CN103067736A - Automatic test system based on character recognition - Google Patents
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- 238000000034 method Methods 0.000 description 20
- 238000012015 optical character recognition Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 6
- 230000009897 systematic effect Effects 0.000 description 6
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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
Technical field
The present invention relates to the display device technical field of measurement and test, relate in particular to a kind of Auto-Test System based on character recognition.
Background technology
At present, the product in most digital television techniques field such as display, television set, set-top box, advertisement machine etc., in its development process, in order to guarantee the systematic function of product, need to carry out performance test to its every clauses and subclauses usually.
Display device, refer to the form transmission of visible light and the equipment of process information, it can pass through 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, abbreviation HDMI) transmission of the signals such as signal or composite video broadcast singal (Composite Video Broadcast Signal is called for short CVBS).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, it is various to be mainly reflected in tested entries, and the aspect such as test process is complicated, test form is various.The test process of most of display device all is simply to repeat, and come the test of each clauses and subclauses of control display equipment by artificially operation push-button plate or Infrared remote controller etc., and whether the output image of subjectively judging this display device conforms to the setting of input signal and expection is sign, whether the systematic function that detects this display device is normal, obviously, this method of testing length consuming time, and test result has been subject to the restriction of tester's subjective factor (such as tester's energy intensity etc.), is very easy to occur test leakage in the test process and mistake is surveyed.
In the R﹠D process of whole product, the method for testing of manual control has consumed a large amount of human resources, and causes that the research and development of products cost is high, the cycle is long, and test result is unreliable, even may cause degradation serious consequence under the product quality.
Summary of the invention
Technical problem to be solved by this invention is, a kind of Auto-Test System of display device is provided, and realizes the fast automatic test to the polynomial system performance parameter of various display devices 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, comprise 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 image capture device is used for gathering the actual output image of described display device to be measured, and described actual output image is sent to described test terminal;
After described test terminal also is used for receiving described actual output image, intercept the appointed area image of described actual output image;
Described test terminal also is used for described appointed area image is carried out analyzing and processing, identifies the actual characters string of the output information of described appointed area image;
Described test terminal is used for also judging whether described actual characters string is identical with corresponding standard characters;
If described actual characters string is identical with corresponding standard characters, then described test terminal produces the test normal information; If described actual characters string is not identical with corresponding standard characters, then described test terminal produces the test abnormal information;
Described test terminal also is used for preserving described test normal information or test abnormal information.
In one implementation, after described test terminal also is used for receiving described actual output image, intercept the appointed area image of described actual output image, comprising: described test terminal is preset with the positional information of target area image; Described test terminal operation sectional drawing function, according to the positional information of described target area image, the respective regions image that gathers described actual output image is described appointed area image.
In another kind of implementation, after described test terminal also is used for receiving described actual output image, intercept the appointed area image of described actual output image, comprising: described test terminal is preset with the color coding value of target area image; After described test terminal 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.
Further, described test terminal also is used for described appointed area image is carried out analyzing and processing, identify the actual characters string of the output information of described appointed area image, comprise: described test terminal adopts OCR that described appointed area image is carried out analyzing and processing, identifies the actual characters string of the output information of described appointed area image.
Further, described Auto-Test System based on character recognition also comprises television signal generator;
Described display device to be measured is the radio TV signals receiving terminal;
Described test terminal also is used for controlling described television signal generator and sends television measuring signal to described radio TV signals receiving terminal;
Described radio TV signals receiving terminal also is used for described television measuring signal is converted to corresponding output image.
A kind of Auto-Test System based on character recognition provided by the invention, by identifying the actual characters string of the demonstration information that represents 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 these clauses and subclauses is normal, produce the test normal information, can automatically perform the test of next clauses and subclauses; When described actual characters string is not identical with corresponding standard characters, then described test terminal judges that the test of these clauses and subclauses is undesired, produce the test abnormal information, and can automatically perform the retest of these clauses and subclauses according to the instruction of test terminal or carry out the test of next clauses and subclauses.In a kind of Auto-Test System based on character recognition provided by the present invention, as long as before described display device test to be measured, preset the displayed entries of required test in the test terminal, after system's operation, described test terminal namely automatically performs whole test process, and keeps test result.
Description of drawings
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 invention, the technical scheme in the embodiment of the invention is clearly and completely described.
Referring to 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 be used to the various desirable output informations that represent display device 300 to be measured.
Described test terminal 100 is used for transmitting control signal to described display device 300 to be measured, controls described display device to be measured 300 output display information.
During implementation, after the 100 automatic tests of startup to described display device 300 to be measured of test terminal, corresponding display interface is exported in the indication of the control signal that display device 300 to be measured sends according to described test terminal 100, and this display interface includes various actual output informations.
Described image capture device 200 is used for gathering the actual output image of described display device to be measured 300, and described actual output image is sent to described test terminal 100.
In the present embodiment, image capture device 200 comprises signals collecting hardware and related software driver.Particularly, use is equipped with the signals collecting hardware of 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 that will absorb the display interface of gained is converted to data image signal, forms actual output image.
Particularly, described actual output image adopts the accessible picture format of computer to preserve, such 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 implementation, can adopt digital visual interface DVI(Digital Video Interface) data acquisition card, gather the actual output video of display device 300 to be measured, each frame of digital picture signal in again should actual output video sends test terminal 100 to and processes.During implementation, image capture device 200 can also adopt other image pick-up cards or first-class realization of making a video recording.
After described test terminal 100 also is used for receiving described actual output image, intercept the appointed area image of described actual output image.
Described test terminal 100 also is used for described appointed area image is carried out analyzing and processing, identifies the actual characters string of the output information of described appointed area image.
Described test terminal 100 is used for also judging whether described actual characters string is identical with corresponding standard characters.
If described actual characters string is identical with corresponding standard characters, then described test terminal 100 produces the test normal information; If described actual characters string is not identical with corresponding standard characters, then described test terminal 100 produces the test abnormal information.
Described test terminal 100 also is used for preserving described test normal information or test abnormal information.
Referring to 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, described Auto-Test System based on character recognition also comprises television signal generator 400 except comprising test terminal 100 and image capture device 200.
Described display device to be measured is radio TV signals receiving terminal 500.
Described test terminal 100 also is used for controlling described television signal generator 400 and sends television measuring signal to described radio TV signals receiving terminal 500.
Described radio TV signals receiving terminal 500 also is used for described television measuring signal is converted to corresponding output image.
In the present embodiment, described test terminal 100 is identical with effect and operation principle based on corresponding module in the Auto-Test System of character recognition shown in Figure 1 with image capture device 200.
Particularly, after described test terminal 100 also is used for receiving described actual output image, 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 the clauses and subclauses region of test is being carried out in test terminal 100 according to the predetermined registration operation instruction image.
Described test terminal 100 operation sectional drawing functions, according to the positional information of described target area image, the respective regions image that gathers described actual output image is described appointed area image.
In another kind of implementation, after described test terminal 100 also is used for receiving described actual output image, 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 200 pairs of radio TV signals receiving terminals 500 of image capture device carries out sectional drawing, and the data image signal that collects can be described as bitmap (Bit Map) image.Bitmap images is comprised of the point of a plurality of being called " pixel ", and these pixels can carry out different arrangements and dyeing shows pattern to consist of.When pixel was dyeed, each pixel carried out color coding according to certain color-code model, correspondingly, each pixel corresponding one or more color coding values.
In the present embodiment, the color coding value of each pixel that test terminal 100 can be by detecting described actual output image, and find the zone at default color coding value place is with its sectional drawing and save as described appointed area image.
In the present embodiment, described test terminal 100 also is used for described appointed area image is carried out analyzing and processing, identifies the actual characters string of the output information of described appointed area image, and its adoptable a kind of implementation method comprises:
Described test terminal 100 adopts OCR that described appointed area image is carried out analyzing and processing, 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 the OCR technology, it is dark, the bright contrast by the character printed on the detected image mainly, thereby 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 picture signal is carried out analyzing and processing, obtains the process of literal and other layout information in images.The process of output from the image to result, the OCR technology must through processes such as image input, image pre-treatment, character features extraction, matching identification, corrections, just be exported recognition result at last.The leading indicator of 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 a kind of preferred implementation, the OCR technology is adopted in test terminal 100, Word message to 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, the Latin alphabet etc.
During implementation, when the literal code character that identifies when described test terminal 100 was identical with the target text code character, then described test terminal 100 judged that these clauses and subclauses tests successfully, and normal information is tested in generation; When the literal code character that identifies when described test terminal 100 was not identical with the target text code character, then described test terminal 100 judged that the test of these clauses and subclauses is unusual, generates the test abnormal information.
Described test terminal 100 is test result, namely tests successful information or the test abnormal information is preserved, and the 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 for radio TV signals receiving terminal 500, requires 500 outputs of radio TV signals receiving terminal with the display interface of " Blue Screen " literal; Radio TV signals receiving terminal 500 is according to the certain signal (" Blue Screen " is the target text code character, and display device is not correctly to export this target text) of described control signal output; Test terminal 100 employing OCR technology identify the actual literal code character of described appointed area image, and described actual literal code character and target text code character " Blue Screen " are compared.If the actual literal code character that test terminal 100 identifies is " Blue Screen ", described test terminal 100 output test normal information then, namely described radio TV signals receiving terminal 500 after tested after, systematic function is normal.Otherwise, described test terminal 100 output test abnormal informations then, namely radio TV signals receiving terminal 500 after tested after, systematic function is unusual.
In a kind of Auto-Test System based on character recognition that the embodiment of the invention provides, described test terminal 100 presets the operational order of the whole test process of display device 300 to be measured, test terminal 100 can automatically perform described operational order by the control sequential, thereby automatically finishes described whole test process.
During implementation, described test terminal can be provided with the control signal transducer, and described control signal transducer is used for described operational order is converted to described display device to be measured 300 receivable control signals; Described display device to be measured is exported corresponding demonstration information according to described control signal.
In one implementation, described control signal transducer is the infrared remote-controlled signal reflector, and described display device also is provided with corresponding infrared remote-controlled signal receiver.Described Infrared remote controller is converted to infrared remote-controlled signal with described operational order, and described infrared remote-controlled signal is sent to infrared remote control receiver in the described display device to be measured 300; Described display device to be measured 300 is exported corresponding demonstration information according to described infrared remote-controlled signal.
In another kind of implementation, described control signal transducer is keypad, and described keypad is converted to key set code with described operational order, 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 is exported corresponding demonstration information according to described key set code.
In another implementation, described control signal transducer is the network service port that the respective drive software program is installed, described network service port is converted to network transmission signal with described operational order, and the mode by 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 is exported corresponding demonstration information according to described network transmission signal.
A kind of Auto-Test System based on character recognition that the embodiment of the invention provides is applicable to test the test with the function clauses and subclauses of the display device of character string display information.The test terminal only need to gather the actual full frame of described display device output to be measured, again to carrying out sectional drawing and character analysis with the zone of literal, identify the actual characters string of the appointed area image in the actual output image at brake clauses and subclauses place, if the actual characters string is identical with corresponding target string, then the test terminal judges that these clauses and subclauses show normally, can automatically perform the test of next function clauses and subclauses; When described actual characters string was not identical with corresponding standard characters, then described test terminal judged that the test of these clauses and subclauses is undesired, can automatically perform the retest of these clauses and subclauses according to the instruction of test terminal or carry out the test of next clauses and subclauses.A kind of Auto-Test System based on character recognition that the embodiment of the invention provides is automatic, quick, simple, has improved the testing efficiency of display device and the reliability of test result, and has effectively reduced further research and development time and the R﹠D costs of display device.
The above is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also are considered as protection scope of the present invention.
Claims (5)
1. the Auto-Test System based on character recognition is characterized in that, comprises 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 image capture device is used for gathering the actual output image of described display device to be measured, and described actual output image is sent to described test terminal;
After described test terminal also is used for receiving described actual output image, intercept the appointed area image of described actual output image;
Described test terminal also is used for described appointed area image is carried out analyzing and processing, identifies the actual characters string of the output information of described appointed area image;
Described test terminal is used for also judging whether described actual characters string is identical with corresponding standard characters;
If described actual characters string is identical with corresponding standard characters, then described test terminal produces the test normal information; If described actual characters string is not identical with corresponding standard characters, then described test terminal produces the test abnormal information;
Described test terminal also is used for preserving described test normal information or test abnormal information.
2. the Auto-Test System based on character recognition as claimed in claim 1 is characterized in that, after described test terminal also is used for 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;
Described test terminal operation sectional drawing function, according to the positional information of described target area image, the respective regions image that gathers described actual output image is described appointed area image.
3. the Auto-Test System based on character recognition as claimed in claim 1 is characterized in that, after described test terminal also is used for 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;
After described test terminal 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.
4. such as each described Auto-Test System based on character recognition of claim 1 ~ 3, it is characterized in that, described test terminal also is used for described appointed area image is carried out analyzing and processing, identifies the actual characters string of the output information of described appointed area image, comprising:
Described test terminal adopts OCR that described appointed area image is carried out analyzing and processing, identifies the actual characters string of the output information of described appointed area image.
5. the Auto-Test System based on character recognition as claimed in claim 4 is characterized in that, also comprises television signal generator;
Described display device to be measured is the radio TV signals receiving terminal;
Described test terminal also is used for controlling described television signal generator and sends television measuring signal to described radio TV signals receiving terminal;
Described radio TV signals receiving terminal also is used for described television measuring signal is converted to corresponding output image.
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