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WO2006049351A1 - Dispositif et methode de test pour processeur video - Google Patents

Dispositif et methode de test pour processeur video Download PDF

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Publication number
WO2006049351A1
WO2006049351A1 PCT/KR2004/002774 KR2004002774W WO2006049351A1 WO 2006049351 A1 WO2006049351 A1 WO 2006049351A1 KR 2004002774 W KR2004002774 W KR 2004002774W WO 2006049351 A1 WO2006049351 A1 WO 2006049351A1
Authority
WO
WIPO (PCT)
Prior art keywords
image
set forth
captured
image processor
test device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2004/002774
Other languages
English (en)
Inventor
Hyun Sung Gu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Priority to PCT/KR2004/002774 priority Critical patent/WO2006049351A1/fr
Publication of WO2006049351A1 publication Critical patent/WO2006049351A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers

Definitions

  • the present invention relates to an image processor, and, more particularly, to a test device for an image processor capable of capturing an image displayed by the image processor and determining a state of the image processor based on a processing result of the captured image, and a test method thereof.
  • an image processor serves to reproduce video and audio signals recorded in recording media such as a magnetic tape or a digital versatile disc (DVD) etc.
  • a combination system or "combo system”, which is also referred to simply as “combo”, has been implemented by integrating more than two different types of devices. For instance, a DVD player/video cassette recorder
  • DVDP/VCR combo is integrated to perform a DVDP function and a VCR function.
  • FIG. 1 is a schematic block diagram of the prior art image processor which includes a VCR unit 10 reproducing video and audio signals recorded in a magnetic tape and a DVDP unit 20 reproducing video and audio signals recorded in a DVD.
  • the prior art image processor may be connected to a TV 30 for outputting video and audio reproduced in the VCR unit 10 and DVDP unit 20. It may be also connected to an external device 40, such as a camcorder, in order to record video and audio signals therefrom and to reproduce them through an output device.
  • the prior art image processor can be controlled by an external manipulation device 50 such as a remote controller or buttons prepared on a manipulation panel (not shown) installed on an external case thereof, such that an operation mode switching between the VCR unit 10 and DVDP unit 20 and respective functions of the VCR unit 10 and DVDP unit 20 can be manipulated.
  • the operability of such an image processor must be verified before the processor may be sold to the public.
  • the prior art method for testing an image processor a magnetic tape or DVD is inserted into the image processor and then the reproduced images are displayed on a display, which is directly confirmed with the naked eye. Therefore, the prior art method for testing an image processor has disadvantages in that, since the image processor is tested based on an examiner's naked eye, the testing result is subjective and has a relatively low reliability.
  • the prior art method has a drawback in that a great deal of time is required to perform the test.
  • test device for an image processor capable of automatically and rapidly testing states of the image processor using a predetermined reference, and a test method thereof.
  • test device for an image processor capable of testing states of the image processor using a captured imaged of images reproduced in the image processor, and a test method thereof. Additional aspects and/or advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
  • a test device for a image processor comprising: a capture unit for capturing an image reproduced in the image processor; and an image comparator for comparing the captured image with a reference image and determining a state of the image processor based on the comparison.
  • the image comparator may include an image pattern comparator for comparing an image pattern of the captured image with an image pattern of the reference image and determining the state of the image processor.
  • the image comparator may include a character readout unit for recognizing characters included in the captured image, comparing the recognized characters with characters of the reference image and determining the state of the image processor.
  • the test device may comprises a memory unit for storing images identical to the images reproduced in the image processor.
  • the reference image corresponds to the captured image of the images stored in the memory unit.
  • the capture unit entirely or partially captures the images reproduced in the image processor.
  • the test device further comprises an error display unit for displaying the state of the image processor according to the determination result of the image comparator.
  • the test device further comprises a user interface unit including portions for inputting various input commands or a portion for displaying testing result.
  • the user interface unit may include an operation determination portion such that the test can select one of operations of the capture unit and a capture setting portion for setting a captured portion in an image.
  • the user interface unit may includes at least one of: an image loading portion for inputting a command for loading images stored in a memory unit thereon; a comparison command portion for inputting a command for comparing the loaded image with the captured image; a coordinate display portion for displaying coordinates of the compared images; and an error display portion for displaying an image consistent rate between the captured image and the loaded image, and error message if the image consistent rate does not comply with a reference value.
  • a test method of a image processor comprising: capturing an image reproduced in the image processor; and comparing the captured image with a reference image and determining a state of the image processor based on the comparison result.
  • the comparing may compare an image pattern of the captured image with that of the reference image.
  • the comparing may compare pixel information of the image pattern of the captured image with that of the image pattern of the reference image.
  • the comparing may compare characters of the captured image with those of the reference image.
  • the state is determined according to an image consistent rate between the captured image and the reference image.
  • the present invention can automatically test images reproduced in an image processor with a predetermined reference, reliability of test results is relatively high and testing can be performed at a relatively high speed. Therefore, productivity for image processors can be enhanced.
  • testing speed is faster than the case wherein the entire image is compared with the reference image.
  • the present invention has advantages in that it is easy to test image processors using a user interface, such that necessary commands for capturing images and comparing the capture image with the reference image are easily performed through portions prepared on the user interface by an examiner.
  • FIG. 1 is a schematic block diagram of the prior art image processor
  • FIG. 2 is a view illustrating a production line for an image processor to which the present invention is applied;
  • FIG. 3 is a view illustrating a system for testing quality of moving images displayed on a screen, wherein the system is aligned in the production line of FIG. 2;
  • FIG. 4 is a view illustrating a test device for an image processor according to one embodiment of the present invention
  • FIG. 5 is a view illustrating a user interface of a capture unit included in the test device for a image processor of FIG. 4;
  • FIG. 6 is a view illustrating a character recognition screen of a captured image in the test device for an image processor according to one embodiment of the present invention
  • FIG. 7 is a view illustrating a character recognition settings screen for recognizing characters included in a captured image in the test device for an image processor according to one embodiment of the present invention
  • FIG. 8 is a view illustrating a reference image stored in a memory unit of the test device for an image processor according to one embodiment of the present invention
  • FIG. 9 is a view illustrating an image captured in a capture unit of the test device for an image processor according to the present invention
  • FIG. 10 is a view illustrating a user interface of a comparator and error display unit of the test device for a image processor according to one embodiment of the present invention.
  • FIG. 11 is a flowchart for describing a test method for an image processor according to one embodiment of the present invention.
  • FIG. 2 is a view illustrating a production line for an image processor to which the present invention is applied. More specifically, it shows a production line for an image processor capable of reproducing moving images through a VCR and DVD player.
  • the production line 100 is roughly classified into four processes, which are an assembly process 105, a completion process 110, a testing process 115 and a shipment process 120. Also, work guideline providing devices 160, 162, and 164 for providing work guideline indicative of working contents of workers in each process, testing systems 152, 154, and 156 for performing image screen test, monitoring terminals 172 and 174 for monitoring information for each process, and a server 150 for managing various information related to the production line 100 are connected to each other via an exclusive line for test denoted by a solid line. Here, since the server 150 is also connected to an external network, a remote user can access information for the production line 100 through a terminal 170. Also, a test condition editor 158 for recording or updating test conditions for an image screen test is connected to the external network. The test condition editor 158 may be located on the exclusive line for test.
  • the assembly process 105 serves to assemble parts included in a VCR or DVD player into a finished product. After assembling, a forklift 180 carries the assembled product to a location for performing completion process 110.
  • the completion process 110 serves to fabricate an image processor using the assembled product and supplies power to the image processor for operations. Also, an image recording medium such as a video tape, a DVD or a video CD is loaded on the image processor for image screen test. Here, the image recording medium should guarantee integrity.
  • the testing process 115 serves to test whether an image processor can normally extract data from an image recording medium and provide an image screen on a screen, which is characterized by the present invention.
  • the shipment process 120 serves to pack the image processor without defect, i.e., passing through the testing process 1 15, and then attach a box label.
  • a defective image processor, detected in the testing process 115 is deposited at a specific place.
  • information relating to the four respective processes 105, 110, 115 and 120 is shared with each other via the exclusive line for test, denoted by a solid line, and may be stored in the server 150.
  • FIG. 3 is a view illustrating a system for testing quality of moving images displayed on a screen, wherein the system is aligned in the production line of FIG. 2.
  • the testing system includes a transporting device 200 such as a conveyor belt, a image processor 210 including an output unit 215 for outputting audio/video signals, a control device 220 for operating the image processor 210, a signal distributor 230 including an interface unit 235 for inputting audio/video signals from the output unit 215, a test device 240 for inputting image data from the signal distributor 230, analyzing the image data and performing an image quality test based on the analysis, and a display device 250. Operations of the testing system of FIG. 3 are described in detail below.
  • the control deice 220 When the image processor 210 is transported by a transporting device 200, the control deice 220 operates the image processor 210 for an image quality test.
  • the control device 220 is implemented with a wireless remote controller.
  • the test device 240 for a image processor is controlled as an examiner directly manipulates the wireless remote controller or is automatically controlled as an examiner manipulates the wireless remote controller connected to the test device 240 to which test items are previously set.
  • the testing items may be stored in the server 150 of FIG. 2 and then transmitted to the systems 152, 154 and 156.
  • the output unit 215 When the image processor 210 is operated, image data previously loaded on an image storage medium in a previous process is readout from the image storage medium and then the output unit 215 outputs audio and video signals based on the outputted image data.
  • the outputted signals are collected at the signal distributor 230 through the interface unit 235. Even if the signal distributor 230 is not illustrated in detail in FIG. 3, it includes over two interface units 235 to collect audio and video signals from a number of image processors at a time.
  • the signal distributor 230 transmits collected data corresponding to the audio and video signals to the test device 240 for an image processor.
  • the communication manner between the signal distributor 230 and the test device 240 is implemented with parallel interface or high-speed serial interface such as IEEEl 394.
  • the test device 240 analyzes collected moving image data of the collected data and determines whether the image processor 210 normally reads image data based on the analysis. Also, the test device 240 provides a currently reproduced image screen and a test result of image screen to a display device 250 such as s monitor. If the test device 240 is checking more than two image processors, the display device 250 can simultaneously display test results through divided screens on a monitor.
  • the test device 240 for an image processor may include the signal distributor 230 or the display device 250.
  • FIG. 4 is a view illustrating a test device for a image processor according to one embodiment of the present invention, which includes a capture unit 241 for capturing an image outputted form the image processor to be tested, an image comparator 242 for comparing the captured image from the capture unit 241 with a reference image and determining a state of the image processor, and an error display unit 248 for displaying a state whether there is an error based on the determination result of the comparator 242.
  • the image processor plays a magnetic tape or a DVD to display images thereof. Also, the image processor extracts and displays images from a memory when inputting commands formed by specific key combinations using buttons prepared on a manipulation panel installed on the image processor or an external manipulation device such as a remote controller etc.
  • the capture unit 241 provides a user interface so as to entirely or partially capture images outputted from the image processor. As shown in FIG. 5, the user interface includes an operation decision portion 310 for selecting activation/inactivation of the capture unit 241, a capture setting portion 320 for setting a capturing area in an image outputted from an image processor to be tested by an examiner, and a terminating portion 330 for disabling the user interface.
  • a start button in the operation decision portion 310 serves to reproduce images and a stop button serves to stop reproducing the images.
  • the capture setting portion 320 serves to capture a desired area in an image stopped by the stop button and to store the captured image in a memory.
  • the capture setting portion 320 includes a Learn Template recognizing a captured area in various manners, for example, drag and drop using a mouse, a Global Template recognizing a default captured area, and a File Save storing a captured area.
  • the image comparator 242 includes a memory 243 storing images identical to those reproduced in the image processor, a coordinate storing unit 247 for storing coordinate information of images stored in the memory 243, and a comparator 244 for extracting images from the memory 243 so as to correspond coordinate of captured image transmitted from the capture unit 241 (i.e., for extracting an identical area of a frame identical to captured image of images stored in the memory), comparing the extracted images with the transmitted images from the capture unit
  • the comparator 244 includes a character readout unit 245 for recognizing characters included in the image captured by the capture unit 241 and determining the image processor based on the recognizing result, and an image pattern comparator 246 for recognizing an image pattern of the captured image and determining the image processor based on the recognizing result.
  • the character readout unit 245 recognizes characters such that it compares size of characters included in the captured image with that of characters included in a reference image or extracts Euclidean distances between a vector extracted from a pattern of characters include in the captured image and reference vectors extracted from patterns of target characters stored in the reference image. Also, when calculating Euclidean distance between a vector of an input pattern and a reference vector, the character readout unit 245 compares the calculated Euclidean distance with a predetermined threshold value and recognizes characters based on the comparison.
  • the character readout unit 245 can also recognize characters included in the image pattern itself (for example, characters in signboards in an image taking street scenery) as well as characters overlaid on an image pattern.
  • the character readout unit 245 recognizes characters (overlaid character C3) included in a predetermined area 610 in an image captured by the capture unit 241 and compares size of C3 with that of characters included in a reference image stored in the memory unit 243. Also, the character readout unit 245 can set a character type 710 and characters 720 to be compared in the area 610 through a user interface as shown in FIG. 7.
  • the image pattern comparator 246 compares pixels of an image pattern of an captured image with that of an image pattern of a reference image stored in the memory unit 243 (for example, compares levels of R, G, B to determine colors of each pixel) to calculate error generation rate to inconsistent portions between image patterns based on the comparison, and determines that there is an error in the image pattern of the captured image if the error generation rate is greater than the reference value. Namely, the image pattern comparator 246 compares any portion 810 of an image pattern of an image stored in the memory unit 243 as shown in FIG 8 with any portion 820 of an image pattern of the image captured by the capture unit 241 as shown in FIG.
  • the error display unit 248 displays an error message on a display if there is an error in an image captured by the capture unit 241. Therefore, an examiner can recognize a comparison result performed by the comparator 244 and further control operations of the comparator 244 and the error display 248 through the user interface.
  • the user interface as show in FIG.
  • an image loading portion 910 for loading a reference image stored in a memory unit
  • a comparison command portion 920 for comparing an image loaded by the image loading portion 910 with an image captured by the capture unit 300
  • a coordinate display portion 930 for displaying coordinates of images compared to each other
  • an error display portion 940 for displaying an image consistent rate of the image comparator 242 as a comparison result and an error message if the consistent rate does not comply with a reference value.
  • FIG. 11 is a flowchart for describing a test method for an image processor according to one embodiment of the present invention. Firstly, testing conditions are set by an examiner, in step Sl, such that reference values for a capture area or error generation rate (or an image consistent rate) are set if the method for testing a image processor is performed through an image pattern matching and a capture area and a check character, etc., if the testing is performed through character recognition.
  • step Sl such that reference values for a capture area or error generation rate (or an image consistent rate) are set if the method for testing a image processor is performed through an image pattern matching and a capture area and a check character, etc., if the testing is performed through character recognition.
  • the image processor displays images stored in a magnetic tape or a DVD, etc. or displays images previously stored in a memory through a specific key combination.
  • the capture unit 241 captures a predetermined area in the displayed image in step S3.
  • the captured image is transmitted to the image comparator 242 in step S4. After that, an image corresponding to the captured image is extracted from the memory unit 410 in step S5.
  • the extracted image is compared with the captured image for analysis in the comparator 244 in step S6.
  • the character readout 245 performs comparison based on recognition of characters included in the captured image and analyzes the comparison result.
  • the image pattern comparator 246 compares image patterns between the captured image and the extracted image and analyzes the comparison.
  • step S6 Based on the analysis result of step S6, an error generation rate for non- consistent portions between the extracted image and the extracted image is calculated in step S7. After that, the calculated error generation rate is compared with a reference value in step S8.
  • step S 8 If the comparison result of step S 8 does not comply with the reference value (i.e., if the calculated error generation rate is greater than the reference value), the testing result such as the error generation rate and error generation positions etc., are displayed through the error generation unit 500 in step S9.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)

Abstract

Cette invention concerne un dispositif et une méthode de test pour processeur d'images. Le dispositif d'essai capture une image reproduite par un processeur d'images, compare ladite image à une image de référence et détermine un état du processeur d'images en fonction du résultat de la comparaison. La présente invention permet de tester automatiquement des processeurs d'images au moyen d'une référence prédéterminée, ce qui accroît la fiabilité du test et en accélère l'exécution.
PCT/KR2004/002774 2004-11-01 2004-11-01 Dispositif et methode de test pour processeur video Ceased WO2006049351A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2004/002774 WO2006049351A1 (fr) 2004-11-01 2004-11-01 Dispositif et methode de test pour processeur video

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2004/002774 WO2006049351A1 (fr) 2004-11-01 2004-11-01 Dispositif et methode de test pour processeur video

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WO2006049351A1 true WO2006049351A1 (fr) 2006-05-11

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2159781A1 (fr) * 2008-08-28 2010-03-03 Continental Automotive GmbH Procédé et dispositif pour reconnaître au moins un symbole affiché en tant que matrice de points
CN105279072A (zh) * 2015-10-26 2016-01-27 广东威创视讯科技股份有限公司 一种电子产品开机掉电测试方法、装置及系统

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4855813A (en) * 1987-12-11 1989-08-08 Russell David P Television image processing system having capture, merge and display capability
KR20000008597A (ko) * 1998-07-14 2000-02-07 윤종용 텔레비젼 선명도 검사장치

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4855813A (en) * 1987-12-11 1989-08-08 Russell David P Television image processing system having capture, merge and display capability
KR20000008597A (ko) * 1998-07-14 2000-02-07 윤종용 텔레비젼 선명도 검사장치

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2159781A1 (fr) * 2008-08-28 2010-03-03 Continental Automotive GmbH Procédé et dispositif pour reconnaître au moins un symbole affiché en tant que matrice de points
CN105279072A (zh) * 2015-10-26 2016-01-27 广东威创视讯科技股份有限公司 一种电子产品开机掉电测试方法、装置及系统

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