Signal processing system and signal processing method

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

[Technical Field]

[0001] The present disclosure relates to a signal processing system and the like that generates a captured image to be analyzed. [Background technology]

[0002] There are known techniques for reading information from captured images and converting it into data. Patent Document 1 discloses a technique for performing OCR processing on images captured by a camera to convert the information into character data. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-153734 Summary of the Invention

[0004] A signal processing system according to one 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 an analyzable capture image from the distributed video signal, and an output unit that outputs the capture image to an analysis device that analyzes the capture image.

[0005] A signal processing method according to one aspect of the present disclosure is a signal processing method for generating an image to be analyzed, which includes a distributor that distributes a video signal to be displayed on a display device, and includes a distribution step of distributing the video signal using the distributor, a capture step of generating an analyzable capture image from the distributed video signal, and an output step of outputting the capture image to an analysis device that analyzes the capture image. [Brief explanation of the drawings]

[0006] [Figure 1] 1 is a schematic diagram showing an overall overview of a signal processing system according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a functional block diagram showing the configuration of a main part of the analysis device. [Figure 3] FIG. 10 is a diagram showing an example in which only a part of a captured image is analyzed. [Figure 4] FIG. 10 is a diagram illustrating an example of determining whether or not to analyze a captured image. [Figure 5] FIG. 10 is a diagram illustrating an example of determining whether or not to analyze a captured image. [Figure 6] FIG. 10 is a diagram showing an example of presentation of analysis results by an analysis unit. [Figure 7] FIG. 2 is a functional block diagram showing the configuration of a main part of the analysis device. [Figure 8] FIG. 10 is a diagram illustrating an example of correcting an analysis result. [Figure 9] FIG. 10 is a schematic diagram showing an overall overview of another signal processing system. [Figure 10] FIG. 10 is a schematic diagram showing an overall overview of yet another signal processing system. [Figure 11] FIG. 10 is a schematic diagram showing an overall overview of a modified example of a signal processing system. DETAILED DESCRIPTION OF THE INVENTION

[0007] In the case of a configuration in which images are taken with a camera, as described in Patent Document 1, it is necessary to find a place to install the camera and to deal with poor image capture due to lens dirt, etc., which creates a lot of work. In addition, poor reading accuracy reduces the accuracy of the OCR process, so it becomes necessary to accurately focus the camera, which makes the process more complicated. Furthermore, in order to improve reading accuracy, it is desirable to obtain high-resolution images, which requires high-performance imaging equipment.

[0008] Therefore, the technology described in Patent Document 1 has room for improvement in terms of obtaining information easily and accurately.

[0009] A signal processing system and a signal processing method according to an embodiment of the present disclosure distribute a video signal and analyze a captured image obtained by capturing the distributed video signal, thereby eliminating the drawbacks associated with capturing an image with a camera. Furthermore, the signal processing system and the signal processing method according to an embodiment of the present disclosure analyze a captured image obtained by capturing the video signal as is, thereby enabling accurate acquisition of information contained in the image. Therefore, the signal processing system and the signal processing method according to an embodiment of the present disclosure achieve the effect of enabling easier and more accurate analysis and acquisition of accurate information compared to analyzing an image captured by a camera.

[0010] First, a signal processing system 1 according to this embodiment will be described with reference to Fig. 1. Fig. 1 is a schematic diagram for explaining the signal processing system 1. As shown in Fig. 1, the signal processing system 1 includes a distributor 11, a capture unit 12, and an output unit 13. In the following, a system including the distributor 11, the capture unit 12, and the output unit 13 will be described as the signal processing system 1, but the signal processing system 1 may also include an analysis device 30.

[0011] 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.

[0012] Here, the equipment control device 10 is, for example, a control device that controls a production device. The equipment control device 10 generates a screen that presents data acquired from a controlled object to a user, and transmits a video signal to the display device 20 to display the screen on the display device 20. As a result, the screen is displayed on the display device 20.

[0013] The display device 20 is a so-called display, and can display various information, etc. The display device 20 may be attached integrally to the device control device 10, or may be connected to the device control device 10 by wire.

[0014] The capture unit 12 generates a capture image from the video signal distributed by the distributor 11 (capture step). The generated capture image is sent to the output unit 13. The capture unit 12 captures the input video signal at a predetermined frequency to generate a capture image. The predetermined frequency may be smaller than the refresh rate of the 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 there is no possibility that the image will be changed more frequently than the refresh rate of the display device 20, and there is no point in capturing more frequently than the refresh rate. In other words, by setting the predetermined frequency smaller than the refresh rate of the display device 20, waste can be eliminated. The predetermined frequency may be a predetermined frequency.

[0015] The interval at which the capture unit 12 performs capture may be adjustable. By adjusting the interval at which the capture unit 12 performs capture, the capture unit 12 can generate an appropriate number of capture images and send them to the output unit 13. This reduces the possibility that the capture unit 12 and the analysis device 30 will be overloaded in the signal processing system 1.

[0016] Furthermore, the captured image generated by the capture unit 12 may be recorded in a predetermined storage unit (not shown).

[0017] The output unit 13 outputs the captured image generated by the capture unit 12 to the analysis device 30 (output step).

[0018] The analysis device 30 analyzes the captured image generated by the capture unit 12. The analysis device 30 will be described in detail with reference to Fig. 2. Fig. 2 is a functional block diagram showing the configuration of the main parts of the analysis device 30.

[0019] 2, the analysis device 30 includes an acquisition unit 31, an analysis unit 32, and a presentation unit 34. The analysis unit 32 may also include an image determination unit 33.

[0020] The acquisition unit 31 acquires the capture image from the output unit 13 and transmits it to the analysis unit 32 .

[0021] 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 OCR (Optical Character Recognition / Reader) processing. The OCR processing makes it possible to acquire 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 the captured image as data.

[0022] 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 (equipment control device 10) to be monitored, the analysis unit 32 may acquire the pattern as data to be analyzed. In this case, the analysis unit 32 may perform pattern matching using the acquired pattern data as an analysis method to digitize the status of the equipment to be monitored.

[0023] Furthermore, the analysis unit 32 may be capable of performing multiple analyses using different processing methods in parallel, or multiple analyses using the same processing method but different processing algorithms in parallel. An example of an analysis using different processing algorithms is an analysis using different parameter values.

[0024] Furthermore, the analysis unit 32 may analyze only a portion of the captured image. An example of analyzing only a portion of one captured image will be described with reference to FIG. 3. 301 in FIG. 3 indicates a captured image. When analyzing only a portion of the captured image, the analysis unit 32 analyzes, for example, only an area 311 of the captured image 301, that is, only data A and data B. 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 analyzing the entire captured image.

[0025] The image determination unit 33 determines whether or not 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 has determined to be a captured image to be analyzed.

[0026] The image determination unit 33 may determine that a captured image that satisfies a predetermined condition is to be analyzed. By determining only captured images that satisfy the predetermined condition as the analysis target, the load on the analysis can be reduced compared to analyzing all captured images, and the reading of erroneous data from unintended screens can be reduced. Here, the predetermined condition may be, for example, a predetermined mark at a predetermined position, the overall configuration of the captured image matching a predetermined configuration, or a captured image generated at a predetermined time.

[0027] Furthermore, the image determination unit 33 may determine that, among the capture images generated at a predetermined frequency, a capture image that is different from the immediately preceding capture image is to be analyzed. For example, assume that there is a capture image 401 as shown in Fig. 4 and a capture image 402 generated at the next generation timing. Since the display content of the capture image 401 and the capture image 402 is the same except for the time, the image determination unit 33 determines that the capture image 402 is not to be analyzed.

[0028] On the other hand, suppose there is a capture image 501 as shown in FIG. 5 and a capture image 502 generated at the next generation timing. The capture images 501 and 502 cannot be considered the same image. Specifically, the capture images 501 and 502 differ in image shape, aspect ratio, and position of the text area. Therefore, the image determination unit 33 determines that the capture image 502 is the image to be analyzed. This reduces the time required for the analysis unit 32 to register and analyze a capture image that does not need to be converted into data. It also reduces the possibility of erroneous reading data occurring due to the analysis of an unnecessary capture image. The conditions for determining that the capture images 501 and 502 are not the same image may be conditions other than those described above. For example, when two capture images are superimposed, if there is a difference between the two images in at least a portion of the area other than the area indicating the time, the captured images may be considered not to be the same image.

[0029] The presentation unit 34 presents the analysis results of 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 analysis results of the captured image are presented as a monitoring screen 601, with the time 611 presented in the upper right corner and alphanumeric characters of data A to data E presented in boxes 612 to 616 shown approximately in the center.

[0030] [Another embodiment of the analysis device 30] 7 shows an analysis device 30' which is another form of analysis device 30. In analysis device 30' shown in FIG. 7, a comparison section 35 and a correction section 36 are added to analysis device 30 shown in FIG.

[0031] When the analysis unit 32 is capable of executing multiple analyses using different processing methods in parallel, the comparison unit 35 compares the results of the multiple analyses. The comparison result is then presented on the presentation unit 34. The user can verify the accuracy of the analysis by checking the comparison result. The analysis unit 32 may also be capable of executing multiple analyses using the same processing method in parallel. As an example, the analysis unit 32 may perform analysis using multiple different software programs that employ OCR processing as a processing method. In this case, the comparison unit 35 may compare the results of the multiple analyses executed by the analysis unit 32 using the multiple different software programs.

[0032] Because OCR processing generates character data by inferring characters from their shapes, if the display is unclear, it may erroneously identify similar-shaped characters. For example, the number "8" may be mistaken for the letter "S." Therefore, when a captured image displays data for multiple items, the correction unit 36 ​​corrects the character data resulting from the OCR processing if the order of the character data types obtained as a result of the OCR processing differs from the order of the types obtained as a result of other OCR processing for the same item. Here, the type of character data refers to numbers, letters, etc. In other words, the order of the character data types differs between data in which the character data is arranged in the order numbers, numbers, letters and numbers. For example, if the character data resulting from the OCR processing is composed of letters and numbers, the character data for the same item often has the same order of types. Therefore, if the order of the character data types differs from that of other OCR results, there is a high possibility that the OCR processing is incorrect. Therefore, the correction unit 36 ​​corrects the character data when there is a high possibility that the OCR processing is incorrect.

[0033] FIG. 8 shows an example of correction. For example, suppose that the analysis result of data C by the analysis unit 32 at a certain timing is "98ST7" as shown in 801, the analysis result by the analysis unit 32 at the next timing is "77ST5" as shown in 802, and the analysis result by the analysis unit 32 at the next timing is "668T5" as shown in 803. As shown in 801 and 802, data C is thought to be represented by "numbers, numbers, alphabetic characters, alphabetic characters, numbers," but in 803 it is represented by "numbers, numbers, numbers, alphabetic characters, numbers." In this case, the correction unit 36 ​​determines that the third number in 803 is likely to be an incorrect alphabetic character, and corrects the third number to the alphabetic character "S" based on the results of 801 and 802. When correcting character data, the correction unit 36 ​​may associate the character data to be corrected with the corrected character data, and store the association in a storage unit (not shown) as a log of the corrections. The log may include information such as a captured image corresponding to the corrected character data and the date and time of the correction. By checking the log, the user can recognize the character recognition rate of the OCR process.

[0034] As described above, the signal processing system 1 according to this embodiment comprises a distributor 11 that distributes a video signal to be displayed on the display device 20, a capture unit 12 that generates an analyzable capture image from the distributed video signal, and an output unit 13 that outputs the capture image to an analysis device 30 that analyzes the capture image.

[0035] This allows the video signal to be distributed, and a captured image to be generated and output from the distributed video signal, so that an image more suitable for analysis than an image taken by a camera can be output to analysis device 30. Since analysis device 30 can analyze the captured image generated from the video signal, it becomes possible to accurately obtain information contained in the image. Therefore, information can be obtained easily and accurately.

[0036] [Variation 1] A signal processing system 1A, which is a modified example of the signal processing system 1, will be described with reference to Fig. 9. Fig. 9 is a schematic diagram showing an overview of the entire signal processing system 1A.

[0037] 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 by a distributor 11 (first distributor) and input to the capture unit 12, and a video signal (second video signal) output from a device control device 10A different from the device control device 10 and displayed on the display device 20A is distributed by a distributor 11A (second distributor) and 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 video signals (first video signal, second video signal) from the two device control devices 10 (10A) are input to the capture unit 12. The capture unit 12 may be switched between inputting the video signal from the device control device 10 and the video signal from the device control device 10A one by one. The capture unit 12 may generate captured 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).

[0038] As a result, even if there are multiple device control devices 10 (10A) and each device control device transmits a video signal to the display device 20 (20A), the video signals can be distributed and analyzed by a single signal processing system 1A.

[0039] The capture unit 12 may also compare the input first and second video signals. As an example, the capture unit 12 may generate two capture images using the first and second video signals and compare common features between the two capture images, such as icons commonly displayed in the two capture images. By comparing the two capture images, the capture unit 12 can verify whether one of the capture images has deteriorated, i.e., whether either the acquired first or second video signal has deteriorated. If either the first or second video signal has deteriorated, the capture unit 12 may reacquire the deteriorated video signal. By performing the above-described process by the capture unit 12, the signal processing system 1A can reduce the possibility of using a deteriorated video signal, thereby further improving the accuracy of reading the capture image.

[0040] The number of video signals input to the capture unit 12 is not limited to two, but may be three or more.

[0041] 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, the capture unit 12 may generate (create) a capture image in the same format. If the capture unit 12 generates the capture image in the same format, the analysis device 30 that analyzes the capture image only needs to analyze the capture image generated in the same format, which makes processing easier.

[0042] [Variation 2] A signal processing system 1B, which is another modified example of the signal processing system 1, will be described with reference to Fig. 10. Fig. 10 is a schematic diagram showing an overall outline of the signal processing system 1B.

[0043] 10, in signal processing system 1B, a video signal output from device control device 10 and displayed on display device 20 is distributed by distributor 11 and input to capture unit 12. A captured image generated by capture unit 12 is output to analysis device 30 via output unit 13 and analyzed by analysis device 30.

[0044] Furthermore, a video signal output from the device control device 10B and displayed on the display device 20B is distributed by a distributor 11B and input to a capture unit 12B. A captured image generated by the capture unit 12B is output to the analysis device 30 via an output unit 13B and analyzed by the analysis device 30.

[0045] 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).

[0046] This allows a single analysis device 30 to analyze video signals transmitted from a plurality of device control devices 10 (10B) that are each transmitted to the display device 20 (20B).

[0047] [Variation 3] A further modified example 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 the further modified example of the signal processing system 1.

[0048] 11, in this modification, a 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.

[0049] The image displayed on display device 20C is captured by imaging device 40A and imaging device 40B, and image data of the image captured by imaging device 40A is sent to analysis device 30A, and image data of the image captured by imaging device 40B is sent to analysis device 30B. Analysis devices 30A and 30B each perform image analysis (e.g., OCR) on the image.

[0050] Because display device 20C has a larger screen size than display device 20, the images captured by imaging device 40A and imaging device 40B can be captured with higher resolution than images captured by capturing the display screen of display device 20. Therefore, the results of analyzing the images captured by imaging device 40A and imaging device 40B are likely to be more accurate than analyzing images captured directly from display device 20.

[0051] In this way, in this modification, analysis can be made more accurate by displaying the captured image generated by the capture unit 12 on the imaging devices 40A and 40B, which have larger screen sizes than the display device 20. Furthermore, the display device 20 needs to be installed close to the equipment control device 10, but unlike the display device 20, the display device 20C can be installed at a location distant from the equipment control device 10. Therefore, the display device 20C can be installed without any spatial restrictions.

[0052] Furthermore, analysis device 30A or analysis device 30B in this modification may include comparison unit 35. Comparison unit 35 may compare an image captured by imaging device 40A or imaging device 40B with a captured image generated by capture unit 12. For example, comparison unit 35 may compare the entire image captured by imaging device 40A or imaging device 40B with the captured image generated by capture unit 12, or may compare only a portion with poor reading accuracy. By having comparison unit 35 perform this comparison, analysis unit 32 can perform analysis using an image that is easy to read, thereby improving the accuracy of reading the image.

[0053] The present disclosure is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present disclosure. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment.

[0054] For example, in the above example, the data analyzed by the analysis unit 32 is presented to the presentation unit 34. However, the analysis device 30 may further include a confirmation unit that confirms the data analyzed by the analysis unit 32. Then, the analysis results may be presented to the presentation unit 34 after confirmation by the confirmation unit.

[0055] The confirmation unit can, for example, verify the analysis results. Furthermore, the confirmation unit can, for example, check the analysis results. When data A to data E are numerical data, the confirmation unit may check data A to data E. Specifically, when monitoring the production status of a specific product, if data A indicates the number of non-defective products, data B indicates the number of defects in defect item 1, data C indicates the number of defects in defect item 2, data D indicates the number of defects in defect item 3, and data E indicates the total number of inspections, the numerical value indicated by data E should be the same 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 check whether the analysis results are correct.

[0056] In the above example, the verification unit verifies the analysis results in the captured image. That is, while the verification unit verifies the analysis results by comparing the data in one analysis result, the verification unit may verify the analysis results by comparing the analysis results of multiple captured images. The verification unit may also verify the analysis results by comparing them with past inspection results. Specifically, when the total number of inspections is output as the analysis result, as in the above example, the verification unit may compare the analysis result with past analysis results and confirm that the value is greater than the past analysis results to determine whether the analysis result is correct. The past analysis results to be compared may be verified data. If the past analysis results to be compared have not been verified, the accuracy may be determined by whether values ​​greater than the past analysis results are output consecutively.

[0057] Furthermore, if the analysis result is determined to be incorrect by the verification performed by the verification unit, the analysis device 30 may store the analysis result in the storage unit, which makes it possible to subsequently verify the malfunction of the analysis unit.

[0058] 〔summary〕 The signal processing system 1, 1A, 1B according to aspect 1 of the present disclosure includes a distributor 11, 11A, 11B that distributes video signals to be displayed on display devices 20, 20A, 20B, 20C, a capture unit 12, 12A, 12B that generates an analyzable capture image from the distributed video signals, and an output unit 13, 13B that outputs the capture image to an analysis device 30, 30', 30A, 30B that analyzes the capture image.

[0059] The signal processing system 1, 1A, 1B according to aspect 2 of the present disclosure is the same as in aspect 1, and includes the analysis devices 30, 30', 30A, 30B, which are capable of performing multiple analyses and may include a comparison unit 35 that compares the results of the multiple analyses.

[0060] In the signal processing systems 1, 1A, and 1B according to a third aspect of the present disclosure, in the second aspect, the analysis devices 30, 30', 30A, and 30B may be capable of performing a plurality of analyses using different processing methods.

[0061] In the signal processing system 1, 1A, 1B according to aspect 4 of the present disclosure, in any one of aspects 1 to 3, the capture unit 12, 12A, 12B captures the video signal at a predetermined frequency, and the predetermined frequency may be lower than the refresh rate of the display device 20, 20A, 20B, 20C.

[0062] In the signal processing system 1, 1A, 1B according to aspect 5 of the present disclosure, in aspect 4, the analysis device 30, 30', 30A, 30B may analyze only those captured images that satisfy predetermined conditions among the generated captured images.

[0063] In the signal processing system 1, 1A, 1B according to aspect 6 of the present disclosure, in aspect 5, the analysis device 30, 30', 30A, 30B may analyze only the captured image that is different from the previous captured image among the generated captured images.

[0064] In the signal processing system 1, 1A, 1B according to a seventh aspect of the present disclosure, in any one of the first to sixth aspects, the analysis device 30, 30', 30A, 30B may analyze only a predetermined region of the captured image.

[0065] In the signal processing system 1, 1A, 1B according to aspect 8 of the present disclosure, in any of aspects 1 to 7, the analysis device 30, 30', 30A, 30B may generate character data from the captured image by OCR (Optical Character Recognition / Reader) processing.

[0066] In the signal processing system 1, 1A, 1B according to aspect 9 of the present disclosure, in aspect 8, when the captured image displays multiple items of data, the analysis device 30, 30', 30A, 30B may be provided with a correction unit 36 ​​that corrects the character data when the arrangement of types of character data obtained as a result of OCR processing differs from the arrangement obtained as a result of other OCR processing for the same item.

[0067] The signal processing system 1, 1A, 1B according to aspect 10 of the present disclosure, in any of aspects 1 to 9, may include a first distributor (distributor 11) that distributes a first video signal and a second distributor (distributor 11A) that distributes a second video signal, and the capture unit 12, 12A, 12B may generate the capture image from both the video signal distributed by the first distributor and the video signal distributed by the second distributor.

[0068] In the signal processing system 1, 1A, 1B according to aspect 11 of the present disclosure, in any of aspects 1 to 10, the capture units 12, 12A, 12B may create the captured image in the same manner regardless of the format of the multiple video signals.

[0069] A signal processing method according to aspect 12 of the present disclosure is a signal processing method for generating an image to be analyzed, which includes distributors 11, 11A, and 11B that distribute video signals to be displayed on display devices 20, 20A, 20B, and 20C, and includes a distribution step of distributing the video signals using distributors 11, 11A, and 11B, a capture step of generating an analyzable capture image from the distributed video signals, and an output step of outputting the capture image to an analysis device that analyzes the capture image. [Explanation of symbols]

[0070] 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 Department 32 Analysis Department 33 Image judgment unit 34 Presentation part 35 Comparison section 36 Correction section 40, 40A, 40B Imaging device

Claims

1. 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; an output unit that outputs the captured image to an analysis device that analyzes the captured image, the analysis device generates character data from the captured image by OCR (Optical Character Recognition / Reader) processing; If the captured image displays multiple items of data, the analysis device includes a correction unit that corrects the character data when a sequence of character data types obtained as a result of the OCR processing differs from a sequence obtained as a result of other OCR processing for the same item. Signal processing system.

2. The analysis device is provided, 2. The signal processing system according to claim 1, wherein the analysis device is capable of performing a plurality of analyses and comprises a comparison unit that compares the results of the plurality of analyses.

3. The signal processing system according to claim 2 , wherein the analysis device is capable of performing a plurality of analyses using different processing methods.

4. the capture unit captures the video signal at a predetermined frequency, 2. The signal processing system according to claim 1, wherein the predetermined frequency is less than a refresh rate of the display device.

5. The signal processing system according to claim 4 , wherein the analysis device analyzes only the captured images that satisfy a predetermined condition among the generated captured images.

6. The signal processing system according to claim 5 , wherein the analysis device analyzes only the captured image that is different from the immediately preceding captured image, among the generated captured images.

7. The signal processing system according to claim 1 , wherein the analysis device analyzes only a predetermined region of the captured image.

8. a first distributor that distributes a first video signal; a second distributor that distributes the second video signal; The signal processing system according to any one of claims 1 to 7, wherein the capture unit generates the capture image from both the video signal distributed by the first distributor and the video signal distributed by the second distributor.

9. 2. The signal processing system according to claim 1, wherein the capture unit creates the captured image in the same manner regardless of the formats of the plurality of video signals.

10. 1. A signal processing method for generating an image to be analyzed, comprising: a distributing step of distributing the video signal by a distributor to be displayed on a display device; a capture step of generating an analyzable captured image from the distributed video signal; an output step of outputting the captured image to an analysis device that analyzes the captured image; moreover, generating character data from the captured image by an OCR (Optical Character Recognition / Reader) process by the analysis device; If the captured image displays multiple items of data, and when the sequence of character data types obtained as a result of the OCR processing is different from the sequence obtained as a result of other OCR processing for the same item, the analysis device corrects the character data. Signal processing methods.

Images