] FIG. 11 is a functional block diagram showing a functional configuration of an electromagnetic wave transmitter detection device according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. EXAMPLES

[0025] As shown in FIG. 1, the electromagnetic wave transmitter detection device 1 according to the first embodiment is configured as a device capable of detecting an electromagnetic wave transmitter, specifically, a bugging device, installed in a space to be detected such as a room.

[0026] The electromagnetic wave transmitter detection device 1 according to the first embodiment includes an imaging device 2 that captures an image of a space to be detected, and a personal computer (hereinafter, referred to as "PC") 50 that is connected by wire to the imaging device 2. In this embodiment, the imaging device 2 and the PC 50 are connected by wire, but it goes without saying that the imaging device 2 and the PC 50 may be connected wirelessly.

[0027] A wiretapping device is an example of an embodiment corresponding to the "electromagnetic wave transmitter" in the present invention. However, the "electromagnetic wave transmitter" in the present invention is not limited to a wiretapping device, and may broadly include various devices that transmit various information by electromagnetic waves.

[0028] As shown in FIG. 1, the imaging device 2 has a housing 4, and a visible light video camera 10 and an electromagnetic wave video camera 30 arranged on either side of the housing 4.

[0029] The housing 4 is configured as a polyhedron having six faces. Four support legs 6, 6, 6, 6 are detachably attached to the bottom surface of the housing 4.

[0030] In this embodiment, the imaging device 2 is configured to capture images while mounted on the housing 4 via support legs 6, 6, 6, 6, but it goes without saying that the imaging device 2 may also be configured to capture images while held in the hand.

[0031] As shown in FIG. 2, the visible light video camera 10 is configured as a typical digital video camera and has a lens 12, an image sensor 14 having a color filter 13, an image processing engine 16 electrically connected to the image sensor 14, a video output terminal 18 electrically connected to the image processing engine 16, a recording medium 20, an audio receiving unit 22, an LCD monitor 24, and a viewfinder 26, and a camera body 28 that houses these.

[0032] In this embodiment, the image sensor 14 is configured to use a CMOS (Complementary Metal Oxide Semiconductor) made of a semiconductor light receiving element, and has light receiving sensitivity in the wavelength range of visible light components, for example, 360 nm to 830 nm (converted into a frequency range of 361 THz to 833 THz). The semiconductor light receiving element included in the image sensor 14 may be a CCD (Charge Coupled Device).

[0033] The image processing engine 16 is a part that converts the video data generated by the image sensor 14 into a file that can be viewed as a video. The image processing engine 16 also associates the images and videos converted into the viewable files with audio signals received by the audio receiving unit 22, and outputs them to the PC 50 via the video output terminal 18 and also to the recording medium 20. The image processing engine 16 also outputs the images and videos converted into the viewable files to the LCD monitor 24 and the viewfinder 26. The video output terminal 18 and the PC 50 are connected by a cable 82 via an adapter 80 (see FIG. 1).

[0034] The visible light video camera 10 corresponds to a "first camera" in the present invention, and the image sensor 14 is an example of an embodiment corresponding to a "first imaging element" in the present invention.

[0035] In addition, the information associated with the images and videos converted into visible files in the image processing engine 16 is not limited to audio (specifically, audio signals), but may be, for example, temperature information measured by a temperature sensor, or further, various information that can be sensed by various sensors, etc.

[0036] 3, the electromagnetic wave video camera 30 has a lens 32, an image sensor 34, an image processing engine 36 electrically connected to the image sensor 34, a video output terminal 38 and a recording medium 40 electrically connected to the image processing engine 36, a camera body 44 that houses these components, and a bandpass filter 46 attached in front of the lens 32. Note that the bandpass filter 46 may be attached behind the lens 32.

[0037] In this embodiment, the image sensor 34 is configured to use a CMOS semiconductor light receiving element. The semiconductor light receiving element included in the image sensor 34 may be a CCD.

[0038] In this embodiment, the image sensor 34 has a light receiving sensitivity (in other words, a receiving sensitivity of electromagnetic waves) in the frequency range of electromagnetic waves transmitted by a bugging device, for example, in the range of 145 MHz to 430 MHz. This allows the image sensor 34 to receive and capture the electromagnetic waves transmitted by the bugging device, thereby making it possible to detect the location of the bugging device. The image sensor 34 may have a light receiving sensitivity (in other words, a receiving sensitivity of electromagnetic waves) in the frequency range of electromagnetic waves transmitted by a bugging device, that is, in the range of 800 MHz to 2 GHz.

[0039] The image processing engine 36 is a part that converts the video data generated by the image sensor 34 into a file that can be viewed as a video. The image processing engine 36 also outputs the images and videos converted into the viewable file to the PC 50 via the video output terminal 38 and to the recording medium 20. The video output terminal 38 and the PC 50 are connected by a cable 82 via an adapter 80 (see FIG. 1).

[0040] The bandpass filter 46 has a characteristic of being able to transmit wavelengths of 700 nm or more (converted into a frequency of 428 THz or less). That is, the bandpass filter 46 is configured as a filter that transmits wavelengths of approximately far-infrared rays or more while barely transmitting visible light. The wavelengths transmitted by the bandpass filter 46 are not limited to 700 nm or more (converted into a frequency of 428 THz or less), but are set to a range that does not transmit (or barely transmits) visible light and transmits wavelengths of approximately far-infrared rays or more.

[0041] The electromagnetic wave video camera 30 corresponds to a "second camera" of the present invention, and the image sensor 34 is an example of an embodiment corresponding to a "second imaging element" of the present invention.

[0042] Here, the range of the wavelength / waveband / frequency / frequency band of the electromagnetic wave that the electromagnetic wave video camera 30 (specifically, the image sensor 34) is intended to receive / receive is not limited to the range of 145MHz to 430MHz or 800MHz to 2GHz, and may be at least a part of the range of 1Hz to 1PHz. The range of the wavelength / waveband / frequency / frequency band of the electromagnetic wave that the electromagnetic wave video camera 30 (specifically, the image sensor 34) is intended to receive / receive may be appropriately set to include, for example, the wavelength / waveband / frequency / frequency band of the electromagnetic wave that is transmitted (or is assumed to be transmitted) by an electromagnetic wave transmitter as a device to be detected. Note that the electromagnetic wave frequency bands that are restricted for general use, the infrared electromagnetic wave frequency band, the ultraviolet electromagnetic wave frequency band, 2.4GHz, 100MHz, 200MHz, 300MHz, 400MHz, 700MHz, 800MHz, and 1200MHz may be excluded.

[0043] The PC 50 is configured as a microprocessor centered on a CPU (not shown), and includes a ROM (not shown) for storing various processing programs, a RAM (not shown) for temporarily storing data, a GPU (not shown) for performing calculation processing and matrix calculation processing required for image processing, a hard disk (HDD) (not shown) which is a large-capacity memory for storing various application programs (simply referred to as applications) including the electromagnetic wave transmitter detection program according to the present invention, and various data including image data and video data, and an input / output interface (I / F) (not shown) for inputting and outputting data to and from external devices. The PC 50 includes input devices (not shown), such as a keyboard and a mouse, through which the user inputs various commands, and a display 52 for displaying various information. The CPU, ROM, RAM, GPU, HDD, I / F, input device, and display 52 are electrically connected by a bus (not shown) and are configured to be able to exchange various control signals and data with each other.

[0044] In PC 50, the above-mentioned hardware resources such as the CPU, ROM, RAM, GPU, HDD, I / F, input device, and display 52, and software such as various applications and programs cooperate with each other to configure functional blocks such as a visible light video acquisition unit 61, an electromagnetic wave video acquisition unit 62, a video conversion unit 63, a video composition unit 64, a location identification unit 65, a storage unit 66, an output unit 67, and a display unit 68, as shown in Fig. 4. In other words, it can be said that these units (visible light video acquisition unit 61, electromagnetic wave video acquisition unit 62, video conversion unit 63, video composition unit 64, location identification unit 65, storage unit 66, output unit 67, and display unit 68) are functions realized by the individual or cooperative operation of each component (CPU, ROM, RAM, GPU, HDD, I / F, input device, display 52, etc.) in response to an instruction from the CPU that executes an application deployed from the HDD to the RAM. In addition, the visible light video acquisition unit 61, the electromagnetic wave video acquisition unit 62, the video conversion unit 63, the video synthesis unit 64, the location determination unit 65, the memory unit 66, the output unit 67, the display unit 68, etc. are electrically connected by bus lines (not shown) such as an address bus and a data bus.

[0045] Visible light video acquisition unit 61 acquires visible light video data captured by each visible light video camera 10 (see FIG. 1) arranged on each surface of housing 4, and supplies the acquired visible light video data to video synthesis unit 64, storage unit 66, etc. in a manner that enables identification of which of the six visible light video cameras 10 the visible light video data was captured by. Visible light video data is an example of an embodiment corresponding to the "first image" of the present invention.

[0046] The visible light moving image (first image) is an image captured using visible light, and may be a color image or a grayscale image.

[0047] The electromagnetic wave video acquisition unit 62 acquires electromagnetic wave video data captured by each electromagnetic wave video camera 30 (see FIG. 1) arranged on each side of the housing 4, and supplies the acquired electromagnetic wave video data to the video conversion unit 63, video synthesis unit 64, storage unit 66, etc. in a manner that makes it possible to identify which of the six electromagnetic wave video cameras 30 the electromagnetic wave video data was captured by. The electromagnetic wave video data is an example of an embodiment corresponding to the "second image" in the present invention.

[0048] The electromagnetic wave video (second image) is an image that targets the wavelength of the electromagnetic waves emitted by an electromagnetic wave transmitter (e.g., a bugging device), in other words, an image that represents the detection situation of the electromagnetic waves emitted by the electromagnetic wave transmitter, and may be a color image or a grayscale image.

[0049] The video conversion unit 63 acquires the electromagnetic wave video data from the electromagnetic wave video acquisition unit 62, converts the electromagnetic wave video data into monochrome electromagnetic wave video data, and supplies the converted monochrome electromagnetic wave video data to the video synthesis unit 64, the location identification unit 65, and the storage unit 66. The video conversion unit 63 is an example of an embodiment corresponding to the "image conversion unit" in the present invention. The monochrome electromagnetic wave video data is an example of an embodiment corresponding to the "third image" in the present invention.

[0050] The monochrome electromagnetic wave moving image (third image) is an image obtained by converting the electromagnetic wave moving image (second image) into a monochrome image.

[0051] The monochrome electromagnetic wave video data (third image) is, for example, a video (image) of transparency and white, and is a video (image) that is converted so that the color increases depending on the intensity of the sensed electromagnetic wave (i.e., the part where the intensity of the sensed electromagnetic wave is zero is transparent). Note that the monochrome electromagnetic wave video data (third image) is not limited to a video (image) of transparency and a certain single color (in other words, a predetermined single color), and may be, for example, a video (image) of transparency and black, a video (image) of transparent and red, a video (image) of transparent and blue, or a video (image) of transparent and green.

[0052] The moving image synthesizing unit 64 synthesizes the visible light moving image data from the visible light moving image acquiring unit 61 and the monochrome electromagnetic wave moving image data from the moving image converting unit 63, and supplies each synthesized synthesized moving image data to the storage unit 66 and the output unit 67 in a manner that makes it possible to identify which of the six visible light video cameras 10 and six electromagnetic wave video cameras 30 the image was captured by. The moving image synthesizing unit 64 is an example of an embodiment corresponding to the "image synthesizing unit" of this invention.

[0053] The monochrome electromagnetic wave video data (third image) is a video (image) of transparency and a certain single color (predetermined single color), and is a video (image) converted so that the color increases according to the intensity of the sensed electromagnetic wave, and the video synthesis unit 64 generates a synthetic image by superimposing (in other words, overlaying) the monochrome electromagnetic wave video (third image; specifically, each frame of the monochrome electromagnetic wave video data) on the visible light video (first image; specifically, each frame of the visible light video data) as a process of synthesizing the visible light video (first image; specifically, each frame of the visible light video data) (see Figs. 9 and 10). Note that in Fig. 9, the transparent parts of the monochrome electromagnetic wave video (third image) are displayed in black so that the parts where the bugging device (specifically, the electromagnetic waves emitted from the bugging device as an electromagnetic wave transmitter) are captured can be easily seen.

[0054] A composite image is an image obtained by combining a visible light video (first image) and a monochrome electromagnetic wave video (third image), for example, an image in which a color image (first image) is superimposed with a monochrome image (third image) in which parts where the intensity of the detected electromagnetic waves is zero (or below a predetermined threshold) are transparent and the color increases according to the intensity of the detected electromagnetic waves.

[0055] The location determination unit 65 uses the monochrome electromagnetic wave video data from the video conversion unit 63 to determine whether the monochrome electromagnetic wave video data includes a frame in which a bugging device (specifically, electromagnetic waves emitted from a bugging device as an electromagnetic wave transmitter) is captured, and if a frame in which a bugging device is captured is present, the location determination unit 65 determines the location (i.e., place, position) of the bugging device in that frame.

[0056] Specifically, the location determining unit 65 uses image processing to determine whether or not there is a white-light part in each frame of the monochrome electromagnetic wave video data, and if there is a white-light part, identifies the white-light part as the location of the bug. The location determining unit 65 then supplies the location of the bug identified in a frame of the monochrome electromagnetic wave video data to the display unit 68 as position information in that frame. The location determining unit 65 is an example of an embodiment corresponding to the "frame determining unit" and "location determining unit" of the present invention.

[0057] When determining whether or not there is a white light part in each frame of monochrome electromagnetic wave video data (i.e., a part in which the electromagnetic waves emitted from a bugging device as an electromagnetic wave transmitter are captured), in other words, when determining whether or not there is a pixel corresponding to a white light part in each frame of monochrome electromagnetic wave video data, a threshold value for the monochrome intensity for each pixel may be set, and a threshold value related to the degree of pixel grouping may also be set.

[0058] In the present invention, the density of a single color (in other words, a specific single color) among white, black, green, red, and blue in monochrome electromagnetic wave video data is defined as "monochrome intensity." With regard to monochrome intensity, 0 is transparent (i.e., the background color of the visible light video (first image), i.e., the visible light video remains the same), and the maximum value is the maximum monochrome density.

[0059] And, in relation to the monochrome intensity of the white-glowing parts in each frame of the monochrome electromagnetic wave video data, in the monochrome image (third image), the stronger the intensity of the electromagnetic waves (white-glowing parts) emitted and detected from the electromagnetic wave transmitter (e.g., bugging device), the denser the monochrome density of the white-glowing parts (i.e., the monochrome intensity becomes stronger). Here, the intensity range of the electromagnetic waves is from 0 to infinity, whereas the monochrome density range is finite, being from transparency (i.e., the background color of the visible light video (first image)) to the monochrome maximum density. For this reason, a minimum and maximum value of the light receiving sensitivity (in other words, the electromagnetic wave receiving sensitivity) are provided, and the minimum and maximum values ​​may be adjusted and set so that the white-glowing parts are displayed well (in other words, easily visible) in the composite image.

[0060] In this case, the transparent (i.e., monochromatic intensity = 0) parts in the monochrome image (third image) correspond to the minimum value of the receiving sensitivity of the intensity of the electromagnetic wave transmitted from the electromagnetic wave transmitter (wiretap), and all electromagnetic wave intensities below this minimum value become transparent (i.e., monochromatic intensity = 0). Also, the monochromatic intensity = maximum monochromatic density in the monochrome image (third image) corresponds to the maximum value of the receiving sensitivity of the intensity of the electromagnetic wave transmitted from the electromagnetic wave transmitter (wiretap), and all electromagnetic wave intensities above this maximum value become monochromatic intensity = maximum monochromatic density. And, the minimum and maximum values ​​of the receiving sensitivity of the intensity of the electromagnetic wave transmitted from the electromagnetic wave transmitter (wiretap) may each be appropriately settable.

[0061] In addition, a certain single color in the monochrome electromagnetic wave video data may be selectively set to any one of white, black, green, red, and blue. The single color maximum density is pure white, pure black, pure green, pure red, and pure blue, respectively. Also, for example, when the visible light video (first image) is a bright and whitish image, the single color (i.e., the white-glowing part) may be easily distinguished by changing the single color from white to black, etc.

[0062] The memory unit 66 stores the visible light video data, the electromagnetic wave video data, the monochrome electromagnetic wave video data, and the composite video data in a manner that makes it possible to identify which of the six visible light video cameras 10 and six electromagnetic wave video cameras 30 the image was captured by.

[0063] The output unit 67 outputs the composite video data generated in the video synthesis unit 64 to the display unit 68 in a manner that makes it possible to identify which of the six visible light video cameras 10 and six electromagnetic wave video cameras 30 the image was captured by.

[0064] The display unit 68 displays the composite video data from the output unit 67 on the display 52 in such a manner that it is possible to identify which of the six visible light video cameras 10 and six electromagnetic wave video cameras 30 the image was captured by. Furthermore, when the composite video data includes a frame including a bugging device, the display unit 68 displays the location of the bugging device identified by the location identification unit 65 in such a manner that the location can be visually confirmed. In this embodiment, the location of the bugging device is displayed by encircling it with a frame (see FIG. 10). The location of the bugging device may also be displayed by being pointed out with a mark such as an arrow.

[0065] Next, the operation of the thus configured electromagnetic wave transmitter detection device 1, particularly the operation when detecting a bugging device, will be described. When detecting a bugging device, first, the electromagnetic wave transmitter detection device 1 is installed in the space to be detected, such as a room where a bugging device is suspected to be installed.

[0066] When the installation of the electromagnetic wave transmitter detection device 1 in the space to be detected is completed, the imaging device 2 is started and the electromagnetic wave transmitter detection program of the present invention is executed by operating the PC 50. This causes the electromagnetic wave transmitter detection program of the present invention stored in a memory including a ROM to be read by the CPU, and information is processed according to the steps instructed by the program, thereby executing the electromagnetic wave transmitter detection method of the present invention.

[0067] When the electromagnetic wave transmitter detection program is executed, first, visible light video acquisition section 61 and electromagnetic wave video acquisition section 62 execute a process of acquiring visible light video data and electromagnetic wave video data from each of six visible light video cameras 10 and six electromagnetic wave video cameras 30. Next, video conversion section 63 acquires each piece of electromagnetic wave video data acquired by electromagnetic wave video acquisition section 62 and executes a process of converting each piece of electromagnetic wave video data into monochrome electromagnetic wave video data.

[0068] When the monochrome electromagnetic wave video data is generated, video composition unit 64 generates composite video data by combining each visible light video data acquired by visible light video acquisition unit 61 with each corresponding monochrome electromagnetic wave video data. Then, output unit 67 executes a process of outputting each generated composite video data to display unit 68.

[0069] Meanwhile, the location determination unit 65 uses each generated monochrome electromagnetic wave video data to perform a process of determining whether or not the monochrome electromagnetic wave video data includes a frame in which a bugging device (specifically, electromagnetic waves emitted from the bugging device as an electromagnetic wave transmitter) is captured.

[0070] Here, the determination of whether or not a frame in which a bugging device is captured is included can be performed by determining whether or not there is a white-light portion in each frame of each monochrome electromagnetic wave video data by image processing of each monochrome electromagnetic wave video data by the location identification unit 65. In this case, a monochromatic intensity threshold value for each pixel may be set to determine whether or not there is a pixel corresponding to a white-light portion in each frame of the monochrome electromagnetic wave video data, and a threshold value relating to the degree of pixel clustering may also be set.

[0071] When it is determined that there is a frame in which a bugging device is captured in any of the monochrome electromagnetic wave video data, the location (i.e., place, position) of the bugging device is identified in that frame. Specifically, the white light part in that frame is identified as the location of the bugging device. Then, the location identification unit 65 supplies the location of the bugging device identified in the frame of the monochrome electromagnetic wave video data to the display unit 68 as position information in that frame.

[0072] Finally, the display unit 68 executes a process of displaying each composite video data on the display 52. ​​At this time, when any of the monochrome electromagnetic wave video data constituting each composite video data includes a frame in which a bugging device is captured, the display unit 68 displays the location of the bugging device by surrounding it with a frame on the corresponding composite video data.

[0073] Figures 5 and 8 are explanatory diagrams showing an example of one frame of first and second visible light video data captured by any two of the six visible light video cameras 10 (hereinafter, for convenience, these may be referred to as the "first visible light video camera" and the "second visible light video camera"), Figures 6 and 9 are explanatory diagrams showing an example of one frame of first and second monochrome electromagnetic wave video data obtained by converting the first and second electromagnetic wave video data captured by two electromagnetic wave video cameras 30 (hereinafter, for convenience, these may be referred to as the "first electromagnetic wave video camera" and the "second electromagnetic wave video camera") that are paired with any two of the first and second visible light video cameras mentioned above among the six electromagnetic wave video cameras 30, into monochrome tones, and Figures 7 and 10 are explanatory diagrams showing an example of one frame of first and second synthesized video data obtained by synthesizing the first and second visible light video data and the first and second monochrome electromagnetic wave video data, respectively.

[0074] Note that the monochrome electromagnetic wave video data (third image) is a video (image) of transparency and a certain solid color, and is a video (image) that has been converted so that the color increases depending on the intensity of the detected electromagnetic waves. In Figures 6 and 9, the transparent parts of the video (image) are displayed in black so that it is easy to see the parts that capture the bugging device (specifically, the electromagnetic waves emitted from the bugging device as an electromagnetic wave transmitter).

[0075] When an image is captured of a space in which no bugging device is installed, no white-glowing parts are captured in the first monochrome electromagnetic wave video data and the first composite video data, as shown in Figures 6 and 7. On the other hand, when an image is captured of a space in which a bugging device is installed, white-glowing parts are captured in the second monochrome electromagnetic wave video data and the second composite video data, as shown in Figures 9 and 10, and the white-glowing parts in the second composite video are displayed on display 52 surrounded by a frame.

[0076] According to the electromagnetic wave transmitter detection device 1 of the embodiment 1 described above, the six visible light video cameras 10 each having an image sensor 14 having a light sensitivity to the wavelength of the visible light component, and the six electromagnetic wave video cameras 30 each having an image sensor 34 having a light sensitivity to the wavelength of the electromagnetic wave emitted by the bugging device are arranged at substantially the same position and angle as the six visible light video cameras 10, and the visible light video data captured by the visible light video cameras 10 and the monochrome electromagnetic wave video data obtained by converting the electromagnetic wave video data captured by the electromagnetic wave video cameras 30 into monochrome are synthesized and output, so that it is possible to reliably detect whether or not a bugging device is installed and its location. Note that since the space to be detected is captured as a video, it is possible to reliably detect whether or not a bugging device is installed and its location even if the bugging device transmits electromagnetic waves at random timing. In addition, since six visible light video cameras 10 and six electromagnetic wave video cameras 30 are used, all directions in the space to be detected can be detected simultaneously, so that a bugging device can be detected in a short time. Furthermore, if a bugging device is installed, a frame is displayed around the location of the bugging device on the composite video displayed on the display 52, so that the location of the bugging device can be easily known.

[0077] In the electromagnetic wave transmitter detection device 1 of the first embodiment, the imaging device 2 has a configuration including a visible light video camera 10 and an electromagnetic wave video camera 30, but is not limited thereto. For example, the imaging device 2 may have a visible light digital camera instead of the visible light video camera 10, or an electromagnetic wave digital camera instead of the electromagnetic wave video camera 30. When the imaging device 2 has a visible light digital camera and an electromagnetic wave video camera 30, the video synthesis unit 64 may select one frame (hereinafter referred to as "monochrome image data") from the monochrome video data converted by the video conversion unit 63, and synthesize the visible light image data captured by the visible light digital camera with the monochrome image data. When the monochrome video data includes a frame in which a bugging device is captured, the video synthesis unit 64 selects the monochrome image data in which the bugging device is captured and synthesizes it with the visible light image data.

[0078] In the electromagnetic wave transmitter detection device 1 of the first embodiment, the imaging device 2 has six visible light video cameras 10 and six electromagnetic wave video cameras 30, but is not limited to this. For example, the imaging device 2 may have only one set of visible light video cameras 10 and electromagnetic wave video cameras 30, or may have two to five, or seven or more visible light video cameras 10 and electromagnetic wave video cameras 30.

[0079] In the electromagnetic wave transmitter detection device 1 of the first embodiment, the electromagnetic wave transmitter detection device 1 includes a video conversion unit 63, and the video conversion unit 63 converts the electromagnetic wave video data into monochrome electromagnetic wave video data, but the present invention is not limited to this. For example, the image processing engine 36 of the electromagnetic wave video camera 30 may convert the electromagnetic wave video data into monochrome electromagnetic wave video data. EXAMPLES

[0080] Next, a description will be given of an electromagnetic wave transmitter detection device 100 according to a second embodiment. As shown in Fig. 11, the electromagnetic wave transmitter detection device 100 according to the second embodiment is configured as a device capable of detecting an electromagnetic wave transmitter, specifically, a bugging device, installed in a space to be detected such as a room.

[0081] The electromagnetic wave transmitter detection device 100 according to the second embodiment includes an imaging device 102 that captures an image of a space to be detected, and a PC 150 that is connected by wire to the imaging device 102. In this embodiment, the imaging device 102 and the PC 150 are connected by wire, but it goes without saying that the imaging device 102 and the PC 150 may be connected wirelessly.

[0082] The electromagnetic wave transmitter detection device 100 according to the second embodiment has a configuration in which the visible light video camera 10 and the electromagnetic wave video camera 30 are replaced with a video camera 110, and accordingly, the visible light video acquisition unit 61 and the electromagnetic wave video acquisition unit 62 are replaced with a video acquisition unit 161, and the video conversion unit 63 and the video synthesis unit 64 are deleted from the electromagnetic wave transmitter detection device 1 according to the first embodiment (note that, as will be described later, the configuration may include the video conversion unit 63 and the video synthesis unit 64). In order to avoid redundant explanation, the configuration of the electromagnetic wave transmitter detection device 100 according to the second embodiment that corresponds to the configuration of the electromagnetic wave transmitter detection device 1 according to the first embodiment is denoted by the same reference numerals, and detailed explanations thereof will be omitted.

[0083] As shown in FIG. 12, the video camera 110 of the second embodiment has a lens 112, an image sensor 114 having a filter 113, an image processing engine 116 electrically connected to the image sensor 114, a video output terminal 118 electrically connected to the image processing engine 116, a recording medium 120, and an audio receiving unit 122, and a camera body 124 that houses these.

[0084] Filter 113 has a configuration in which visible light transmitting materials (e.g., red, green, and blue color resists) capable of transmitting wavelengths of visible light components, for example, wavelengths in the range of 360 nm to 830 nm (converted into frequencies, 361 THz to 833 THz), and electromagnetic wave transmitting materials capable of transmitting frequencies of electromagnetic waves emitted by a bugging device, for example, wavelengths in the range of 145 MHz to 430 MHz, are arranged in a pattern. Filter 113 may have a configuration in which electromagnetic wave transmitting materials capable of transmitting wavelengths in the range of 800 MHz to 2 GHz, which is the frequency of electromagnetic waves emitted by a bugging device, are arranged in a pattern.

[0085] In this embodiment, the image sensor 114 is configured to use a CMOS semiconductor light receiving element. The semiconductor light receiving element included in the image sensor 114 may be a CCD.

[0086] The image sensor 114 has a light receiving sensitivity (in other words, a receiving sensitivity of electromagnetic waves) in a wavelength range of visible light components, for example, 360 nm to 830 nm (converted into a frequency range of 361 THz to 833 THz), and in a frequency range of electromagnetic waves emitted by a bugging device, for example, 145 MHz to 430 MHz. This allows the image (video) of the space to be detected to be captured, and also allows the electromagnetic waves emitted by the bugging device to be received and captured. As a result, the location of the bugging device can be detected. The image sensor 114 may have a light receiving sensitivity (in other words, a receiving sensitivity of electromagnetic waves) in a frequency range of 800 MHz to 2 GHz, which is the frequency of electromagnetic waves emitted by a bugging device.

[0087] The image processing engine 116 is a part that converts the video data generated by the image sensor 114 into a file that can be viewed as a video. The image processing engine 116 also outputs the images and videos converted into the viewable file to the PC 150 via the video output terminal 118 and also to the recording medium 120. The video output terminal 118 and the PC 150 are connected by a cable 82 via an adapter 80 (see FIG. 11).

[0088] The video camera 110 corresponds to a "camera" of the present invention, and the image sensor 114 is an example of an embodiment corresponding to an "imaging element" of the present invention.

[0089] Note that the video camera 110 of the second embodiment may also have an audio receiving unit 22, similar to the visible light video camera 10 of the first embodiment. The image or video converted into a visible file in the image processing engine 116 may be associated with an audio signal received by the audio receiving unit 22 and output to the PC 150 via the video output terminal 118 and also to the recording medium 120. In this case, the information associated with the image or video converted into a visible file in the image processing engine 116 is not limited to audio (specifically, an audio signal), but may be, for example, information on temperature measured by a temperature sensor, or may be various information that can be sensed by various sensors, etc.

[0090] Here, the range of the frequency / frequency band of the electromagnetic wave corresponding to the wavelength / wavelength band of the electromagnetic wave emitted by the bugging device, which is transmitted through the electromagnetic wave transmitting material of the filter 113 of the video camera 110 and received / received by the image sensor 114, is not limited to the range of 145MHz to 430MHz or 800MHz to 2GHz, and may be at least a part of the range of 1Hz to 1PHz. The range of the wavelength / wavelength band / frequency / frequency band of the electromagnetic wave transmitted through the electromagnetic wave transmitting material of the filter 113 of the video camera 110 and received / received by the image sensor 114 may be appropriately set to include, for example, the wavelength / wavelength band / frequency / frequency band of the electromagnetic wave transmitted (or assumed to be transmitted) by an electromagnetic wave transmitter as a device to be detected. Note that the range of the wavelength / wavelength band / frequency / frequency band of the electromagnetic wave received / received by the image sensor 114 may include the wavelength / wavelength band / frequency / frequency band of the visible light component. Additionally, electromagnetic wave frequency bands that are restricted for general use, infrared electromagnetic wave frequency bands, ultraviolet electromagnetic wave frequency bands, 2.4 GHz, 100 MHz, 200 MHz, 300 MHz, 400 MHz, 700 MHz, 800 MHz, and 1200 MHz may be excluded.

[0091] The PC 150 of the second embodiment is configured as a microprocessor centered on a CPU (not shown), and includes a ROM (not shown) for storing various processing programs, a RAM (not shown) for temporarily storing data, a GPU (not shown) for performing calculation processing and matrix calculation processing required for image processing, a hard disk (HDD) (not shown) which is a large-capacity memory for storing various application programs (simply referred to as applications) including the electromagnetic wave transmitter detection program according to the present invention and various data including image data and video data, and an input / output interface (I / F) (not shown) for inputting and outputting data to and from external devices. The PC 150 includes input devices (not shown), such as a keyboard and a mouse, through which the user inputs various commands, and a display 52 for displaying various information. The CPU, ROM, RAM, GPU, HDD, I / F, input device, and display 52 are electrically connected by a bus (not shown) and are configured to be able to exchange various control signals and data with each other.

[0092] In the PC 150, the above-mentioned hardware resources such as the CPU, ROM, RAM, GPU, HDD, I / F, input device, and display 52, and software such as various applications and programs cooperate with each other to configure the video acquisition unit 161, the location identification unit 65, the storage unit 66, the output unit 67, the display unit 68, and the like as functional blocks, as shown in FIG. 13. In other words, it can be said that these units (the video acquisition unit 161, the location identification unit 65, the storage unit 66, the output unit 67, and the display unit 68) are functions that are realized by the operation of each component (the CPU, ROM, RAM, GPU, HDD, I / F, input device, display 52, and the like) alone or in cooperation with each other, in response to an instruction from the CPU that executes an application deployed from the HDD to the RAM. The video acquisition unit 161, the location identification unit 65, the storage unit 66, the output unit 67, the display unit 68, and the like are electrically connected by bus lines (not shown) such as an address bus and a data bus.

[0093] Video acquisition unit 161 acquires video data captured by video cameras 110 (see FIG. 11) arranged on each surface of housing 4, and supplies the acquired video data to location identification unit 65, storage unit 66, output unit 67, etc. in a manner that enables identification of which of the six video cameras 110 the video data was captured by. Video data is an example of an embodiment corresponding to "image" in the present invention.

[0094] A moving image (image) is an image that targets visible light as well as the wavelength of electromagnetic waves emitted by an electromagnetic wave transmitter (e.g., a bugging device), in other words, an image that represents the detection situation of the electromagnetic waves emitted by an electromagnetic wave transmitter, and may be a color image or a grayscale image.

[0095] The electromagnetic wave transmitter detection device 100 according to the second embodiment may also include a video conversion unit 63 and a video synthesis unit 64. The video conversion unit 63 of the electromagnetic wave transmitter detection device 100 according to the second embodiment acquires video data from the video acquisition unit 161, converts the video data into monochrome video data with a monochrome tone, and supplies the converted monochrome video data to the video synthesis unit 64, the location identification unit 65, and the storage unit 66. The monochrome video data is an example of an embodiment corresponding to the "monochrome converted image" in the present invention.

[0096] The monochrome moving image (monochrome converted image) is an image obtained by converting the moving image (image) supplied from the moving image acquisition unit 161 into a monochrome image. The monochrome moving image (monochrome converted image) is a moving image (image) having the same characteristics as the monochrome electromagnetic wave moving image (third image) in the first embodiment.

[0097] The video synthesis unit 64 of the electromagnetic wave transmitter detection device 100 of Example 2 synthesizes the video data from the video acquisition unit 161 and the monochrome video data from the video conversion unit 63, and supplies each synthesized composite video data to the memory unit 66 and the output unit 67 in a manner that makes it possible to identify which of the six video cameras 110 captured the image.

[0098] The location identification unit 65 of the electromagnetic wave transmitter detection device 100 of Example 2 uses video data from the video acquisition unit 161 or monochrome video data from the video conversion unit 63 to determine whether or not the video data or monochrome video data includes a frame in which a bugging device (specifically, electromagnetic waves emitted from a bugging device as an electromagnetic wave transmitter) is captured, and if a frame in which a bugging device is captured is included, the location identification unit 65 identifies the location (i.e., place, position) of the bugging device in that frame.

[0099] Specifically, the location determining unit 65 determines whether or not there is a white-light part in each frame of the video data or monochrome video data by image processing, and if there is a white-light part, identifies the white-light part as the location of the bugging device. The location determining unit 65 then supplies the location of the bugging device identified in the frame of the video data or monochrome video data to the display unit 68 as position information for that frame.

[0100] When determining whether or not there is a white-light part in each frame of monochrome video data (i.e., a part where the electromagnetic waves emitted from a bugging device as an electromagnetic wave transmitter are captured), in other words, when determining whether or not there is a pixel corresponding to a white-light part in each frame of monochrome video data, a threshold value for the monochrome intensity for each pixel may be set, and a threshold value related to the degree of pixel grouping may also be set.

[0101] The video synthesis unit 64 of the electromagnetic wave transmitter detection device 100 of Example 2 synthesizes video data (image) and monochrome video data (monochrome converted image), for example, by superimposing (in other words, overlaying) a monochrome video (monochrome converted image; specifically, each frame of the monochrome video data) on a video (image; specifically, each frame of the video data) to generate a synthetic image.

[0102] The composite image is an image obtained by combining a video (image) supplied from the video acquisition unit 161 with a monochrome video (monochrome converted image), for example, an image in which a color image (image supplied from the video acquisition unit 161) is superimposed with a monochrome image (monochrome converted image) in which the parts where the intensity of the detected electromagnetic waves is zero (or below a predetermined threshold) are transparent and the color increases according to the intensity of the detected electromagnetic waves.

[0103] The storage unit 66 stores the video data, the monochrome video data, and the composite video data in a manner that makes it possible to identify which of the six video cameras 110 captured the data.

[0104] The output unit 67 outputs the video data and the composite video data to the display unit 68 in a manner that makes it possible to identify which of the six video cameras 110 the video data was taken by.

[0105] The display unit 68 displays the moving image data and composite moving image data from the output unit 67 on the display 52 in a manner that makes it possible to identify which of the six video cameras 110 the image was taken by. Furthermore, when the moving image data or composite moving image data contains a frame including a bugging device, the display unit 68 displays the location of the bugging device identified by the location identification unit 65 in a manner that allows visual confirmation. In this embodiment, the location of the bugging device is displayed by enclosing it in a frame (see FIG. 10).

[0106] Next, the operation of the thus configured electromagnetic wave transmitter detection device 100, particularly the operation when detecting a bugging device, will be described. When detecting a bugging device, first, the electromagnetic wave transmitter detection device 100 is installed in the space to be detected, such as a room where a bugging device is suspected to be installed.

[0107] When the installation of the electromagnetic wave transmitter detection device 100 in the space to be detected is completed, the imaging device 102 is started and the electromagnetic wave transmitter detection program of the present invention is executed by operating the PC 150. This causes the electromagnetic wave transmitter detection program of the present invention stored in a memory including a ROM to be read by the CPU, and information is processed according to the steps instructed by the program, thereby executing the electromagnetic wave transmitter detection method of the present invention.

[0108] When the electromagnetic wave transmitter detection program is executed, first, the video acquisition unit 161 executes a process of acquiring video data from each of the six video cameras 110, and the location determination unit 65 executes a process of using the video data or monochrome video data to determine whether or not the video data or monochrome video data includes a frame in which a bugging device (specifically, electromagnetic waves emitted from the bugging device as an electromagnetic wave transmitter) is captured.

[0109] Here, the determination as to whether or not a frame in which a bugging device is captured is included can be made by the location determination unit 65 performing image processing on each video data or monochrome video data to determine whether or not each frame of the video data or monochrome video data has a white-light portion. When it is determined that either the video data or monochrome video data has a frame in which a bugging device is captured, the location (i.e., place, position) of the bugging device is identified in that frame. Specifically, the white-light portion in that frame is identified as the location of the bugging device. Then, the location determination unit 65 supplies the location of the bugging device identified in the frame of the video data or monochrome video data to the display unit 68 as position information in that frame.

[0110] Finally, the display unit 68 executes a process of displaying each piece of video data or each piece of composite video data on the display 52. ​​At this time, if any of the monochrome video data constituting each piece of video data or each piece of composite video data includes a frame in which a bugging device is captured, the display unit 68 displays the location of the bugging device by surrounding it with a frame on the corresponding video data or composite video data.

[0111] The electromagnetic wave transmitter detection device 100 according to the second embodiment described above also has the same effects as those of the electromagnetic wave transmitter detection device 1 according to the first embodiment, specifically, the effect of being able to reliably detect whether or not a bugging device is installed and its location even if the bugging device transmits electromagnetic waves at random timing, the effect of being able to detect the bugging device in a short time because all directions in the space to be detected can be detected simultaneously, the effect of being able to easily know the location of the bugging device, etc. In addition, according to the electromagnetic wave transmitter detection device 100 according to the second embodiment, only one video camera 110 is arranged on each side of the housing 4, so that the number of parts can be reduced. EXAMPLES

[0112] Next, a detection device 200 according to a third embodiment will be described. The detection device 200 according to the third embodiment is configured as a device capable of detecting electromagnetic wave reflecting objects installed underground as a detection target, specifically, landmines. However, the "electromagnetic wave reflecting objects" in the present invention are not limited to landmines, but widely include various devices and objects that can reflect electromagnetic waves. The detection device 200 is an example of an embodiment corresponding to the "electromagnetic wave reflecting object detection device" in the present invention.

[0113] The detection device 200 according to the third embodiment is configured to include a mechanism for transmitting electromagnetic waves (electromagnetic wave transmission unit) in addition to the configuration of the electromagnetic wave transmitter detection device 1 according to the first embodiment or the electromagnetic wave transmitter detection device 100 according to the second embodiment. The detection device 200 transmits electromagnetic waves as transmission waves toward the ground by the electromagnetic wave transmission unit, and receives / receives response waves (i.e., electromagnetic waves) that are reflected by an electromagnetic wave reflector that is a detection target present in the ground and return, thereby acquiring underground data. In other words, the detection device 200 is configured as a mechanism for detecting the state of the ground in the depth direction. The electromagnetic waves transmitted from the electromagnetic wave transmission unit toward the ground may be pulsed electromagnetic waves.

[0114] The operation of detection device 200 is similar to that of electromagnetic wave transmitter detection device 1 of Example 1 and electromagnetic wave transmitter detection device 100 of Example 2, except that, when the electromagnetic waves transmitted as transmission waves into the ground are reflected by an electromagnetic wave reflecting object that is the detection target existing underground and a response wave (i.e., electromagnetic waves) is received, visible light video acquisition unit 61 and electromagnetic wave video acquisition unit 62 execute processes to acquire visible light video data and electromagnetic wave video data from visible light video camera 10 and electromagnetic wave video camera 30, respectively (in the case of a configuration corresponding to electromagnetic wave transmitter detection device 1 of Example 1), and video acquisition unit 161 executes processes to acquire video data from video camera 110 (in the case of a configuration corresponding to electromagnetic wave transmitter detection device 100 of Example 2).

[0115] The camera angles of the visible light video camera 10 and the electromagnetic wave video camera 30 (in the case of a configuration corresponding to the electromagnetic wave transmitter detection device 1 according to the first embodiment) and the video camera 110 (in the case of a configuration corresponding to the electromagnetic wave transmitter detection device 100 according to the second embodiment) are adjusted to a camera angle that can receive a response wave (i.e., an electromagnetic wave) that is returned after being reflected by an electromagnetic wave reflector that is a detection target existing underground, which is an electromagnetic wave emitted as a transmission wave from an electromagnetic wave emitting unit toward the ground. Specifically, for example, the camera angle is adjusted to face the ground (ground surface).

[0116] When detection device 200 detects underground mines as electromagnetic wave reflectors, the wavelength / wavelength band / frequency / frequency band range of the electromagnetic waves emitted into the ground (and the electromagnetic waves as response waves reflected by underground mines and returning) is not limited to a specific wavelength / wavelength band / frequency / frequency band, and as there are various types of underground mines, such as those made of plastic or metal, the wavelength / wavelength band / frequency / frequency band range is set appropriately taking into consideration the materials assumed to be used in the mines and the composition of the soil on the surface of the ground where the mines are buried.

[0117] The detection device 200 may detect water leaks from underground water pipes as electromagnetic wave reflectors, and the wavelength / wavelength band / frequency / frequency band range of the electromagnetic waves (and the electromagnetic waves as response waves reflected and returned by underground water pipes and water leaking from the water pipes) emitted into the ground when detecting water leaks is not limited to a specific wavelength / wavelength band / frequency / frequency band. When the detection device 200 detects underground water pipes and water leaks from the water pipes, the wavelength / wavelength band / frequency / frequency band range of the electromagnetic waves (and the electromagnetic waves as response waves reflected and returned by underground water pipes and water) emitted into the ground when the detection device 200 detects underground water pipes and water leaks from the water pipes is appropriately set, for example, taking into consideration whether the electromagnetic waves are reflected by the water pipes or the water, the material used in the water pipes, and the composition of the soil in the land where the water pipes are buried.

[0118] In the electromagnetic wave transmitter detection device 1,100 of the first and second embodiments and the detection device 200 of the third embodiment, the electromagnetic wave transmitter detection device 1,100 and the detection device 200 are configured to include the imager 2,102 and the PC 50,150, but this is not limited thereto. The electromagnetic wave transmitter detection device 1,100 and the detection device 200 may be configured such that the imager 2,102 has the function of the PC 50,150. In other words, the electromagnetic wave transmitter detection device 1,100 and the detection device 200 may not be configured to include the imager 2,102 and the PC 50,150 separately, but may be configured as a dedicated device in which the imager 2,102 and the PC 50,150 are integrated.

[0119] (Action and effect) According to the electromagnetic wave transmitter detection device 1,100 of the first and second embodiments (embodiments), a frame in which the electromagnetic waves emitted by the electromagnetic wave transmitter are presumed to have been captured is specified from the image converted to monochrome, so that it is possible to reliably detect the presence and location of the electromagnetic wave transmitter. Also, according to the detection device 200 of the third embodiment (embodiment), a frame in which the electromagnetic waves reflected by an electromagnetic wave reflecting object and returned are presumed to have been captured is specified from the image converted to monochrome, so that it is possible to reliably detect the presence and location of the electromagnetic wave reflecting object.

[0120] Although examples (embodiments) of the present invention have been described above, the specific configuration of the present invention is not limited to the above examples, and the present invention also includes forms in which the above examples have been modified or changed within the scope of the gist of the present invention.

[0121] (Additional Note) According to a preferred embodiment of the first electromagnetic wave transmitter detection device of the present invention, the device includes a housing, at least one first camera arranged in the housing, at least one second camera arranged in the housing so as to have a camera position and a camera angle substantially equal to those of the first camera, an image conversion unit, an image synthesis unit, and an output unit. The first camera includes a first imaging element having a light receiving sensitivity to the wavelength of a visible light component. The second camera includes a second imaging element having a light receiving sensitivity equal to or higher than the wavelength of an infrared component. The image conversion unit can convert a second image captured by the second camera into a monochrome third image. The image synthesis unit generates a synthetic image by synthesizing the first image captured by the first camera and the third image. The output unit can output the synthetic image generated by the image synthesis unit. Here, the "housing" in the present invention typically corresponds to a box-shaped container, but preferably includes a frame-shaped structure (frame body). Furthermore, the "image" in the present invention preferably includes not only a still image but also a video.

[0122] According to the present invention, since the second imaging element has a light receiving sensitivity to the wavelength of the electromagnetic wave emitted by the electromagnetic wave transmitter, the electromagnetic wave emitted from the electromagnetic wave transmitter can be captured by the second camera.The second image capturing the electromagnetic wave emitted from the electromagnetic wave transmitter is converted into a monochrome third image, and a composite image is output by combining the first image captured by the first camera arranged at a camera position and camera angle substantially equal to those of the second camera with the third image.Therefore, even if the electromagnetic wave transmitter is an eavesdropping device that transmits electromagnetic waves at random timing, it is possible to reliably detect not only whether it is present in the space to be detected, but also where in the space to be detected the electromagnetic wave transmitter is present.

[0123] According to a further embodiment of the first electromagnetic wave transmitter detection device of the present invention, at least the second image is a moving image.

[0124] According to this embodiment, it is more suitable for application to detection of electromagnetic wave transmitters such as bugging devices that transmit electromagnetic waves corresponding to voices at random timing.

[0125] According to a further embodiment of the first electromagnetic wave transmitter detection device of the present invention, the device further includes a frame identification unit capable of identifying a frame in which the electromagnetic wave transmitter is presumed to have been captured from the second image, and an image conversion unit converts the frame into a monochrome image to generate a third image.

[0126] This embodiment is also applicable to the case where the first image is a still image.

[0127] According to a further aspect of the first electromagnetic wave transmitter detection device of the present invention, the housing is a polyhedron having a plurality of faces, and the first and second cameras are disposed on each of the plurality of faces.

[0128] According to this embodiment, images can be captured simultaneously in all directions in the space to be detected, so that the presence or absence and location of an electromagnetic wave transmitter can be detected easily, reliably, and in a short time.

[0129] According to a further embodiment of the first electromagnetic wave transmitter detection device of the present invention, the device further includes a display unit capable of displaying the composite image, and a location identification unit for identifying the location of the electromagnetic wave transmitter based on the third image, and the display unit notifies the location of the electromagnetic wave transmitter identified by the location identification unit in a manner that allows the location to be visually confirmed.

[0130] According to this embodiment, the presence or absence of an electromagnetic wave transmitter and its location can be notified more reliably.

[0131] According to a preferred embodiment of the second electromagnetic wave transmitter detection device of the present invention, the device includes at least one camera and an output unit capable of outputting an image captured by the camera. The camera includes a filter in which a visible light transmitting material capable of transmitting the wavelengths of visible light components and an electromagnetic wave transmitting material capable of transmitting the wavelengths of electromagnetic waves transmitted by the electromagnetic wave transmitter are arranged in a pattern, and an image sensor having a light receiving sensitivity equal to or higher than the wavelengths of the visible light components. In the present invention, the "image" preferably includes not only still images but also moving images.

[0132] According to the present invention, the camera has a filter in which a visible light transmitting material capable of transmitting the wavelength of the visible light component and an electromagnetic wave transmitting material capable of transmitting the wavelength of the electromagnetic wave transmitted by the electromagnetic wave transmitter are arranged in a pattern, and an image pickup element having a light receiving sensitivity equal to or higher than the wavelength of the visible light component, so that the electromagnetic wave transmitted from the electromagnetic wave transmitter can be captured in the image of the space to be detected captured by the camera. As a result, even if the electromagnetic wave transmitter is an electromagnetic wave transmitter such as a wiretap that transmits electromagnetic waves at random timing, it is possible to reliably detect not only whether it is present in the space to be detected, but also where in the space to be detected the electromagnetic wave transmitter is present.

[0133] According to a further embodiment of the second electromagnetic wave transmitter detection device of the present invention, the image is a moving image.

[0134] According to this embodiment, it is more suitable for application to detection of electromagnetic wave transmitters such as bugging devices that transmit electromagnetic waves corresponding to voices at random timing.

[0135] According to a further embodiment of the second electromagnetic wave transmitter detection device of the present invention, the device further includes a housing capable of supporting a camera. The housing is a polyhedron having a plurality of faces. The camera is disposed on each of the plurality of faces.

[0136] According to this embodiment, images can be captured simultaneously in all directions in the space to be detected, so that the presence or absence and location of an electromagnetic wave transmitter can be detected easily, reliably, and in a short time.

[0137] According to a further embodiment of the second electromagnetic wave transmitter detection device of the present invention, the device further includes a display unit capable of displaying an image, and a location identification unit for identifying the location of the electromagnetic wave transmitter based on the image, and the display unit notifies the location of the electromagnetic wave transmitter identified by the location identification unit in a manner that allows the location to be visually confirmed.

[0138] According to this embodiment, the presence or absence of an electromagnetic wave transmitter and its location can be notified more reliably.

[0139] According to a preferred embodiment of the first electromagnetic wave transmitter detection method of the present invention, the method includes the steps of (a) arranging at least one first camera having a first image sensor having a light sensitivity to the wavelength of a visible light component and at least one second camera having a second image sensor having a light sensitivity to the wavelength of an electromagnetic wave emitted by an electromagnetic wave transmitter so that the camera positions and angles are substantially equal, (b) imaging the space to be detected by the first and second cameras, (c) converting the second image captured by the second camera into a monochrome third image, (d) generating a composite image by combining the first image captured by the first camera and the third image, and (e) outputting the generated composite image. Here, the "image" in the present invention preferably includes not only a still image but also a moving image.

[0140] According to the present invention, since the second imaging element has a light receiving sensitivity to the wavelength of the electromagnetic wave emitted by the electromagnetic wave transmitter, the electromagnetic wave emitted from the electromagnetic wave transmitter can be captured by the second camera.The second image capturing the electromagnetic wave emitted from the electromagnetic wave transmitter is converted into a monochrome third image, and a composite image is output by combining the first image captured by the first camera arranged at a camera position and camera angle substantially equal to those of the second camera with the third image.Therefore, even if the electromagnetic wave transmitter is an eavesdropping device that transmits electromagnetic waves at random timing, it is possible to reliably detect not only whether it is present in the space to be detected, but also where in the space to be detected the electromagnetic wave transmitter is present.

[0141] According to a further embodiment of the first electromagnetic wave transmitter detection method of the present invention, step (b) includes the step of capturing at least the second image as a moving image.

[0142] According to this embodiment, it is more suitable for application to detection of electromagnetic wave transmitters such as bugging devices that transmit electromagnetic waves corresponding to voices at random timing.

[0143] According to a preferred embodiment of the second electromagnetic wave transmitter detection method of the present invention, the method includes (f) a step of capturing an image of the space to be detected by at least one camera equipped with a filter in which a visible light transmitting material capable of transmitting the wavelength of the visible light component and an electromagnetic wave transmitting material capable of transmitting the wavelength of the electromagnetic wave transmitted by the electromagnetic wave transmitter are arranged in a pattern, and an image sensor having a light receiving sensitivity equal to or higher than the wavelength of the visible light component, and (g) a step of outputting the image of the space to be detected captured by the camera. Here, the "image" in the present invention preferably includes not only a still image but also a moving image.

[0144] According to the present invention, a camera having a filter in which a visible light transmitting material capable of transmitting the wavelength of a visible light component and an electromagnetic wave transmitting material capable of transmitting the wavelength of an electromagnetic wave transmitted by an electromagnetic wave transmitter are arranged in a pattern, and an image sensor having a light receiving sensitivity equal to or higher than the wavelength of a visible light component is used to image the space to be detected, so that the electromagnetic waves transmitted from the electromagnetic wave transmitter can be imaged in the image of the space to be detected. As a result, even if an electromagnetic wave transmitter such as a wiretap that transmits electromagnetic waves at random timing is present in the space to be detected, it is possible to reliably detect not only whether the electromagnetic wave transmitter is present in the space to be detected, but also where the electromagnetic wave transmitter is present in the space to be detected.

[0145] According to a further embodiment of the second electromagnetic wave transmitter detection method of the present invention, the step (f) includes at least the step of capturing the image as a moving image.

[0146] According to this embodiment, it is more suitable for application to detection of electromagnetic wave transmitters such as bugging devices that transmit electromagnetic waves corresponding to voices at random timing.

[0147] According to a preferred embodiment of the first electromagnetic wave transmitter detection program of the present invention, at least steps (b) to (e) of any of the above-mentioned electromagnetic wave transmitter detection methods of the present invention are executed by a computer. The program may be recorded on a computer-readable recording medium, such as a hard disk, a ROM, an SSD, a flash memory (USB memory, SD card, etc.), a floppy disk, a CD, a DVD, etc., or may be distributed from one computer to another computer via a transmission medium, such as a communication network such as the Internet or a LAN, or may be transmitted and received in any other manner.

[0148] According to the present invention, it is possible to achieve effects similar to those achieved by the electromagnetic wave transmitter detection method of the present invention described above, such as the effect of being able to reliably detect not only whether or not an electromagnetic wave transmitter, such as a bugging device that transmits electromagnetic waves at random timing, is present in the space to be detected, but also where in the space to be detected the electromagnetic wave transmitter is located.

[0149] According to a preferred embodiment of the second electromagnetic wave transmitter detection program of the present invention, a computer is caused to execute any one of the electromagnetic wave transmitter detection methods of the present invention described above. The program may be recorded on a computer-readable recording medium, such as a hard disk, a ROM, an SSD, a flash memory (such as a USB memory or an SD card), a floppy disk, a CD, or a DVD, or may be distributed from one computer to another computer via a transmission medium, such as a communication network such as the Internet or a LAN, or may be transmitted and received in any other manner.

[0150] According to the present invention, it is possible to achieve effects similar to those achieved by the electromagnetic wave transmitter detection method of the present invention described above, such as the effect of being able to reliably detect not only whether or not an electromagnetic wave transmitter, such as a bugging device that transmits electromagnetic waves at random timing, is present in the space to be detected, but also where in the space to be detected the electromagnetic wave transmitter is located. [Explanation of symbols]

[0151] 1. Electromagnetic wave transmitter detection device (electromagnetic wave transmitter detection device of Example 1) 2 Camera 4. Chassis (chassis) 6 Support legs 10 Visible light video camera (first camera) 12 Lenses 13 Color Filter 14 Image sensor (first image sensor) 16 Image Processing Engine 18 Video output terminal 20 Recording media 22 Audio receiving section 24 LCD monitor 26. Finder 28 Camera Body 30 Electromagnetic Video Camera (Second Camera) 32 Lens 34 Image sensor (second image sensor) 36 Image Processing Engine 38 Video output terminal 44 Camera Body 46 Bandpass Filter 50 PC 52 Display 61 Visible light video acquisition unit 62 Electromagnetic wave video acquisition unit 63 Video conversion unit (image conversion unit) 64 Video composition section (image composition section) 65 Location identification part (frame identification part, location identification part) 66 Memory section 67 Output section (output section) 68 Display section (display section) 80 Adapter 82 Cable 100 Electromagnetic wave transmitter detection device (electromagnetic wave transmitter detection device of Example 2) 102 Camera 110 Video camera (camera) 112 Lens 113 Filter (Filter) 114 Image sensor (imaging element) 116 Image Processing Engine 118 Video output terminal 120 Recording Media 122 Audio receiving unit 124 Camera Body 161 Video Acquisition Unit 200 Detection device (electromagnetic wave reflecting object detection device of Example 3)

Claims

1. A bugging device detection device for detecting a bug, A housing and At least one first camera including a first image sensor having light receiving sensitivity to a wavelength of a visible light component and disposed in the housing; At least one second camera having a second image sensor having a light receiving sensitivity set in accordance with the frequency of the electromagnetic waves emitted by the bugging device and disposed on the housing so as to have a camera position and a camera angle substantially equal to those of the first camera; an image conversion unit capable of converting a second image captured by the second camera into a monochrome third image; an image synthesis unit that generates a synthetic image by overlaying the third image on the first image captured by the first camera; an output unit capable of outputting the composite image generated by the image synthesis unit, the third image is an image which is converted so that a portion where the intensity of the detected electromagnetic wave is zero is transparent and a density of a predetermined monochromatic color is darkened according to the intensity of the detected electromagnetic wave, a predetermined minimum value and a maximum value are set for the intensity of the electromagnetic wave, and all portions where the intensity of the detected electromagnetic wave is equal to or less than the minimum value are transparent, and all portions where the intensity of the detected electromagnetic wave is equal to or more than the maximum value are the maximum density of the density range of the monochromatic color; Eavesdropping detection device.

2. A display unit capable of displaying the composite image; a location identification unit that identifies the location of the bugging device based on the third image; Further equipped with The display unit notifies the location of the bugging device identified by the location identification unit in a manner that allows the location to be visually confirmed.

2. The bugging device detection device according to claim 1.

3. A bugging device detection device for detecting a bug, At least one camera including a filter in which a visible light transmitting material capable of transmitting a wavelength of a visible light component and an electromagnetic wave transmitting material capable of transmitting a wavelength set in accordance with the frequency of the electromagnetic wave emitted by the eavesdropping device are arranged in a pattern, and an image sensor having a light receiving sensitivity to the wavelength transmitted by the filter; an image conversion unit capable of converting an image captured by the camera into a monochrome converted image with a monochrome tone; an image synthesis unit that generates a synthetic image by overlaying the monochrome converted image on the image captured by the camera; an output unit capable of outputting the composite image generated by the image synthesis unit, The monochrome converted image is an image converted so that a portion where the intensity of the sensed electromagnetic wave is zero is transparent and a predetermined monochromatic density is darkened according to the intensity of the sensed electromagnetic wave, a predetermined minimum value and a maximum value are set for the intensity of the electromagnetic wave, and all portions where the intensity of the sensed electromagnetic wave is equal to or less than the minimum value are transparent, and all portions where the intensity of the sensed electromagnetic wave is equal to or greater than the maximum value are the maximum density of the monochromatic density range. Eavesdropping detection device.

4. A display unit capable of displaying the composite image; a location identification unit that identifies the location of the bugging device based on the monochrome converted image; Further equipped with The display unit notifies the location of the bugging device identified by the location identification unit in a manner that allows the location to be visually confirmed.

4. The bugging device detection device according to claim 3.

5. A method for detecting a bugging device, comprising: (a) arranging at least one first camera having a first image sensor having a light sensitivity to a wavelength of a visible light component and at least one second camera having a second image sensor having a light sensitivity set in accordance with the frequency of an electromagnetic wave emitted by the bugging device, so that the camera positions and camera angles are approximately equal; (b) imaging a space to be detected by the first and second cameras; (c) converting the second image captured by the second camera into a monochrome third image; (d) generating a composite image by overlaying the third image on the first image captured by the first camera; (e) outputting the generated composite image; the third image is an image which is converted so that a portion where the intensity of the detected electromagnetic wave is zero is transparent and a density of a predetermined monochromatic color is darkened according to the intensity of the detected electromagnetic wave, a predetermined minimum value and a maximum value are set for the intensity of the electromagnetic wave, and all portions where the intensity of the detected electromagnetic wave is equal to or less than the minimum value are transparent, and all portions where the intensity of the detected electromagnetic wave is equal to or more than the maximum value are the maximum density of the density range of the monochromatic color; How to detect eavesdropping devices.

6. The step (b) includes a step of capturing at least the second image as a moving image. The method for detecting a bugging device according to claim 5.

7. A bugging device detection program for detecting a bugging device, 7. A bugging device detection program for causing a computer to execute at least the steps (b) to (e) of the bugging device detection method according to claim 5 or 6.

8. A method for detecting a bugging device, comprising: (f) capturing an image of the space to be detected by at least one camera having a filter in which a visible light transmitting material capable of transmitting the wavelength of a visible light component and an electromagnetic wave transmitting material capable of transmitting a wavelength set in accordance with the frequency of the electromagnetic wave emitted by the eavesdropping device are arranged in a pattern, and an image sensor having a light receiving sensitivity to the wavelength transmitted by the filter; (g) converting the image captured by the camera into a monochrome converted image; (h) generating a composite image by overlaying the monochrome converted image on an image captured by the camera; (i) outputting the generated composite image; The monochrome converted image is an image converted so that a portion where the intensity of the sensed electromagnetic wave is zero is transparent and a predetermined monochromatic density is darkened according to the intensity of the sensed electromagnetic wave, a predetermined minimum value and a maximum value are set for the intensity of the electromagnetic wave, and all portions where the intensity of the sensed electromagnetic wave is equal to or less than the minimum value are transparent, and all portions where the intensity of the sensed electromagnetic wave is equal to or greater than the maximum value are the maximum density of the monochromatic density range. How to detect eavesdropping devices.

9. The step (f) includes at least a step of capturing the image as a video. The method for detecting a bug according to claim 8.

10. A bugging device detection program for detecting a bugging device, A bugging device detection program for causing a computer to execute the bugging device detection method according to claim 8 or 9.

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