An imaging luminance meter based on a mobile device

Abstract

The present invention relates to an imaging luminance meter based on a mobile device, which comprises a mobile device and a CCD measurement module. The mobile device includes a camera assembly, a wireless receiving module and an image processing module. The image processing module is connected to the camera assembly and the wireless receiving module. The CCD measurement module includes a housing, a lens, a CCD photosensitive sensor, a wireless transmitting module, a semi-transmissive and semi-reflective glass and a shooting window. The housing is of a rectangular box structure. The semi-transmissive and semi-reflective glass is vertically inclined in the housing, dividing the housing into a first space and a second space. The first space includes two mutually perpendicular first side walls and a second side wall. The lens is arranged on the first side wall, and the shooting window is arranged on the second side wall. The CCD photosensitive sensor is installed in the second space. Compared with the prior art, the present invention simplifies the structure and has a low cost; greatly improves the convenience of use of the CCD luminance meter and is suitable for the daily use of ordinary people.

Description

Technical Field

[0001] The present invention relates to the technical field of imaging luminance meters, and more particularly to an imaging luminance meter based on a mobile device. Background Art

[0002] Using a luminance meter for photometric measurement is the current mainstream measurement method. Research on photometric testing by photography has been carried out since the 1930s. Since it can obtain very rich information in a relatively short time, it has been widely used in fields such as astronomical observation and image mapping. A CCD camera is a commonly used luminance meter. CCD (Charge coupled Device) refers to a charge-coupled device, which is a new type of semiconductor device developed in the early 1970s. It uses the amount of charge to represent the signal size and uses a coupling method to transmit signals. It has a series of advantages such as self-scanning, a wide spectral range of sensing, small distortion, small volume, light weight, low system noise, low power consumption, long life, and high reliability, and can be made into a highly integrated assembly. Thus, a CCD camera can quickly capture an image, convert it into a digital electronic image, and perform brightness and colorimetry tests. However, CCD cameras are highly professional and expensive, and are not suitable for ordinary daily use by people. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide an imaging luminance meter based on a mobile device.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] An imaging luminance meter based on a mobile device, comprising a mobile device and a CCD measurement module. The mobile device includes a camera assembly, a wireless receiving module, and an image processing module. The image processing module is connected to the camera assembly and the wireless receiving module. The CCD measurement module includes a housing, a lens, a CCD photosensitive sensor, a wireless transmitting module, a semi-transmissive semi-reflective glass, and a shooting window. The housing is a rectangular box structure. The semi-transmissive semi-reflective glass is vertically inclined in the housing, dividing the housing into a first space and a second space. The first space includes two mutually perpendicular first side walls and second side walls. The lens is disposed on the first side wall, and the shooting window is disposed on the second side wall. The CCD photosensitive sensor is installed in the second space.

[0006] Further, suction cups are provided on both sides of the shooting window. The CCD measurement module is connected to the mobile device through the suction cups, and the shooting window faces the camera assembly.

[0007] Further, the photographing window includes a connecting pipe that protrudes outward. One end of the connecting pipe is connected to the housing, and the other end is provided with a buffer edge.

[0008] Further, the connecting pipe is a tapered pipe, and the diameter of the end provided with the buffer edge is smaller than the diameter of the end connected to the housing.

[0009] Further, the buffer edge is a rubber or sponge edge.

[0010] Further, after the CCD measurement module is connected to the mobile device through a suction cup, the buffer edge is compressed, and the buffer edge of the connecting pipe contacts the mobile device, so that the internal through hole of the connecting pipe is aligned with the lens of the camera assembly.

[0011] Further, the inclination angle of the semi-transmissive and semi-reflective glass is 45°.

[0012] Further, both the wireless receiving module and the wireless transmitting module are Bluetooth modules or wifi modules.

[0013] Further, the camera assembly of the mobile device includes an anti-shake gimbal.

[0014] Further, the mobile device is a mobile phone, a tablet computer or a laptop computer.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention cooperates with an existing intelligent mobile device through a CCD measurement module. Only a CCD photosensitive sensor and a semi-transmissive and semi-reflective glass need to be arranged in the CCD measurement module, which simplifies the structure and has a low cost. Then, the camera assembly and the processor of the intelligent mobile device itself are used for brightness measurement and calculation, greatly improving the convenience of use of the CCD luminance meter and being suitable for daily use by ordinary people.

[0017] 2. A suction cup is provided on the housing of the CCD measurement module, which is convenient for connecting the mobile device for brightness measurement.

[0018] 3. A connecting pipe is provided on the housing, so that a certain distance is formed between the camera assembly of the mobile device and the photographing window of the CCD measurement module, which is convenient for focusing the camera and improves the adaptability of the camera assembly. At the same time, the buffer edge on the connecting pipe can play a role in sealing, shading and buffering, improving the stability of measurement imaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the structure of the CCD measurement module.

[0021] 1. Mobile device, 11. Camera assembly, 12. Wireless receiving module, 13. Image processing module, 2. CCD measurement module, 21. Housing, 211. First space, 212. Second space, 213. First side wall, 214. Second side wall, 22. Lens, 23. CCD photosensitive sensor, 24. Wireless transmitting module, 25. Half-transmissive and half-reflective glass, 26. Shooting window, 27. Suction cup, 28. Connecting pipe, 29. Buffer edging. Detailed implementation mode

[0022] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and gives detailed implementation methods and specific operation processes, but the protection scope of the present invention is not limited to the following embodiments.

[0023] As Figure 1 shown, this embodiment provides an imaging luminance meter based on a mobile device, including a mobile device 1 and a CCD measurement module 2. The mobile device 1 can be a common existing intelligent mobile terminal, such as a mobile phone, a tablet computer, and a computer. In this embodiment, a mobile phone is taken as an example. The mobile device 1 includes a camera assembly 11, a wireless receiving module 12, and an image processing module 13. The image processing module 13 is connected to the camera assembly 11 and the wireless receiving module 12, that is, the mobile phone includes a camera, a Bluetooth receiving module, and a processing chip that are connected to each other. As Figure 2 shown, the CCD measurement module 2 includes a housing 21, a lens 22, a CCD photosensitive sensor 23, a wireless transmitting module 24, a half-transmissive and half-reflective glass 25, and a shooting window 26. The housing 21 is a rectangular box structure. The half-transmissive and half-reflective glass 25 is vertically inclined in the housing 21 at an inclination angle of 45°, dividing the housing 21 into a first space 211 and a second space 212. The first space 211 includes two mutually perpendicular first side walls 213 and second side walls 214. The lens 22 is arranged on the first side wall 213, and the shooting window 26 is arranged on the second side wall 214. The CCD photosensitive sensor 23 is installed in the second space 212. Suction cups 27 are arranged on both sides of the shooting window 26. The CCD measurement module 2 is connected to the mobile device 1 through the suction cups 27, and the shooting window 26 faces the camera assembly 11. The shooting window 26 includes a protruding connecting pipe 28 and is a conical structure. The end with a smaller diameter is provided with a buffer edging 29, and the end with a larger diameter is connected to the housing 21. The buffer edging 29 is generally a rubber or sponge edging, preferably a rubber edging. After the CCD measurement module 2 is connected to the mobile device 1 through the suction cups 27, the buffer edging 29 is compressed, and the buffer edging 29 of the connecting pipe 28 contacts the mobile device 1, so that the internal through hole of the connecting pipe 28 is aligned with the lens of the camera assembly 11.

[0024] In this embodiment, the connection tube 28 is provided so that the camera assembly 11 of the mobile device 1 and the shooting window 26 of the CCD measurement module 2 form a certain distance, which is convenient for the focus adjustment of the camera and improves the adaptability of the camera assembly 11; at the same time, the buffer edge 29 on the connection tube 28 can play the role of sealing, shading and buffering, and improve the stability of the measurement imaging. The camera assembly 11 of the mobile device 1 can also include an anti-shake gimbal to further improve the imaging stability.

[0025] The working principle of this embodiment is as follows: when in use, align the connecting tube 28 of the CCD measuring module 2 with the camera assembly 11 of the mobile phone, and then assemble the CCD measuring module 2 and the mobile phone by sucking together the suction cup 27. A software program that can receive data from the CCD photosensor 23 is preinstalled in the mobile phone, so that the CCD photosensor 23 can send data to the mobile device 1 via Bluetooth. The software can also call the camera assembly 11 to take pictures. When shooting, align the lens 22 of the CCD photosensor 23 with the object to be measured, and the emitted light of the object to be measured will enter the CCD measuring module 2 through the lens 22. In the CCD measuring module 2, a part of the light passes through the semi-transmissive and semi-reflective glass 25 and is projected onto the CCD photosensor 23. In the CCD photosensor 23, the optical image is formed through photoelectric conversion, and the light information is converted into a charge amount proportional to the light intensity. The pixel collection is completed through the shift storage circuit and sent to an ARM processing unit. Finally, the collected image signal is transmitted to the image processing module 13 of the mobile device 1 through the Bluetooth sending module. The other part of the light is reflected by the semi-transmissive and semi-reflective glass 25 and irradiates the camera assembly 11. When the camera assembly 11 is working, the sensor inside the camera assembly 11 generates electric charge when exposed to light, converts the light signal into an electric signal, and then the electric signal is converted into a digital signal through digital-to-analog conversion, and finally transmitted to the image processing module 13 of the mobile phone. In the image processing module 13, the signals of the two parts of light are superimposed, that is, the brightness value of the image transmitted by the CCD measurement module 2 is used as an instant calibration parameter to calibrate the brightness value of the image captured by the mobile device 1, thereby obtaining the current image brightness.

[0026] In this embodiment, the CCD measurement module 2 and the existing smart mobile device 1 cooperate with each other. Only a CCD photosensor 23 and a transmissive semi-reflective glass need to be set in the CCD measurement module 2, which simplifies the structure and reduces the cost. Then, the camera component 11 and the processor of the smart mobile device 1 are used to calculate the brightness, which greatly reduces the use threshold of the CCD brightness meter and is suitable for daily use by ordinary people.

[0027] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field according to the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art shall fall within the protection scope determined by the claims.

Claims

1. An imaging luminance meter based on a mobile device, characterized in that, It includes a mobile device (1) and a CCD measurement module (2). The mobile device (1) includes a camera assembly (11), a wireless receiving module (12), and an image processing module (13). The image processing module (13) is connected to the camera assembly (11) and the wireless receiving module (12). The CCD measurement module (2) includes a housing (21), a lens (22), a CCD photosensitive sensor (23), a wireless transmitting module (24), a semi-transmissive and semi-reflective glass (25), and a shooting window (26). The housing (21) is a rectangular box structure. The semi-transmissive and semi-reflective glass (25) is vertically inclined in the housing (21), dividing the housing (21) into a first space (211) and a second space (212). The first space (211) includes two mutually perpendicular first side walls (213) and second side walls (214). The lens (22) is arranged on the first side wall (213), and the shooting window (26) is arranged on the second side wall (214). The CCD photosensitive sensor (23) is installed in the second space (212). The inclination angle of the semi-transmissive and semi-reflective glass (25) is 45°; Suction cups (27) are provided on both sides of the shooting window (26). The CCD measurement module (2) is connected to the mobile device (1) through the suction cups (27), and the shooting window (26) faces the camera assembly (11); The shooting window (26) includes an outwardly convex connecting pipe (28). One end of the connecting pipe (28) is connected to the housing (21), and the other end is provided with a buffer edge (29); After the CCD measurement module (2) is connected to the mobile device (1) through the suction cups (27), the buffer edge (29) is compressed, and the buffer edge (29) of the connecting pipe (28) contacts the mobile device (1), so that the internal through hole of the connecting pipe (28) faces the lens of the camera assembly (11); The image processing module (13) is used to receive the signals of the CCD measurement module (2) and the camera assembly (11), superimpose the signals of the two parts of light, and use the brightness value of the image transmitted by the CCD measurement module (2) as an instant calibration parameter to calibrate the brightness value of the image taken by the camera assembly (11) to obtain the current image brightness.

2. The imaging luminance meter based on a mobile device according to claim 1, wherein The connecting pipe (28) is a tapered pipe, and the diameter of the end provided with the buffer edge (29) is smaller than the diameter of the end connecting the housing (21).

3. The imaging luminance meter based on a mobile device according to claim 1, wherein The buffer edge (29) is a rubber or sponge edge.

4. The imaging luminance meter based on a mobile device according to claim 1, characterized in that, The inclination angle of the semi-transmissive and semi-reflective glass (25) is 45°.

5. The imaging luminance meter based on a mobile device according to claim 1, characterized in that, Both the wireless receiving module (12) and the wireless transmitting module (24) are Bluetooth modules or wifi modules.

6. The imaging luminance meter based on a mobile device according to claim 1, characterized in that, The camera assembly (11) of the mobile device (1) includes an anti-shake gimbal.

7. The imaging luminance meter based on a mobile device according to claim 1, wherein The mobile device (1) is a mobile phone, a tablet computer, or a laptop computer.

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