CN1361513A - Opened color video display function detecting system and method - Google Patents

Opened color video display function detecting system and method Download PDF

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Publication number
CN1361513A
CN1361513A CN 00136287 CN00136287A CN1361513A CN 1361513 A CN1361513 A CN 1361513A CN 00136287 CN00136287 CN 00136287 CN 00136287 A CN00136287 A CN 00136287A CN 1361513 A CN1361513 A CN 1361513A
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display
test
video
measured
signal
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CN 00136287
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CN1124587C (en
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王欣刚
王延杰
顾海军
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Changchun Institute of Optics Fine Mechanics and Physics of CAS
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Changchun Institute of Optics Fine Mechanics and Physics of CAS
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Abstract

The present invention relates to the detecting technology of video display. The opened color video display function detecting system consists of test diagram library for testing spatial resolution and chroma indexes; industrial control computer containing image collecting card; video signal converter; tested display to receive the video signal from the video signal converter; video camera to take the image of the tested display and return the image to the computer for processing; and printer to print the test result. The opened use of the said system can test resolution and chroma indexes of color display easily.

Description

Opened color video display function detecting system and method
The invention belongs to video display detection system and method and technology field.
Along with developing rapidly of computer industry, color TV trade, the black and white of all size or color monitor and colour TV are used more and more widely, and quantity is big unprecedented.In the past, resolution and gray scale to black and white display had national standard, and practicable detection method is arranged.Along with the more and more a large amount of application of color monitor, technical indicator, particularly resolution and the chromaticity index claimed of the color monitor made of each producer still finds no detection method simple and easy, handled easily at present.
The objective of the invention is to propose test picture library and the industrial computer that a kind of utilization designs voluntarily, directly absorb display comparison collection of illustrative plates to be measured by video camera and show situation, provide the method for resolution and chromaticity index by analyzing and processing.
Opened color video display function detecting system of the present invention, be primarily characterized in that it is by the test picture library 1 that can be used for test space resolution and chromaticity index, the industrial control computer 2 that contains image pick-up card, video-frequency signal converter 3, reception is by the display to be measured 4 of the vision signal of 3 outputs, absorb the image of display 4 to be measured and return the video camera 5 that computing machine 2 is handled, printing test result's printer 6.
A kind of method with color video display function detecting system detection display of the present invention is characterized in that adopting the following step:
(1) from test picture library 1, chooses suitable test pattern according to the parameter index (spatial resolution and chromaticity index) of display to be measured and be used for test;
(2) show the test pattern that is used to test with computing machine 2;
Vision signal when (3) computing machine 2 being shown test pattern is delivered to vision signal transition card (3);
(4) by video-frequency signal converter 3 vision signal is converted to the signal format that display to be measured adopts, and give display 4 to be measured with signal and be used for showing;
(5) by video camera 5 display content displayed to be measured is absorbed into;
(6) vision signal that transmits by video camera of computer acquisition;
(7) computing machine carries out data analysis and processing to the signal of gather, and wherein the calculating of spatial resolution is comprised binaryzation and to " 0 " " 1 " counting at interval of a row view data after the binaryzation; Calculating to chromaticity index comprises that utilizing standard regions that the RGB triple channel signal transformation of test section is arrived unifies to calculate the display error of test section then under the coordinate, and judges that according to display error whether display is by this test index; At last by printer or display output examining report.
Fig. 1 is the synoptic diagram that system constitutes.
Fig. 2 is a spatial resolution test pattern model.
Fig. 3 is a chromaticity index test pattern model.
Among the figure 1, the test picture library
2, the industrial control computer that contains image pick-up card
3, video-frequency signal converter
4, display to be measured
5, video camera
6, printer
The present invention is open, can be according to the parameters of display difference of test, designed, designed Expand the test picture library, change with display model and the display mode that adapts to development, have Very strong flexibility, extendibility.
One embodiment of the present of invention are as follows:
1) system forms: computing machine adopts Industrial Control Computer; Video-frequency signal converter adopts Trident 9750 (having computing machine concurrently shows and the TV-OUT function); Video camera adopts resolution to be higher than the video camera of display to be measured; Printer is a normal printer;
2) examination target: Changhong 19 " ordinary color tv set
3) spatial resolution test concrete steps:
(1) spatial resolution of colour TV is 256 lines (vertically), chooses test pattern shown in Figure 2 and be used for test (Fig. 2 is that 3 row black lines and triplex row white line alternately occur, and is that 1 row black line and delegation's white line alternately occur just when transforming into PAL) from test picture library 1;
(2) show the test pattern that is used to test with computing machine 2, display mode is 1024 * 768;
Vision signal when (3) computing machine 2 being shown test pattern is delivered to video-frequency signal converter 3;
(4) by video-frequency signal converter 3 vision signal is converted to the signal format that display to be measured adopts, and give colour television set with signal and be used for showing;
(5) adjust video camera guaranteeing the clear picture of function picked-up of making a video recording, and guarantee that the effective view data of vertical direction surpasses 256 row;
(6) vision signal that transmits by video camera of computer acquisition, the picture size of collection is 768 * 576;
(7) computing machine carries out data analysis and processing to gathering the signal of coming in, to gathering the effective coverage of the image of coming in, calculating is by deceiving to white frequency n 1=128 (from top to bottom), by white to the frequency n 2=128 (from bottom to up) that deceives, so n=n1+n2=256 reaches a conclusion: the resolution of this colour television set has reached 256 lines and has detected detailed report by printer or display output.3) chromaticity index test concrete steps:
(1) chooses test pattern shown in Figure 3 the picture library 1 from test and be used for test, black RGB (0,0,0) wherein, pure red RGB (255,0,0), pure green RGB (0,255,0), the standard of ethereal blue RGB (0,0,255) during as coordinate transform, four following width of cloth figure RGB (255,128,64), RGB (128,0,255), RGB (128,64,64), RGB (192,0,192) is used for test;
(2) show the test pattern that is used to test with computing machine 2;
Vision signal when (3) computing machine 2 being shown test pattern is delivered to video-frequency signal converter 3;
(4) by video-frequency signal converter 3 vision signal is converted to the signal format that display to be measured adopts, and give colour television set with signal and be used for showing;
(5) adjust the clear picture of video camera with the function picked-up of guaranteeing to make a video recording;
(6) vision signal that transmits by video camera of computer acquisition, the picture size of collection is 768 * 576;
(7) regulate brightness, the contrast of display, and the brightness of video camera, contrast makes the gray scale of gathering the standard drawing of coming in as far as possible near black to appropriate value, pure red,
Pure green, ethereal blue;
(8) gather the gray-scale value of standard drawing then, be recorded as black RGB (Rmin, Gmin, Bmin), pure red RGB (Rmax, 0,0), pure green RGB (0, Gmax, 0), ethereal blue RGB (0,0, Bmax);
(9) collecting test figure RGB (255,128,64), its gradation data be recorded as RGB (, Gdata, Bdata), and with its be transformed to RGB (R0, G0, B0), wherein
R0=255*(Rdata-Rmin)/(Rmax-Rmin),
G0=255*(Gdata-Gmin)/(Gmax-Gmin),
B0=255*(Bdata-Bmin)/(Bmax-Bmin),
Calculate square error E 0 = ( 255 - R 0 ) 2 + ( 128 - G 0 ) 2 + ( 64 - R 0 ) 2
(10) repeat (9), gather other test patterns, calculate the square error E1 of other figure, E2, E3 etc.;
(11) suppose that the maximum error that allows is Emax, detection Ei (i gets 0,1,2 ...) whether above Emax.If Ei is all less than Emax, then test is passed through, otherwise this display is not by test.

Claims (2)

1, a kind of opened color video display function detecting system, it is characterized in that it is by the test picture library 1 that can be used for test space resolution and chromaticity index, the industrial control computer 2 that contains image pick-up card, video-frequency signal converter 3, reception is by the display to be measured 4 of the vision signal of 3 outputs, absorb the image of display 4 to be measured and return the video camera 5 that computing machine 2 is handled, printing test result's printer 6.
2, a kind of method with color video display function detecting system detection display is characterized in that adopting the following step:
(1) from test picture library 1, chooses suitable test pattern according to the parameter index (spatial resolution and chromaticity index) of display to be measured and be used for test;
(2) show the test pattern that is used to test with computing machine 2;
Vision signal when (3) computing machine 2 being shown test pattern is delivered to vision signal transition card (3);
(4) by video-frequency signal converter 3 vision signal is converted to the signal format that display to be measured adopts, and give display 4 to be measured with signal and be used for showing;
(5) by video camera 5 display content displayed to be measured is absorbed into;
(6) vision signal that transmits by video camera of computer acquisition;
(7) computing machine carries out data analysis and processing to the signal of gather, and wherein the calculating of spatial resolution is comprised binaryzation and to " 0 " " 1 " counting at interval of a row view data after the binaryzation; Calculating to chromaticity index comprises that utilizing standard regions that the RGB triple channel signal transformation of test section is arrived unifies to calculate the display error of test section then under the coordinate, and judges that according to display error whether display is by this test index; At last by printer or display output examining report.
CN 00136287 2000-12-27 2000-12-27 Opened color video display function detecting system and method Expired - Fee Related CN1124587C (en)

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Application Number Priority Date Filing Date Title
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100405010C (en) * 2005-08-22 2008-07-23 中国科学院长春光学精密机械与物理研究所 Realtime deformation measuring device based on video image
CN101593479B (en) * 2009-03-27 2011-05-11 北京安达维尔科技有限公司 Method for testing avionic display
CN101685040B (en) * 2008-09-27 2011-07-27 奇景光电股份有限公司 Testing apparatus and testing method of display
CN102137273A (en) * 2011-03-28 2011-07-27 天津师范大学 Test pattern sequence and test method of three-dimensional colour gamut digital television
CN101635863B (en) * 2008-07-25 2012-03-21 深圳Tcl新技术有限公司 Method and system for testing visual effect of display equipment
CN101815222B (en) * 2009-02-25 2012-03-28 北大方正集团有限公司 Video color bar detecting method and device
CN103631246A (en) * 2012-08-20 2014-03-12 珠海格力电器股份有限公司 Test method, test device, test tool and test system of electronic device
CN108172151A (en) * 2017-12-15 2018-06-15 鲁霖 Color monitor resolution detection method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100405010C (en) * 2005-08-22 2008-07-23 中国科学院长春光学精密机械与物理研究所 Realtime deformation measuring device based on video image
CN101635863B (en) * 2008-07-25 2012-03-21 深圳Tcl新技术有限公司 Method and system for testing visual effect of display equipment
CN101685040B (en) * 2008-09-27 2011-07-27 奇景光电股份有限公司 Testing apparatus and testing method of display
CN101815222B (en) * 2009-02-25 2012-03-28 北大方正集团有限公司 Video color bar detecting method and device
CN101593479B (en) * 2009-03-27 2011-05-11 北京安达维尔科技有限公司 Method for testing avionic display
CN102137273A (en) * 2011-03-28 2011-07-27 天津师范大学 Test pattern sequence and test method of three-dimensional colour gamut digital television
CN103631246A (en) * 2012-08-20 2014-03-12 珠海格力电器股份有限公司 Test method, test device, test tool and test system of electronic device
CN108172151A (en) * 2017-12-15 2018-06-15 鲁霖 Color monitor resolution detection method

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