WO2023204265A1

WO2023204265A1 - Signal processing system and signal processing method

Info

Publication number: WO2023204265A1
Application number: PCT/JP2023/015725
Authority: WO
Inventors: 宣彰倉林
Original assignee: 京セラ株式会社
Priority date: 2022-04-20
Filing date: 2023-04-20
Publication date: 2023-10-26

Abstract

The present invention easily and accurately acquires information. This signal processing system comprises a distributor for distributing a video signal which is to be displayed by a display device, a capture unit for generating an analyzable captured image from the distributed video signal, and an output unit for outputting a captured image to an analysis device that analyzes the captured image.

Description

Signal processing system and signal processing method

The present disclosure relates to a signal processing system and the like that generate captured images to be analyzed.

Technology for reading information from captured images and converting them into data is known. Patent Document 1 discloses a technique for performing OCR processing on an image taken with a camera and converting it into character data.

Japanese Patent Application Publication No. 2014-153734

A signal processing system according to an aspect of the present disclosure includes: a distributor that distributes a video signal to be displayed on a display device; a capture unit that generates a capture image that can be analyzed from the distributed video signal; and an output unit that outputs the captured image to an analysis device that analyzes the captured image.

A signal processing method according to an aspect of the present disclosure is a signal processing method for generating an image to be analyzed, and includes a distributor that distributes a video signal to be displayed on a display device, and the distributor The method includes a distribution step of distributing a signal, a capture step of generating an analyzable captured image from the distributed video signal, and an output step of outputting the captured image to an analysis device that analyzes the captured image.

1 is a schematic diagram showing an overall outline of a signal processing system according to an embodiment of the present disclosure. FIG. 2 is a functional block diagram showing the configuration of main parts of the analysis device. FIG. 7 is a diagram illustrating an example of analyzing only a part of a captured image. FIG. 6 is a diagram illustrating an example of determining whether or not to analyze a captured image. FIG. 6 is a diagram illustrating an example of determining whether or not to analyze a captured image. FIG. 6 is a diagram illustrating an example of presentation of analysis results of an analysis unit. FIG. 2 is a functional block diagram showing the configuration of main parts of the analysis device. FIG. 6 is a diagram illustrating an example of modifying analysis results. FIG. 2 is a schematic diagram showing an overall outline of another signal processing system. FIG. 3 is a schematic diagram showing an overall outline of yet another signal processing system. FIG. 3 is a schematic diagram showing an overall outline of a modification of the signal processing system.

In the case of a configuration in which photography is performed using a camera, such as that described in Patent Document 1, there is a need for a place to install the camera, and it is necessary to deal with poor photography due to lens dirt, etc., which causes trouble. In addition, if the reading accuracy is poor, the accuracy of OCR processing will be lowered, so it will be necessary to accurately focus the camera, which will make the processing complicated. Furthermore, in order to improve reading accuracy, it is desirable to obtain high-definition images, which requires highly functional photographic equipment.

Therefore, there is room for improvement in the technology described in Patent Document 1 in terms of easily and accurately acquiring information.

The signal processing system and signal processing method according to one aspect of the present disclosure distributes a video signal and performs analysis on a captured image obtained by capturing the distributed video signal. do not have. Further, the signal processing system and signal processing method according to one aspect of the present disclosure analyze a captured image obtained by capturing a video signal as it is, so that information included in the image can be accurately acquired. Therefore, the signal processing system and signal processing method according to one aspect of the present disclosure can easily and accurately perform analysis and obtain accurate information, compared to the case of analyzing captured images captured with a camera. This effect is achieved.

First, with reference to FIG. 1, a signal processing system 1 according to the present embodiment will be described. FIG. 1 is a schematic diagram for explaining a signal processing system 1. As shown in FIG. As shown in FIG. 1, the signal processing system 1 includes a distributor 11, a capture section 12, and an output section 13. Although a system including the distributor 11, the capture unit 12, and the output unit 13 will be described below as the signal processing system 1, the signal processing system 1 may include the analysis device 30.

The distributor 11 distributes the video signal transmitted from the device control device 10 to the display device 20 (distribution step). The distributed video signal is transmitted to the display device 20 and the capture unit 12.

Here, the equipment control device 10 is, for example, a control device that controls production equipment. The device control device 10 , for example, generates a screen that presents acquired data acquired from a controlled object to a user, and transmits a video signal to the display device 20 for displaying the screen on the display device 20 . Thereby, the screen is displayed on the display device 20.

The display device 20 is a so-called display, and is capable of displaying various information. The display device 20 may be attached integrally with the device control device 10, or may be connected to the device control device 10 by wire.

The capture unit 12 generates a captured image from the video signal distributed by the distributor 11 (capture step). The generated captured image is sent to the output unit 13. The capture unit 12 captures the input video signal at a predetermined frequency and generates a captured image. The predetermined frequency may be lower than the refresh rate of display device 20. In other words, the number of captures per minute by the capture unit 12 may be smaller than the refresh rate of the display device 20. This is because in the display device 20, there is no possibility that images will be changed more frequently than the refresh rate, and there is no point in capturing images more frequently than the refresh rate. In other words, waste can be eliminated by making the predetermined frequency smaller than the refresh rate of the display device 20. The predetermined frequency may be a predetermined frequency.

Furthermore, the interval at which the capture unit 12 performs capture may be adjustable. By adjusting the capture interval, the capture unit 12 can generate an appropriate amount of captured images and send them to the output unit 13. Thereby, in the signal processing system 1, the possibility that the capture unit 12 and the analysis device 30 will be in an overload state can be reduced.

Furthermore, the captured image generated by the capture unit 12 may be recorded in a predetermined storage unit (not shown).

The output unit 13 outputs the captured image generated by the capture unit 12 to the analysis device 30 (output step).

The analysis device 30 analyzes the captured image generated by the capture unit 12. Details of the analysis device 30 will be described with reference to FIG. 2. FIG. 2 is a functional block diagram showing the main part configuration of the analysis device 30.

As shown in FIG. 2, the analysis device 30 includes an acquisition section 31, an analysis section 32, and a presentation section 34. Furthermore, the analysis section 32 may include an image determination section 33.

The acquisition unit 31 acquires the captured image from the output unit 13 and transmits it to the analysis unit 32.

The analysis unit 32 analyzes the captured image acquired via the acquisition unit 31. An example of the analysis performed by the analysis unit 32 is, for example, OCR (Optical Character Recognition/Reader) processing. OCR processing makes it possible to obtain character data indicating characters included in the captured image from the captured image. The analysis performed by the analysis unit 32 is not limited to OCR, and may be an analysis for acquiring a pattern included in a captured image as data.

As an example, the analysis unit 32 may perform analysis using a pattern such as an icon included in the captured image. Specifically, if the captured image includes a pattern such as an icon indicating the status of the equipment to be monitored (equipment control device 10), the analysis unit 32 may acquire the pattern as data to be analyzed. good. In this case, the analysis unit 32 may convert the state of the equipment to be monitored into data by performing pattern matching using the acquired pattern data as an analysis method.

Further, the analysis unit 32 may be capable of performing multiple analyzes using different processing methods in parallel, or may be capable of performing multiple analyzes using different processing algorithms in parallel even if the processing method is the same. It may be possible to do so. Examples of analyzes using different processing algorithms include analyzes using different parameter values.

Furthermore, the analysis unit 32 may analyze only a part of the captured image. An example in which only a part of one captured image is analyzed will be described with reference to FIG. 3. 301 in FIG. 3 indicates a captured image. When analyzing only part of the captured image, the analysis unit 32 analyzes only the region 311 of the captured image 301, that is, only data A and data B, for example. The area to be analyzed may be determined in advance. By analyzing only a portion of the captured image, the load on the analysis can be reduced compared to the case where the entire captured image is analyzed.

The image determination unit 33 determines whether the captured image acquired via the acquisition unit 31 is a captured image to be analyzed. When the image determination unit 33 is provided, the analysis unit 32 may analyze only the captured image that the image determination unit 33 determines to be an analysis target.

The image determination unit 33 may determine captured images that meet predetermined conditions to be analyzed. By only analyzing captured images that meet predetermined conditions, it is possible to reduce the load on analysis and reduce the reading of erroneous data from unintended screens compared to the case where all captured images are analyzed. Here, the predetermined condition may be, for example, that there is a predetermined mark at a predetermined position, or that the overall configuration of the captured image matches the predetermined configuration. Alternatively, it may be a captured image generated at a predetermined time.

Furthermore, the image determination unit 33 may determine, among captured images generated at a predetermined frequency, a captured image that is different from the previous captured image to be an analysis target. For example, assume that there is a captured image 401 as shown in FIG. 4 and a captured image 402 generated at the next generation timing. Since the captured image 401 and the captured image 402 have the same display content except for the time, the image determination unit 33 determines that the captured image 402 is not an analysis target.

On the other hand, assume that there is a captured image 501 as shown in FIG. 5 and a captured image 502 generated at the next generation timing. Captured image 501 and captured image 502 cannot be said to be the same image. Specifically, the captured image 501 and the captured image 502 differ in image shape, aspect ratio, position of the area showing characters, and the like. Therefore, the image determination unit 33 determines that the captured image 502 is an analysis target. This reduces the time required for the analysis unit 32 to register and analyze captured images that do not need to be converted into data as analysis targets. Furthermore, the possibility that erroneously read data will occur due to analysis of unnecessary captured images is reduced. The conditions for determining that the captured image 501 and the captured image 502 cannot be said to be the same image may be conditions other than those described above. For example, when two captured images are superimposed, if there is a difference in at least part of the area other than the area indicating the time, it is determined that these captured images cannot be said to be the same image. It's fine.

The presentation unit 34 presents the analysis results in the analysis unit 32. FIG. 6 shows an example of the analysis results of the analysis unit 32 presented by the presentation unit 34. In the example shown in FIG. 6, the result of the analysis of the captured image is presented as a monitoring screen 601, and the time 611 is presented in the upper right corner, and data A to data The alphanumeric character E is presented.

[Another form of analysis device 30]
FIG. 7 shows an analysis device 30' which is another form of the analysis device 30. In an analysis device 30' shown in FIG. 7, a comparison section 35 and a correction section 36 are added to the analysis device 30 shown in FIG.

The comparison unit 35 compares the results of multiple analyzes when the analysis unit 32 can execute multiple analyzes using different processing methods in parallel. The comparison results are then presented by the presentation unit 34. The user can verify the accuracy of the analysis by checking the comparison results. Furthermore, the analysis unit 32 may be able to execute multiple analyzes using the same processing method in parallel. As an example, the analysis unit 32 may perform analysis using a plurality of different software that employs OCR processing as a processing method. In this case, the comparing unit 35 may compare the results of multiple analyzes performed by the analyzing unit 32 using multiple different software.

Since OCR processing generates character data by inferring characters from their shapes, if the display is unclear, characters with similar shapes may be mistakenly determined. For example, the number "8" and the alphabet "S" may be mistakenly determined. Therefore, when the captured image displays data of multiple items, the correction unit 36 adjusts the order of the types of character data obtained as a result of OCR processing to the order of the types of character data obtained as a result of other OCR processing for the same item. When the order of types is different, the character data that is the result of OCR processing is corrected. Here, the type of character data refers to numbers, alphabetic characters, etc. In other words, the order of the types of character data is different between data in which character data is arranged in the order of numbers, numbers, and alphabets, and data in which the characters are arranged in the order of numbers, alphabets, and numbers. For example, when the character data that is the result of OCR processing is composed of alphabets and numbers, the character data of the same item are often arranged in the same type. Therefore, if the order of the types of character data is different from other OCR results, there is a high possibility that the OCR processing is incorrect. Therefore, the modification unit 36 modifies the character data when there is a high possibility that such OCR processing is erroneous.

An example of modification is shown in Figure 8. For example, the result of analysis by the analysis unit 32 at a certain timing of data C is “98ST7” as shown in 801, and the result of analysis by the analysis unit 32 at the next timing is “77ST5” as shown in 802. Assume that the result of analysis by the analysis unit 32 at the next timing is "668T5" as shown in 803. As shown in 801 and 802, the data C is thought to be represented by "numbers, numbers, alphabets, alphabets, numbers", but in 803 it is represented by "numbers, numbers, numbers, alphabets, numbers". In this case, the correction unit 36 determines that the third number of 803 is likely to be an incorrect alphabetic character, and based on the results of 801 and 802, corrects the third number to the alphabetic character "S". do. When modifying character data, the modifying unit 36 associates the modified character data with the modified character data and stores it in a storage unit (not shown) as a log of the modified parts. Good too. The log may include information such as a captured image corresponding to the modified character data and the date and time when the modification was performed. By checking the log, the user can recognize the character identification rate by OCR processing.

As described above, the signal processing system 1 according to the present embodiment includes the distributor 11 that distributes a video signal to be displayed on the display device 20, and the capture unit 12 that generates an analyzable capture image from the distributed video signal. , and an output unit 13 that outputs the captured image to an analysis device 30 that analyzes the captured image.

As a result, the video signal is distributed and a captured image is generated from the distributed video signal and output, so an image more suitable for analysis than an image taken with a camera can be output to the analysis device 30. Since the analysis device 30 can analyze the captured image generated from the video signal, it is possible to accurately acquire the information included in the image. Therefore, information can be easily and accurately acquired.

[Modification 1]
With reference to FIG. 9, a signal processing system 1A that is a modification of the signal processing system 1 will be described. FIG. 9 is a schematic diagram showing an overall outline of the signal processing system 1A.

As shown in FIG. 9, in the signal processing system 1A, a video signal (first video signal) output from the device control device 10 and displayed on the display device 20 is distributed and captured by a distributor 11 (first distributor). A video signal (second video signal) that is input to the unit 12, output from the equipment control device 10A different from the equipment control device 10, and displayed on the display device 20A is distributed by the distributor 11A (second distributor). and is input to the capture unit 12. That is, two video signals, the first video signal output from the device control device 10 and the second video signal output from the device control device 10A, are input to the capture unit 12. In other words, the signal processing system 1A includes two distributors 11 (first distributor, second distributor), and the capture unit 12 receives video signals (first distributor) from two device control devices 10 (10A). video signal, second video signal) is input. The video signal from the device control device 10 and the video signal from the device control device 10A may be switched and input to the capture unit 12 one by one. The capture unit 12 may generate capture images from both the first video signal distributed by the distributor 11 (first distributor) and the video signal distributed by the distributor 11A (second distributor). good.

As a result, even if there are multiple device control devices 10 (10A) and video signals are sent from each to the display device 20 (20A), the video signals are distributed and analyzed by one signal processing system 1A. can be done.

Additionally, the capture unit 12 may compare the input first video signal and second video signal. As an example, the capture unit 12 generates two captured images using a first video signal and a second video signal, and displays a common part between these two captured images, for example, a common part between the two captured images. You may also compare the icons etc. By comparing the two captured images, the capture unit 12 determines whether one of the captured images is degraded, that is, whether one of the acquired first video signal and second video signal is degraded. It is possible to verify whether If either the first video signal or the second video signal is degraded, the capture unit 12 may re-acquire the degraded video signal. By the capture unit 12 performing the above-described processing, the signal processing system 1A can reduce the possibility that degraded video signals will be used, and can further improve the accuracy of reading captured images.

The number of video signals input to the capture unit 12 is not limited to two, and may be three or more.

Furthermore, even if the format of the video signal transmitted from the device control device 10 and the format of the video signal transmitted from the device control device 10A are different formats, the capture unit 12 generates a captured image using the same method ( (created). If the captured images generated by the capture unit 12 are generated using the same method, the analysis device 30 that analyzes the captured images only needs to analyze the captured images generated using the same method, so that processing can be facilitated. .

[Modification 2]
With reference to FIG. 10, a signal processing system 1B, which is a further modification of the signal processing system 1, will be described. FIG. 10 is a schematic diagram showing an overall outline of the signal processing system 1B.

As shown in FIG. 10, in the signal processing system 1B, the video signal output from the device control device 10 and displayed on the display device 20 is distributed by the distributor 11 and input to the capture unit 12. The captured image generated by the capture unit 12 is output to the analysis device 30 via the output unit 13 and analyzed by the analysis device 30.

Furthermore, a video signal output from the device control device 10B and displayed on the display device 20B is distributed by the distributor 11B and input to the capture unit 12B. The captured image generated by the capture unit 12B is output to the analysis device 30 via the output unit 13B and analyzed by the analysis device 30.

In this way, the signal processing system 1B includes a distributor 11 (11B), a capture unit 12 (12B), and an output unit 13 (13B) for each device control device 10 (10B).

As a result, even if there are a plurality of device control devices 10 (10B) and a video signal is transmitted from each to the display device 20 (20B), one analysis device 30 can analyze the video signal.

[Modification 3]
A further modification of the signal processing system 1 will be described with reference to FIG. 11. FIG. 11 is a schematic diagram showing an overall outline of a further modified example of the signal processing system 1.

As shown in FIG. 11, in this modification, the captured image output from the signal processing system 1 is transmitted as a video signal to the display device 20C via the analysis device 30, and displayed on the display device 20C. The display device 20C has a larger screen size than the display device 20.

The image displayed on this display device 20C is captured by an imaging device 40A and an imaging device 40B, and the image data of the image captured by the imaging device 40A is sent to the analysis device 30A, and the image data of the image captured by the imaging device 40B is It is transmitted to the analysis device 30B. The analysis device 30A and the analysis device 30B each perform image analysis (eg, OCR).

Since the display device 20C has a larger screen size than the display device 20, the images captured by the imaging device 40A and the imaging device 40B can be captured with higher definition than the captured image of the display screen of the display device 20. Therefore, the result of analyzing the captured images captured by the imaging device 40A and the imaging device 40B is likely to be more accurate than analyzing the image captured by the display device 20 as it is.

As described above, in this modification, analysis can be made more accurate by displaying the captured image generated by the capture unit 12 on the imaging device 40A and the imaging device 40B, which have larger screen sizes than the display device 20. Further, although the display device 20 needs to be installed close to the device control device 10, the display device 20C, unlike the display device 20, can be installed at a position away from the device control device 10. Therefore, the display device 20C can be installed without any locational restrictions.

Furthermore, the analysis device 30A or the analysis device 30B in this modification may include a comparison unit 35. The comparison unit 35 may compare the image captured by the imaging device 40A or the imaging device 40B with the captured image generated by the capture unit 12. For example, the comparing unit 35 may compare the entire image captured by the

imaging device

40A or 40B with the captured image generated by the capturing unit 12, or may compare only the portion with poor reading accuracy. good. When the comparison unit 35 performs the comparison, the analysis unit 32 can perform analysis using an image that is easy to read, and thus can improve the accuracy of image reading.

The present disclosure is not limited to the embodiments described above, and various changes can be made within the scope of the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. are also included within the technical scope of the present disclosure. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment.

For example, in the above example, an example was explained in which the data analyzed by the analysis unit 32 is presented to the presentation unit 34, but the analysis device 30 further includes a confirmation unit that confirms the data analyzed by the analysis unit 32. Good too. Then, the analysis result may be presented to the presentation unit 34 after being confirmed by the confirmation unit.

The verification unit can, for example, verify the analysis results. Further, the confirmation unit can, for example, verify the analysis results. When data A to data E are numerical data, the verification unit may perform calculations on data A to data E. Specifically, when monitoring the production status of a given product, data A is the number of non-defective items, data B is the number of defective items with defective item 1, data C is the number of defective items with defective item 2, and data D is the number of defective items with defective item 3. When the number and data E indicate the total number of tests, the numerical value indicated by data E should be the same value as the sum of the numerical values indicated by data A to data D. Therefore, by comparing the sum of the numerical values of the analysis results of data A to data D with the numerical value of the analysis result of data E, it is possible to confirm whether or not the analysis results are correct.

Furthermore, in the above example, the verification unit performs verification using the analysis results within the captured image. In other words, although we have described an example in which the analysis results are verified by comparing the data within one analysis result, the verification section also verifies the analysis results by comparing the analysis results of multiple captured images. It's okay. Further, the confirmation unit may perform the verification by comparing the analysis results with past test results. Specifically, when the total number of tests is output as an analysis result as in the example above, the analysis result can be compared with the past analysis results and confirmed that the value is larger than the past analysis results. It may also be determined whether or not it is correct. Note that the past analysis results to be compared may be verified data. Furthermore, if the past analysis results to be compared have not been verified, the correctness may be determined based on whether or not a value larger than the past analysis results has been continuously output.

Furthermore, when the analysis result is determined to be incorrect by the verification performed by the confirmation unit, the analysis device 30 may store the analysis result in the storage unit. As a result, it becomes possible to verify the malfunction of the analysis unit thereafter.

〔summary〕

Signal processing systems

1, 1A, and 1B according to aspect 1 of the present disclosure include

distributors

11, 11A, and 11B that distribute video signals to be displayed on

display devices

20, 20A, 20B, and 20C, and It includes a

capture unit

12, 12A, 12B that generates an analyzable captured image, and an

output unit

13, 13B that outputs the captured image to an analysis device 30, 30', 30A, 30B that analyzes the captured image. .

A

signal processing system

1, 1A, 1B according to an aspect 2 of the present disclosure is provided with the analysis device 30, 30', 30A, 30B in the aspect 1, and a plurality of the analysis devices 30, 30', 30A, 30B are provided. It is also possible to include a comparison unit 35 that is capable of performing the above analyzes and compares the results of the plurality of analyses.

In the

signal processing systems

1, 1A, and 1B according to aspect 3 of the present disclosure, in the aspect 2, the analysis devices 30, 30', 30A, and 30B may be capable of performing a plurality of analyzes using different processing methods. .

In a

signal processing system

1, 1A, 1B according to an aspect 4 of the present disclosure, in any one of the aspects 1 to 3, the

capture unit

12, 12A, 12B captures the video signal at a predetermined frequency. , the predetermined frequency may be lower than the refresh rate of the

display device

20, 20A, 20B, 20C.

In the

signal processing system

1, 1A, 1B according to an aspect 5 of the present disclosure, in the aspect 4, the analysis device 30, 30', 30A, 30B selects a capture image that satisfies a predetermined condition from among the generated capture images. Only images may be analyzed.

In the

signal processing system

1, 1A, 1B according to aspect 6 of the present disclosure, in the aspect 5, the analysis device 30, 30', 30A, 30B is configured to perform the analysis of the previous captured image among the generated captured images. It is also possible to analyze only the captured images that are different from the above.

In a

signal processing system

1, 1A, 1B according to an aspect 7 of the present disclosure, in any one of the aspects 1 to 6, the analysis device 30, 30', 30A, 30B analyzes only a predetermined region of the captured image. You may.

In a

signal processing system

1, 1A, 1B according to an aspect 8 of the present disclosure, in any one of the aspects 1 to 7, the analysis device 30, 30', 30A, 30B performs OCR (Optical Character Recognition/Reader) processing. , character data may be generated from the captured image.

In the

signal processing system

1, 1A, 1B according to aspect 9 of the present disclosure, in the aspect 8, when the captured image displays data of a plurality of items, the analysis device 30, 30', 30A, 30B may include a modification unit 36 that modifies the character data when the arrangement of the types of character data obtained as a result of OCR processing is different from the arrangement obtained as a result of other OCR processing for the same item.

A

signal processing system

1, 1A, 1B according to an aspect 10 of the present disclosure includes a first distributor (distributor 11) that distributes a first video signal, and a first distributor (distributor 11) that distributes a first video signal, in any one of the aforementioned aspects 1 to 9. and a second distributor (distributor 11A) for distributing the video signal distributed by the first distributor and the video signal distributed by the second distributor. The captured image may be generated from both.

In a

signal processing system

1, 1A, 1B according to an eleventh aspect of the present disclosure, in any one of the aspects 1 to 10, the

capture unit

12, 12A, 12B is configured to control the

capture unit

12, 12A, 12B regardless of the format of the plurality of video signals. Images may be created in the same manner.

A signal processing method according to aspect 12 of the present disclosure is a signal processing method for generating an image to be analyzed, and includes a distributor 11 that distributes a video signal to be displayed on

display devices

20, 20A, 20B, and 20C; 11A, 11B, a distribution step of distributing the video signal by the

distributors

11, 11A, 11B, a capture step of generating an analyzable capture image from the distributed video signal, and a capture step of generating an analyzable capture image from the distributed video signal. and an output step of outputting the captured image to an analysis device that analyzes the captured image.

1, 1A, 1B Signal processing system 10

Equipment control device

11, 11A,

11B Distributor

20, 20A, 20B,

20C Display device

12, 12A,

12B Capture section

13, 13B Output section 30, 30', 30A, 30B Analysis device 31 Acquisition unit 32 Analysis unit 33 Image determination unit 34 Presentation unit 35 Comparison unit 36

Correction unit

40, 40A, 40B Imaging device

Claims

a distributor that distributes a video signal to be displayed on a display device;
a capture unit that generates an analyzable capture image from the distributed video signal;
A signal processing system comprising: an output unit that outputs the captured image to an analysis device that analyzes the captured image.
comprising the analysis device,
The signal processing system according to claim 1, wherein the analysis device is capable of performing a plurality of analyzes and includes a comparison unit that compares results of the plurality of analyses.
The signal processing system according to claim 2, wherein the analysis device is capable of executing a plurality of analyzes using different processing methods.
The capture unit captures the video signal at a predetermined frequency,
The signal processing system according to claim 1, wherein the predetermined frequency is smaller than a refresh rate of the display device.
The signal processing system according to claim 4, wherein the analysis device analyzes only captured images that satisfy a predetermined condition among the generated captured images.
The signal processing system according to claim 5, wherein the analysis device analyzes only a captured image that is different from a previous captured image among the generated captured images.
The signal processing system according to claim 1, wherein the analysis device analyzes only a predetermined region of the captured image.
The signal processing system according to any one of claims 1 to 7, wherein the analysis device generates character data from the captured image by OCR (Optical Character Recognition/Reader) processing.
If the captured image displays data of multiple items,
The analyzing device further comprises a modification unit that modifies the character data when the arrangement of types of character data obtained as a result of OCR processing is different from the arrangement obtained as a result of other OCR processing for the same item. 8. The signal processing system according to 8.
a first distributor that distributes the first video signal;
a second distributor that distributes the second video signal;
The capture unit generates the captured image from both the video signal distributed by the first distributor and the video signal distributed by the second distributor. The signal processing system described.
The signal processing system according to any one of claims 1 to 10, wherein the capture unit creates the captured images using the same method regardless of the format of the plurality of video signals.
A signal processing method for generating an image to be analyzed, the method comprising:
Equipped with a distributor that distributes video signals to be displayed on a display device,
a distribution step of distributing the video signal with the distributor;
a capturing step of generating an analyzable captured image from the distributed video signal;
A signal processing method comprising: outputting the captured image to an analysis device that analyzes the captured image.