Image processing apparatus and image processing system

Abstract

To provide an image processing apparatus and an image processing system capable of composing a plurality of images in a form along a request of a user and displaying it on a single screen.SOLUTION: A composition processing unit transmits a first image included in a designated area within a screen so as to dispose the first image based on a first image signal within a screen and so as to dispose a second image based on a second image signal different from the first image signal within the screen and composes the first image and the second image to generate a composite image signal. A memory stores transmission control data which specifies the designated area and indicates the transmission mode of the first image in the designated area.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a video processing device that combines a plurality of video signals, and a video processing system that includes the video processing device. [Background technology]

[0002] Currently, image processing systems are being commercialized as electronic devices that provide driving assistance for vehicles. These systems use multiple cameras to capture images of the front, rear, and sides of the vehicle, and then combine the images captured by each camera and display them on a display mounted on the dashboard or in the rearview mirror.

[0003] As such an image processing system, a display control device has been proposed that captures the rear, right rear, and left rear of the vehicle with separate cameras, and displays a wide-range rear image on the rearview mirror by seamlessly synthesizing each captured image (see Figs. 26 and 27 of Patent Document 1). This display control device detects parts of the synthesized image that are less important for driving operations, and applies "blurring processing" to those parts to increase the visibility of parts that are more important.

[0004] As an image processing system as described above, a blind spot image display device has been proposed that uses two cameras mounted on the left and right corners of the vehicle's front bumper to capture images of blind spots on the right and left sides of the vehicle, and displays one image on the right half of an in-vehicle monitor screen and the other image on the left half of the screen (see, for example, Patent Document 2). With this blind spot image display device, the driver can check the scenery of two different blind spots (the right and left sides of the vehicle) by looking at the screen of the in-vehicle monitor. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] WO2019 / 111307 publication [Patent Document 2] JP 2003-127772 A Summary of the Invention [Problem to be solved by the invention]

[0006] Incidentally, the two captured images described in Patent Document 2 are captured from the vehicle at the same time, and therefore may have similar patterns, brightness, and color tones. Therefore, when two discontinuous captured images are connected and displayed on one screen, as in the blind spot image display device described in Patent Document 2, the boundaries between the captured images become unclear.

[0007] Furthermore, when multiple captured images for such driving assistance are linked and displayed on one screen, it is desirable to be able to change the display size of each captured image.

[0008] SUMMARY OF THE PRESENT DISCLOSURE An object of the present invention is to provide an image processing device and an image processing system that are capable of displaying a plurality of images in a format that meets the needs of a user when synthesizing the images and displaying them on a single screen. [Means for solving the problem]

[0009] The video processing device of the present invention includes a synthesis processing unit that generates a synthetic video signal by synthesizing the first video and the second video by making the first video included in a designated area of ​​the screen transparent so as to place a first video based on a first video signal within the screen and place a second video based on a second video signal different from the first video signal within the screen, and a memory that identifies the designated area and stores transparency control data indicating the transparency state of the first video in the designated area.

[0010] The video processing system of the present invention includes a first camera that outputs a first video signal representing a captured image, a second camera that outputs a second video signal representing the captured image, a display device having a single screen, a synthesis processing unit that arranges a first image based on the first video signal within the screen and arranges a second image based on a second video signal different from the first video signal within the screen, and generates a synthesized video signal by synthesizing the first image and the second image by making the first image included in a designated area within the screen transparent so as to arrange the second image within the screen, a memory that stores transparency control data that identifies the designated area and indicates the transparency state of the first image in the designated area, and a data change control unit that overwrites the transparency control data stored in the memory with the transparency control data for rewriting when it receives transparency control data for rewriting and a data change command. Effect of the Invention

[0011] In the present invention, in order to display a first video based on a first video signal on a screen and to arrange and display a second video based on a second video signal in a designated area of ​​the screen, a composite signal is generated by combining the first and second videos as follows: That is, the designated area is specified and transparency control data indicating the transparency state of the first video in the designated area is stored in a memory, and a composite video signal is generated by combining the first video and the second video by making the first video included in the designated area on the screen transparent according to the transparency control data read from the memory.

[0012] According to this configuration, by changing the contents of the transparency control data stored in the memory, it is possible to change the size of the second image to be displayed in a specified area within the screen on which the above-mentioned first image is displayed, and the shape of the boundary between the first and second images to suit the user's requirements. [Brief description of the drawings]

[0013] [Figure 1] 1 is a block diagram showing a configuration of an image processing system 100 as a first embodiment of the image processing system according to the present invention. [Diagram 2] FIG. 2 is a diagram showing an example of installation positions of cameras 10a and 10b and a display device 30 in a vehicle. [Figure 3A] 3 is a diagram showing an example of the screen form of a display device 30. FIG. [Figure 3B] 1 is a diagram showing an example of the form of an image area fa cut out from an image Fa shown in a captured video signal Va. FIG. [Figure 3C] 1 is a diagram showing an example of the form of an image area fb cut out from an image Fb shown in a captured image signal Vb. [Figure 4] FIG. 2 is a diagram showing an example of a data format of transparency control data TD. [Diagram 5] 13 is a diagram showing the manner in which images GA and GB are synthesized by the synthesis processing unit 23. FIG. [Figure 6] 5 is a diagram showing a display form of images GA and GB compositely displayed on the screen of a display device 30 based on the transparency control data TD shown in FIG. 4. FIG. [Figure 7] FIG. 2 is a diagram showing an example of a data format of transparency control data TD. [Figure 8] 8 is a diagram showing a display form of images GA and GB that are compositely displayed on the screen of a display device 30 based on the transparency control data TD shown in FIG. 7. [Figure 9A] 13 is a diagram showing another example of the display form of the images GA and GB compositely displayed on the screen of the display device 30. FIG. [Figure 9B] 13 is a diagram showing yet another example of the display form of the images GA and GB compositely displayed on the screen of the display device 30. FIG. [Figure 10] FIG. 1 is a block diagram showing a configuration of an image processing system 100 as a second embodiment of the image processing system according to the present invention. [Figure 11A] FIG. 13 is a diagram illustrating an example of transparency control data OSD. [Figure 11B] 13 is a diagram showing an example of a video signal VTd in which a "00h" area representing black is added as a transparent area to a video signal VTb representing a video GB. [Figure 11C]1 is a diagram showing a display image obtained by connecting an image GB represented by a video signal VTd and an image GA represented by a video signal VTa. [Figure 12] FIG. 2 is a diagram showing an example of the configuration of a board module that realizes a video processing device 20 (20A). [Figure 13] FIG. 13 is a diagram showing another example of the configuration of a board module that realizes the video processing device 20 (20A). [Figure 14] 14 is a diagram showing a modified example of the configuration of the substrate module shown in FIG. 13. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS EXAMPLES

[0014] FIG. 1 is a block diagram showing a configuration of an image processing system 100 mounted on a vehicle, as an example of an image processing system according to the present invention.

[0015] The image processing system 100 includes cameras 10 a and 10 b, an image processing device 20 , and a display device 30 .

[0016] The camera 10a is installed at the rear of the vehicle, for example, as shown in FIG. 2, outputs a captured video signal Va representing an image captured behind the vehicle, and supplies this to the video processing device 20.

[0017] The camera 10b is installed on the left side mirror Ms of the vehicle as shown in FIG. 2, for example, and outputs a captured image signal Vb representing an image captured on the left rear of the vehicle.

[0018] The operation device 11 is, for example, a smartphone, and wirelessly transmits to the video processing device 20 rewrite transparent control data generated by a user operation and a data change command for prompting a change to the rewrite transparent control data.

[0019] The video processing device 20 includes trimming units 21a and 21b, a memory 22, a synthesis processing unit 23, and a data change control unit 24.

[0020] The trimming unit 21a cuts out an image area having the same aspect ratio and number of dots as the screen of the display device 30 from the image of the rear of the vehicle represented by the captured image signal Va.

[0021] For example, the screen of the display device 30 may be as shown in FIG. Horizontal: W (W is an integer) dots Vertical: Y (Y is an integer) dots 3B, the trimming unit 21a cuts out an image area fa of W dots in the horizontal direction and Y dots in the vertical direction from an image Fa represented by the photographed image signal Va. Then, the trimming unit 21a supplies a video signal in the photographed image signal Va, which represents an image GA in the image area fa, to the synthesis processing unit 23 as a video signal VTa.

[0022] The trimming unit 21b cuts out an image area from the image of the left rear of the vehicle shown in the captured video signal Vb, the image area having a predetermined number of dots in the horizontal direction and a number of dots in the vertical direction equal to the number of dots in the vertical direction on the screen of the display device 30.

[0023] 3C, the trimming unit 21b cuts out an image area fb of X (X is an integer equal to or less than W) dots in the horizontal direction and Y dots in the vertical direction from an image Fb represented by the photographed image signal Vb. Then, the trimming unit 21b supplies a video signal in the photographed image signal Vb, which represents the image GB in the image area fb, to the synthesis processing unit 23 as a video signal VTb.

[0024] The memory 22 is a non-volatile semiconductor memory such as a flash memory, and stores therein transparency control data TD used when synthesizing the video signal VTa and the video signal VTb in a transparent manner.

[0025] FIG. 4 is a diagram showing an example of a format of the transparency control data TD.

[0026] The transparency control data TD is composed of (W×Y) dot data pieces that represent the transparency of each dot for each dot on the screen (1st row to Yth row×1st column to Wth column) of the display device 30 shown in FIG. 3A. Each dot data piece represents the transparency of the video signal VTa when the video signals VTa and VTb are transparently combined, and in the example shown in FIG. 4, the transparency is represented by 4 bits (hexadecimal notation). For example, when the dot data piece represents "F", the transparency is 100%, when it represents "8", the transparency is 50%, and when it represents "0", the transparency is 0%. At the time of factory shipment, the transparency control data TD in the initial state having the contents shown in FIG. 4, for example, is stored as the transparency control data recommended by the manufacturer.

[0027] The memory 22 reads out the above-mentioned transparency control data TD in response to power-on, and supplies this to the synthesis processing unit 23 .

[0028] When the data change control unit 24 receives the transparent control data for rewriting and a data change command wirelessly transmitted from the operation device 11, it updates the transparent control data by performing a write access to the memory 22 to overwrite the contents of the transparent control data stored in the memory 22 with the received transparent control data for rewriting.

[0029] The synthesis processing unit 23 synthesizes the video signal VTa and the video signal VTb in a form in which the video signal VTa is transmitted at a transmittance based on the transmission control data TD, and generates a synthesized video signal VMX.

[0030] For example, in an area where the dot data piece indicated by the transparency control data TD represents "F", the transmittance of the video signal VTa is 100%, so the synthesis processing unit 23 uses the video signal VTb as it is as the synthesized video signal VMX. Also, in an area where the dot data piece represents "8", the transmittance of the video signal VTa is 50%, so the synthesis processing unit 23 synthesizes the video signal VTa with the video signal VTb in a form where the transmittance of the video signal VTa is 50%, so that it becomes the synthesized video signal VMX. Also, in an area where the dot data piece represents "0", the transmittance of the video signal VTa is 0%, that is, it is non-transparent, so the synthesis processing unit 23 uses the video signal VTa as it is as the synthesized video signal VMX.

[0031] The display device 30 is, for example, an electronic rear-view mirror attached to the interior of a vehicle as shown in Fig. 2, and has a horizontally elongated two-dimensional screen similar to that of the electronic rear-view mirror as shown in Fig. 3A. Based on the composite video signal VMX, the display device 30 displays an image GA of the rear of the vehicle captured by the camera 10a on its own screen as shown in Fig. 6, and displays an image GB of the left rear of the vehicle captured by the camera 10b in a designated area designated at the left edge of the screen.

[0032] Incidentally, in the video processing device 20, the size of the video GB displayed within the screen of the display device 30 and the shape of the boundary between the videos GA and GB can be set according to the contents of the transparency control data TD.

[0033] For example, in the transparency control data TD shown in Fig. 4, each dot data piece in the area of ​​1st row to Yth row by (X+1)th column to Wth column where the video GA is displayed on the screen of the display device 30 is "0", which represents a transmittance of 0%. Also, in the transparency control data TD shown in Fig. 4, each dot data piece in the area where the video GB is synthesized (the area surrounded by the dashed and dotted line) is "F", which represents a transmittance of 100%, or "0", which represents a transmittance of 0%. That is, in the rectangular area surrounded by the dashed and dotted line in Fig. 4, each dot data piece included in the area surrounded by the concave arc line at the lower right corner represents "0", and all dot data pieces included in other areas represent "F".

[0034] In the transparency control data TD shown in Fig. 4, the area (designated area) in which the video GB is to be displayed on the screen of the display device 30 is designated by a dot data piece indicating "F" that represents a transmittance of 100. That is, as shown in Fig. 5, the video GB is synthesized within [row 1 to row Y] x [row 1 to column X], and as shown in Fig. 6, the video GB is displayed in the designated area corresponding to the dot data piece group having "F" that represents a transmittance of 100. At this time, the boundary br between the videos GA and GB is linear from the top to the center of the screen, and is curved in the section from the center to the bottom.

[0035] Depending on the content of the transparency control data TD, it is also possible to make the boundary between the images GA and GB displayed on the display device 30 into a wide band shape.

[0036] FIG. 7 is a diagram showing another example of the format of the transparency control data TD that has been created in consideration of the above points.

[0037] In the transparency control data TD shown in Figure 7, within the area where the image GB is synthesized (the area surrounded by the dotted line), the values ​​of the dot data pieces in multiple columns adjacent to each of the dot data pieces indicating "0", which represents a transmittance of 0%, are "8", which represents a transmittance of 50%, and the values ​​of the other dot data pieces are the same as the transparency control data TD shown in Figure 4.

[0038] Therefore, according to the transparency control data TD shown in FIG. 7, a strip-shaped boundary bbr having a width corresponding to the number of horizontally adjacent dot data pieces indicating "8", which represents a transmittance of 50%, is displayed on the screen of the display device 30 as the boundary between the images GA and GB, as shown in FIG. 8.

[0039] In this way, depending on the contents of the transparency control data TD, it is possible to display the boundary br between the images GA and GB as a straight line, for example, as shown in FIG. 9A, or to change the display size of the image GB to row 1 through row Y by column 1 through row X, which is narrower than the area of ​​row 1 through row Y by column 1 through row X shown in FIG. 6, as shown in FIG. 9B.

[0040] That is, in the initial state after shipment from the factory, the images GA and GB are displayed on the screen of the display device 30 in a form as shown in Fig. 6 based on the transparency control data TD shown in Fig. 4, for example. Thereafter, by a user changing the transparency control data TD using the operation device 11, the horizontal size of the image GB displayed on the screen of the display device 30 and the shape of the boundary between the images GA and GB can be changed to a form desired by the user, as shown in Fig. 8, Fig. 9A, Fig. 9B, etc. EXAMPLES

[0041] FIG. 10 is a block diagram showing the configuration of a video processing system 100A as another example of the video processing system according to the present invention.

[0042] The video processing system 100A includes cameras 10a, 10b, an operation device 11, and a display device 30, similar to the video processing system 100 shown in Figure 1, but adopts a video processing device 20A instead of the video processing device 20 included in the video processing system 100.

[0043] The video processing device 20A includes trimming units 21a and 21b and a data change control unit 24, similar to the video processing device 20 shown in FIG. 1, but employs a memory 22A and a synthesis processing unit 23A instead of the memory 22 and the synthesis processing unit 23.

[0044] The memory 22A is a non-volatile semiconductor memory such as a flash memory, and stores therein transparency control data used when the video signal VTa and the video signal VTb are transparently synthesized.

[0045] The transparency control data OSD is video data that represents each dot data piece belonging to an area on the screen of the display device 30 where the image GA based on the video signal VTa is displayed, and represents each dot data piece belonging to an area where the image GB based on the video signal VTb is displayed, in a color other than the above-mentioned designated color.

[0046] FIG. 11A is a diagram showing an example of a format of the transparency control data OSD.

[0047] In the example shown in Fig. 11A, each dot data piece is represented by 8 bits (HEX representation). That is, the transparency control data OSD shown in Fig. 11A represents each dot data piece belonging to the area in which the image GA is displayed on the screen (1st row to Yth row x 1st column to Wth column) of the display device 30 as "00h" representing black, and each dot data piece belonging to the area in which the image GB is displayed (designated area) as "FFh" representing white.

[0048] The memory 22A reads out the transparency control data in response to power-on, and supplies this to the synthesis processing unit 23A as transparency control data OSD.

[0049] The synthesis processing unit 23 A includes a transparent area adding unit 231 , a selector 232 , and a designated color transparency control unit 233 .

[0050] The transparent area adding unit 231 receives the video signal VTb supplied from the trimming unit 21b together with the above-mentioned transparency control data OSD. The transparent area adding unit 231 replaces each dot data piece included in the "FFh" area representing white in the transparency control data OSD with the video signal VTb representing the video GB, thereby generating a video signal VTd in which the "00h" area representing black is added as a transparent area to the video signal VTb representing the video GB, as shown in FIG. 11B. The transparent area adding unit 231 then supplies the generated video signal VTd to the selector 232 and the designated color transparency control unit 233.

[0051] The designated color transmission control unit 233 sequentially receives the series of each dot data piece in the video signal VTd. Then, the designated color transmission control unit 233 generates a selection signal SC that selects the video signal VTa when the dot data piece corresponds to "00h" representing the designated color (black) as shown in Fig. 11B, and selects the video signal VTd when the dot data piece corresponds to "FFh" representing white, and supplies this to the selector 232. That is, the designated color transmission control unit 233 receives the video signal VTd to which a transparent region has been added, and selects the video signal VTa in the section representing the designated color in this video signal VTd. On the other hand, in the section representing a color other than the designated color (white) in the video signal VTd, the designated color transmission control unit 233 generates a selection signal SC that selects the video signal VTd.

[0052] The selector 232 selects the video signal VTd representing the video GB when each dot data piece in the video signal VTd does not represent black in response to the selection signal SC, and selects the video signal VTa representing the video GA when each dot data piece represents black.The selector 232 then supplies the selected one of the video signals VTa and VTd to the display device 30 as a composite video signal VMX.

[0053] That is, through this selection operation, the selector 232 performs synthesis by connecting the video GB represented by the video signal VTd and the video GA represented by the video signal VTa as shown in FIG. 11C.

[0054] In this case, in the same way as in the image processing system 100, in the image processing system 100A, the size of the image GB to be displayed in a specified area on the screen of the display device 30 and the shape of the boundary between the images GA and GB can be changed to the form desired by the user by changing the transparency control data TD using the operation device 11, as shown in Figures 8, 9A and 9B, etc. EXAMPLES

[0055] FIG. 12 is a diagram showing an example of the configuration of a board module that realizes the video processing device 20 (20A).

[0056] As shown in FIG. 12, the video processing device 20 (20A) is composed of a board module in which an MCU (Micro Controller Unit) 201, a flash memory 202 as a memory 22 (22A), and a synthesis processing IC chip 203 as a synthesis processing unit 23 (23A) are mounted on a board 200.

[0057] The MCU 201 has a built-in non-volatile memory in which programs for implementing write and read control for the flash memory 202, and the operations of the trimming units 21a and 21b and the data change control unit 24 described above are stored.

[0058] By executing this program, the MCU 201 performs cropping processing as shown in Figures 3B and 3C on the captured video signals Va and Vb supplied from the cameras 10a and 10b, respectively, and supplies the resulting video signals VTa and VTb to the synthesis processing IC chip 203. Furthermore, the MCU 201 performs read access to the flash memory 202 to read out the transparency control data (TD, OSD) stored in the flash memory 202. Note that at the time of shipment from the factory, the flash memory 202 stores transparency control data, for example, as shown in Figure 4.

[0059] However, when the MCU 201 subsequently receives transparent control data for rewriting and a data change command wirelessly transmitted from the operating device 11, the MCU 201 updates the transparent control data by performing write access to the flash memory 202 to overwrite the contents of the transparent control data stored in the flash memory 202 with the received transparent control data for rewriting.

[0060] In response to a read access from the MCU 201, the flash memory 202 reads out the transparency control data stored therein, and supplies this to the combining processing IC chip 203 as transparency control data TD (OSD).

[0061] The synthesis processing IC chip 203 is formed with a circuit that performs the operation of the synthesis processing unit 23 (23A) described above, and supplies a synthetic video signal VMX obtained by synthesizing the video signals VTa and VTb based on the transparency control data TD (OSD) to the display device 30.

[0062] FIG. 13 is a diagram showing another example of the configuration of a board module that realizes the video processing device 20 (20A).

[0063] In the board module shown in FIG. 13, like the board module shown in FIG. 12, an MCU 201 and a synthesis processing IC chip 203 are mounted on a board 200, but a flash memory 202 is not mounted. Instead, a connector 204 for removably connecting the flash memory is mounted.

[0064] 13, a flash memory 202A in which the above-mentioned transparency control data (TD, OSD) is stored is prepared as an external memory and connected to the connector 204. When the flash memory 202A receives a read access from the MCU 201 via the connector 204, it reads out the transparency control data stored therein and supplies it to the composition processing IC chip 203 via the connector 204 as the transparency control data TD (OSD).

[0065] In addition, in the board module shown in FIG. 12, similarly to the board module shown in FIG. 12, when the MCU 201 receives rewrite transparent control data and a data change command wirelessly transmitted from the operation device 11, the MCU 201 overwrites the contents of the transparent control data stored in the flash memory 202A with this rewrite transparent control data.

[0066] FIG. 14 is a diagram showing a modification of the substrate module shown in FIG.

[0067] The board module shown in Fig. 14 implements a connector 204 for detachably connecting a flash memory 202A as an external memory, similar to the board module shown in Fig. 13. However, in the board module shown in Fig. 14, when the flash memory 202A is connected to the connector 204, the transparency control data stored in the flash memory 202A is written and stored in a non-volatile memory built in the MCU 201. At this time, the MCU 201 supplies the transparency control data stored in the non-volatile memory built in itself to the composition processing IC chip 203 as transparency control data TD (OSD) together with the video signals VTa and VTb cut out from the captured video signals Va and Vb as described above.

[0068] In the configurations shown in Figures 1, 10, and 12 to 14, two video signals captured by two cameras (10a, 10b) are synthesized and displayed, but the video signals to be synthesized do not have to be captured by a camera.

[0069] In short, the video processing device according to the present invention may include at least the following synthesis processing unit and memory.

[0070] That is, the synthesis processing unit (23, 23A) generates a synthesis video signal (VMX) by synthesizing the first video and the second video by making the first video included in a designated area in the screen transparent so as to arrange the first video (GA) based on the first video signal (Va, VTa) in the screen and arrange the second video (GB) based on the second video signal (Vb, VTb) different from the first video signal in the screen. The memory (22, 22A, 202, 202A) stores transmission control data (TD, OSD) that specifies the above-mentioned designated area and indicates the transmission mode (transmittance) of the first video in the designated area.

[0071] According to this configuration, by changing the contents of the transparency control data stored in the memory, it is possible to change the size of the second image (GB) to be displayed in a specified area on the screen on which the first image (GA) is displayed, and the shape of the boundary between the first and second images, to suit the user's requirements. [Explanation of symbols]

[0072] 10a, 10b Camera 20, 20A Image processing device 22, 22A Memory 23, 23A Synthesis processing section 24 Data change control section 30 Display device

Claims

1. a synthesis processing unit that generates a synthesized video signal by synthesizing the first video and the second video by making the first video included in a designated area of ​​the screen transparent so that a first video based on a first video signal is arranged within the screen and a second video based on a second video signal different from the first video signal is arranged within the screen; a memory that stores transparency control data that identifies the specified area and indicates a transparency mode of the first image in the specified area.

2. The image processing device according to claim 1, characterized in that the synthesis processing unit arranges the second image so as to be superimposed on at least a portion of the first image, and the designated area within the screen is in an area where the first image and the second image are superimposed.

3. 3. The video processing device according to claim 2, further comprising a data change control unit that, when receiving rewrite transparent control data and a data change command, overwrites the transparent control data stored in the memory with the rewrite transparent control data.

4. the transparency control data is made up of a plurality of dot data pieces corresponding to each dot on the screen, An image processing device as described in any one of claims 1 to 3, characterized in that each of the dot data pieces corresponding to each dot belonging to the specified area exhibits a transmittance of 100%, and each of the dot data pieces corresponding to each dot belonging to areas other than the specified area exhibits a transmittance of 0%.

5. the transparency control data is made up of a plurality of dot data pieces corresponding to each dot on the screen, An image processing device as described in any one of claims 1 to 3, characterized in that each of the dot data pieces corresponding to each dot belonging to the boundary between the specified area and an area other than the specified area on the screen exhibits a transmittance of 50%, each of the dot data pieces corresponding to each dot belonging to the specified area excluding each dot belonging to the boundary exhibits a transmittance of 100%, and each of the dot data pieces corresponding to each dot belonging to an area other than the specified area exhibits a transmittance of 0%.

6. the transparency control data is made up of a plurality of dot data pieces corresponding to each dot on the screen, each of the dot data pieces corresponding to each dot belonging to the designated area is video data representing a predetermined designated color, and each of the dot data pieces corresponding to each dot belonging to an area other than the designated area is video data representing a color other than the designated color, The synthesis processing unit includes: a transparent area adding unit that replaces the dot data pieces that belong to an area that represents the specified color in the transparency control data with the second video signal, thereby generating a transparent area added video signal in which an area that represents a color other than the specified color is added as a transparent area to the second video signal; a designated color transmission control unit that receives the transparent area added video signal, and generates a selection signal that selects the first video signal in a section that represents the designated color in the transparent area added video signal, and selects the transparent area added video signal in a section that represents a color other than the designated color in the transparent area added video signal; A selector that selects one of the first video signal and the transparent area added video signal in accordance with the selection signal and outputs the selected one as the composite video signal.

7. 4. The image processing device according to claim 1, wherein the memory is a non-volatile memory in which the transparency control data is rewritable.

8. 8. The image processing device according to claim 7, further comprising a board on which a connector for detachably connecting the synthesis processing unit and the memory is provided.

9. a first camera that outputs a first video signal representing a captured image; a second camera that outputs a second video signal representing the captured image; A display device having a single screen; a synthesis processing unit that generates a synthesized video signal by synthesizing the first video and the second video by making the first video included in a designated area of ​​the screen transparent so that a first video based on the first video signal is arranged within the screen and a second video based on a second video signal different from the first video signal is arranged within the screen; a memory that stores transparency control data that identifies the designated area and indicates a transparency state of the first image in the designated area; A video processing system comprising: a data change control unit that, when receiving rewrite transparent control data and a data change command, overwrites the transparent control data stored in the memory with the rewrite transparent control data.

Images