CN103067736B - Automatic test system based on character recognition - Google Patents

Automatic test system based on character recognition Download PDF

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Publication number
CN103067736B
CN103067736B CN201210558206.7A CN201210558206A CN103067736B CN 103067736 B CN103067736 B CN 103067736B CN 201210558206 A CN201210558206 A CN 201210558206A CN 103067736 B CN103067736 B CN 103067736B
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test
test terminal
image
display
area image
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CN103067736A (en
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罗忠辉
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Guangzhou radium Intelligent Technology Co., Ltd.
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Guangzhou Shiyuan Electronics Thecnology Co Ltd
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Abstract

The invention discloses an automatic test system based on character recognition. The automatic test system based on character recognition comprises a testing terminal and an image collecting device. The image collecting device is used for collecting the actually output image of a display device to be tested, and transmitting the actually output image to the testing terminal. The testing terminal is further used for intercepting a specified area image of the actually output image, recognizing an actual character string of output information of the specified area image and judging whether the character string is the same as a corresponding standard character string. If the actual character string is the same as the corresponding standard character string, the information that a test is normal is produced; if the actual character string is not the same as the corresponding standard character string, the information that the test is abnormal is produced. The automatic test system based on character recognition is automatic, fast and simple. Reliability of testing efficiency and the test result of the display device is improved, and research and development time and cost of the display device can be further reduced effectively.

Description

A kind of Auto-Test System based on character recognition
Technical field
The present invention relates to display device technical field of measurement and test, particularly relate to a kind of Auto-Test System based on character recognition.
Background technology
At present, the product in most digital television techniques field, as display, television set, Set Top Box, advertisement machine etc., in its development process, in order to ensure the systematic function of product, needs to carry out performance test to its every entry usually.
Display device, refer to the equipment with the form transmission of visible ray and process information, it is by Infrared remote controller, the control of keypad or the Internet, video Low Voltage Differential Signal (Low-Voltage Differential Signaling is provided, be called for short LVDS), digital visual interface (Digital Video Interface, be called for short DVI) signal, HDMI (High Definition Multimedia Interface) (High Definition Multimedia Interface, be called for short HDMI) signal or Composite Video Baseband Signal (Composite Video Broadcast Signal, be called for short CVBS) etc. the transmission of signal.At present, display device mainly comprises display, television set and various video playing terminal etc.
Because the test process of the receptivity index of display device is very loaded down with trivial details, be mainly reflected in tested entries various, and the aspect such as test process is complicated, test form is various.The test process of major part display device is all simple and repeat, and by operation push-button plate or Infrared remote controller etc. control the test of each entry of display device artificially, and whether the output image subjectively judging this display device conforms to for indicating with the setting of input signal and expection, whether the systematic function detecting this display device is normal, obviously, this method of testing length consuming time, and test result receives the restriction of the subjective factor (the energy intensity etc. as tester) of tester, be very easy in test process occur test leakage and survey by mistake.
In the R&D process of whole product, the method for testing of manual control consumes a large amount of human resources, and causes that research and development of products cost is high, the cycle is long, and test result is unreliable, even may cause degradation serious consequence under product quality.
Summary of the invention
Technical problem to be solved by this invention is, provides a kind of Auto-Test System of display device, realizes the fast automatic test of the polynomial system performance parameter to various display device to be measured, improves the testing efficiency to display device.
For solving above technical problem, the invention provides a kind of Auto-Test System based on character recognition, comprising test terminal and image capture device;
Described test terminal stores the standard characters of the output information of display device to be measured;
Described test terminal is used for transmitting control signal to described display device to be measured, controls described display device output display information to be measured;
Described actual output image for gathering the actual output image of described display device to be measured, and is sent to described test terminal by described image capture device;
Described test terminal also for after receiving described actual output image, intercepts the appointed area image of described actual output image;
The actual characters string of the output information of described appointed area image also for carrying out analyzing and processing to described appointed area image, is identified in described test terminal;
Whether described test terminal is also identical with corresponding standard characters for judging described actual characters string;
If described actual characters string is identical with corresponding standard characters, then described test terminal produces test normal information; If described actual characters string is not identical with corresponding standard characters, then described test terminal produces test abnormal information;
Described test terminal is also for preserving described test normal information or test abnormal information.
In one implementation, described test terminal also for after receiving described actual output image, intercepts the appointed area image of described actual output image, comprising: described test terminal is preset with the positional information of target area image; Sectional drawing function is run in described test terminal, and according to the positional information of described target area image, the respective regions image gathering described actual output image is described appointed area image.
In another kind of implementation, described test terminal also for after receiving described actual output image, intercepts the appointed area image of described actual output image, comprising: described test terminal is preset with the color coding value of target area image; Described test terminal is analyzed the color coding value of described actual output image after receiving described actual output image, and the intercepting area image consistent with the color coding value of described target area image is described appointed area image.
Further, described test terminal is also for carrying out analyzing and processing to described appointed area image, identify the actual characters string of the output information of described appointed area image, comprise: described test terminal adopts OCR to carry out analyzing and processing to described appointed area image, identifies the actual characters string of the output information of described appointed area image.
Further, the described Auto-Test System based on character recognition, also comprises television signal generator;
Described display device to be measured is radio TV signals receiving terminal;
Described test terminal also sends television measuring signal to described radio TV signals receiving terminal for controlling described television signal generator;
Described radio TV signals receiving terminal is also for being converted to corresponding output image by described television measuring signal.
A kind of Auto-Test System based on character recognition provided by the invention, by identifying the actual characters string of the display information representing described actual output image, and comparing actual characters string and corresponding standard characters, when described actual characters string is identical with corresponding standard characters, then described test terminal judges that the test of this entry is normal, produce test normal information, the test of next entry can be automatically performed; When described actual characters string and corresponding standard characters are not identical, then described test terminal judges that the test of this entry is abnormal, produce test abnormal information, and can the retest of this entry be automatically performed according to the instruction of test terminal or perform the test of next entry.Provided by the present invention a kind of based in the Auto-Test System of character recognition, as long as preset the displayed entries of required test before described display device test to be measured in test terminal, after system cloud gray model, namely described test terminal automatically performs whole test process, and keeps test result.
Accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of a kind of Auto-Test System based on character recognition provided by the invention;
Fig. 2 is the structural representation of another embodiment of a kind of Auto-Test System based on character recognition provided by the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.
See Fig. 1, it is the structural representation of an embodiment of a kind of Auto-Test System based on character recognition provided by the invention.
In the present embodiment, described a kind of Auto-Test System based on character recognition comprises test terminal 100 and image capture device 200.Wherein, described test terminal 100 stores the standard characters of the output information of display device 300 to be measured.This standard characters refers to the character string of the various desirable output information for representing display device 300 to be measured.
Described test terminal 100, for transmitting control signal to described display device 300 to be measured, controls described display device to be measured 300 output display information.
During concrete enforcement, after the automatic test that test terminal 100 starts described display device 300 to be measured, the instruction of the control signal that display device 300 to be measured sends according to described test terminal 100, exports corresponding display interface, and this display interface includes various actual output information.
Described actual output image for gathering the actual output image of described display device to be measured 300, and is sent to described test terminal 100 by described image capture device 200.
In the present embodiment, image capture device 200 comprises signals collecting hardware and related software driver.Particularly, use the signals collecting hardware being provided with related software driver, absorb the information of the corresponding display interface that display device 300 to be measured exports according to the control of test terminal 100, and the information of the display interface of picked-up gained is converted to data image signal, form actual output image.
Particularly, described actual output image adopts the accessible picture format of computer to preserve, as BMP(Bitmap), JPEG(Joint Photographic Experts Group), GIF(Graphics Interchange Format) and PNG(Portable Network Graphics) etc. the picture of form.
In the present embodiment, during concrete enforcement, digital visual interface DVI(Digital Video Interface can be adopted) data acquisition card, gather the actual output video of display device 300 to be measured, again by each frame of digital picture signal in this actual output video, send test terminal 100 to and process.During concrete enforcement, image capture device 200 can also adopt other image pick-up cards or first-class realization of making a video recording.
Described test terminal 100 also for after receiving described actual output image, intercepts the appointed area image of described actual output image.
The actual characters string of the output information of described appointed area image also for carrying out analyzing and processing to described appointed area image, is identified in described test terminal 100.
Whether described test terminal 100 is also identical with corresponding standard characters for judging described actual characters string.
If described actual characters string is identical with corresponding standard characters, then described test terminal 100 produces test normal information; If described actual characters string is not identical with corresponding standard characters, then described test terminal 100 produces test abnormal information.
Described test terminal 100 is also for preserving described test normal information or test abnormal information.
See Fig. 2, it is the structural representation of another embodiment of a kind of Auto-Test System based on character recognition provided by the invention.
In the present embodiment, the described Auto-Test System based on character recognition, except comprising test terminal 100 and image capture device 200, also comprises television signal generator 400.
Described display device to be measured is radio TV signals receiving terminal 500.
Described test terminal 100 also sends television measuring signal to described radio TV signals receiving terminal 500 for controlling described television signal generator 400.
Described radio TV signals receiving terminal 500 is also for being converted to corresponding output image by described television measuring signal.
In the present embodiment, identical with operation principle based on the effect of corresponding module in the Auto-Test System of character recognition with shown in Fig. 1 of described test terminal 100 and image capture device 200.
Particularly, described test terminal 100 is also for after receiving described actual output image, and intercept the appointed area image of described actual output image, in one implementation, its adoptable concrete methods of realizing comprises:
Described test terminal 100 is preset with the positional information of target area image.Wherein, described target area image is test terminal 100 is performing the entry region of test image according to predetermined registration operation instruction.
Sectional drawing function is run in described test terminal 100, and according to the positional information of described target area image, the respective regions image gathering described actual output image is described appointed area image.
In another kind of implementation, described test terminal 100 is also for after receiving described actual output image, and intercept the appointed area image of described actual output image, its adoptable concrete methods of realizing comprises:
Described test terminal 100 is preset with the color coding value of target area image;
After described test terminal 100 receives described actual output image, the color coding value of described actual output image is analyzed, and the intercepting area image consistent with the color coding value of described target area image is described appointed area image.
In the present embodiment, the display interface of image capture device 200 pairs of radio TV signals receiving terminals 500 carries out sectional drawing, and the data image signal collected can be described as bitmap (Bit Map) image.Bitmap images is made up of multiple point being called " pixel ", and these pixels can carry out different arrangements and dyeing shows pattern to form.When dyeing to pixel, each pixel carries out color coding according to certain color-code model, and correspondingly, each pixel correspond to one or more color coding value.
In the present embodiment, the region at default color coding value place by detecting the color coding value of each pixel of described actual output image, and is found in test terminal 100, and its sectional drawing is saved as described appointed area image.
In the present embodiment, the actual characters string of the output information of described appointed area image also for carrying out analyzing and processing to described appointed area image, is identified in described test terminal 100, and its adoptable a kind of implementation method, comprising:
Described test terminal 100 adopts OCR to carry out analyzing and processing to described appointed area image, identifies the actual characters string of the output information of described appointed area image.
Optical character identification (Optical Character Recognition) technology is called for short again OCR technology, its dark, bright contrast of character mainly through detected image prints, thus determine the shape of character, then with character identifying method, the shape of character is translated into computword.In brief, optical character identification OCR refers to and carries out analyzing and processing to picture signal, obtains the process of word and other layout information in images.The process exported from image to result, the processes such as OCR technology must input through image, image pre-treatment, character features extraction, matching identification, correction, finally just export recognition result.The leading indicator weighing an OCR systematic function quality has: the friendly of misclassification rate, recognition speed, user interface, the stability of product, ease for use and feasibility etc.
As the preferred implementation of one, test terminal 100 adopts OCR technology, the Word message of described appointed area image is identified, wherein, the actual characters string that described test terminal 100 identifies can be the accessible literal code character of computer, comprises simplified (or traditional font) Chinese text, Latin alphabet etc.
During concrete enforcement, when the literal code character identified when described test terminal 100 is identical with target text code character, then described test terminal 100 judges that this entry is tested successfully, generates test normal information; When the literal code character identified when described test terminal 100 is not identical with target text code character, then described test terminal 100 judges that the test of this entry is abnormal, generates test abnormal information.
Described test terminal 100 is by test result, and namely test successful information or test abnormal information saving, engineering staff can inquire about this test result information at any time, to investigate the systematic function situation of display device.
For example, test terminal 100 sends a control signal to radio TV signals receiving terminal 500, requires that radio TV signals receiving terminal 500 exports the display interface with " Blue Screen " word; Radio TV signals receiving terminal 500 exports certain signal (" Blue Screen " i.e. target text code character, display device not must correctly export this target text) according to described control signal; Test terminal 100 adopts OCR technology to identify the actual literal code character of described appointed area image, and described actual literal code character and target text code character " Blue Screen " is compared.If the actual literal code character that test terminal 100 identifies is " Blue Screen ", then described test terminal 100 exports test normal information, namely described radio TV signals receiving terminal 500 after tested after, systematic function is normal.Otherwise then described test terminal 100 exports test abnormal information, namely radio TV signals receiving terminal 500 after tested after, systematic function is abnormal.
The embodiment of the present invention provide a kind of based in the Auto-Test System of character recognition, described test terminal 100 presets the operational order of the whole test process of display device 300 to be measured, test terminal 100 automatically performs described operational order by Control timing sequence, thus automatically completes described whole test process.
During concrete enforcement, described test terminal can be provided with control signal transducer, and described control signal transducer is used for described operational order to be converted to the receivable control signal of described display device to be measured 300; Described display device to be measured exports according to described control signal and shows information accordingly.
In one implementation, described control signal transducer is infrared remote-controlled signal reflector, and described display device is also provided with corresponding infrared remote-controlled signal receiver.Described operational order is converted to infrared remote-controlled signal by described Infrared remote controller, and described infrared remote-controlled signal is sent to the infrared remote control receiver in described display device to be measured 300; Described display device to be measured 300 exports according to described infrared remote-controlled signal and shows information accordingly.
In another kind of implementation, described control signal transducer is keypad, and described operational order is converted to key set code by described keypad, and described key set code is sent to described display device to be measured 300 by serial line interface; Described display device to be measured 300 exports according to described key set code and shows information accordingly.
In another implementation, described control signal transducer is the network communications port being provided with respective drive software program, described operational order is converted to network transmission signal by described network communications port, and pass through the mode of wire communication or radio communication, described network transmission signal is sent to described display device to be measured 300; Described display device to be measured 300 exports according to described network transmission signal and shows information accordingly.
A kind of Auto-Test System based on character recognition that the embodiment of the present invention provides, is applicable to test the test with the function entry of the display device of character string display information.Test terminal only needs the actual full frame by described display device to be measured exports to gather, again sectional drawing and character analysis are carried out to the region of band word, identify the actual characters string of the appointed area image in the actual output image at brake entry place, if actual characters string is identical with corresponding target string, then test terminal judges that the display of this entry is normal, can automatically perform the test of next function entry; When described actual characters string and corresponding standard characters are not identical, then described test terminal judges that the test of this entry is abnormal, can automatically perform the retest of this entry according to the instruction of test terminal or perform the test of next entry.A kind of Auto-Test System based on character recognition that the embodiment of the present invention provides is automatic, quick, simple, improves the testing efficiency of display device and the reliability of test result, and effectively reduces research and development time and the R&D costs of display device further.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.

Claims (4)

1. based on an Auto-Test System for character recognition, it is characterized in that, comprise test terminal, image capture device and television signal generator; Described test terminal stores the standard characters of the output information of display device to be measured;
Described test terminal is used for transmitting control signal to described display device to be measured, controls described display device output display information to be measured; Described test terminal presets the operational order of the whole test process of display device to be measured;
Described test terminal is provided with control signal transducer, and described control signal transducer is used for described operational order to be converted to the receivable control signal of described display device to be measured; Described display device to be measured exports according to described control signal and shows information accordingly;
Described actual output image for gathering the actual output image of described display device to be measured, and is sent to described test terminal by described image capture device;
Described test terminal also for after receiving described actual output image, intercepts the appointed area image of described actual output image;
The actual characters string of the output information of described appointed area image also for carrying out analyzing and processing to described appointed area image, is identified in described test terminal;
Whether described test terminal is also identical with corresponding standard characters for judging described actual characters string;
If described actual characters string is identical with corresponding standard characters, then described test terminal produces test normal information; If described actual characters string is not identical with corresponding standard characters, then described test terminal produces test abnormal information;
Described test terminal is also for preserving described test normal information or test abnormal information;
Described display device to be measured is radio TV signals receiving terminal;
Described test terminal also sends television measuring signal to described radio TV signals receiving terminal for controlling described television signal generator;
Described radio TV signals receiving terminal is also for being converted to corresponding output image by described television measuring signal.
2. as claimed in claim 1 based on the Auto-Test System of character recognition, it is characterized in that, described test terminal also for after receiving described actual output image, intercepts the appointed area image of described actual output image, comprising:
Described test terminal is preset with the positional information of target area image;
Sectional drawing function is run in described test terminal, and according to the positional information of described target area image, the respective regions image gathering described actual output image is described appointed area image.
3. as claimed in claim 1 based on the Auto-Test System of character recognition, it is characterized in that, described test terminal also for after receiving described actual output image, intercepts the appointed area image of described actual output image, comprising:
Described test terminal is preset with the color coding value of target area image;
Described test terminal is analyzed the color coding value of described actual output image after receiving described actual output image, and the intercepting area image consistent with the color coding value of described target area image is described appointed area image.
4. the Auto-Test System based on character recognition as described in any one of claims 1 to 3, it is characterized in that, described test terminal also for carrying out analyzing and processing to described appointed area image, being identified the actual characters string of the output information of described appointed area image, being comprised:
Described test terminal adopts OCR to carry out analyzing and processing to described appointed area image, identifies the actual characters string of the output information of described appointed area image.
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