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WO2011061802A1 - Dispositif de traitement d'informations pour unités d'affichage - Google Patents

Dispositif de traitement d'informations pour unités d'affichage Download PDF

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Publication number
WO2011061802A1
WO2011061802A1 PCT/JP2009/006234 JP2009006234W WO2011061802A1 WO 2011061802 A1 WO2011061802 A1 WO 2011061802A1 JP 2009006234 W JP2009006234 W JP 2009006234W WO 2011061802 A1 WO2011061802 A1 WO 2011061802A1
Authority
WO
WIPO (PCT)
Prior art keywords
display unit
display
unit
information
image
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/JP2009/006234
Other languages
English (en)
Japanese (ja)
Inventor
三木洋平
宮原浩二
藤本仁志
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to PCT/JP2009/006234 priority Critical patent/WO2011061802A1/fr
Publication of WO2011061802A1 publication Critical patent/WO2011061802A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/0002—Inspection of images, e.g. flaw detection
    • G06T7/0004—Industrial image inspection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3179—Video signal processing therefor
    • H04N9/3185—Geometric adjustment, e.g. keystone or convergence
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3191—Testing thereof
    • H04N9/3194—Testing thereof including sensor feedback
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30108—Industrial image inspection
    • G06T2207/30121—CRT, LCD or plasma display

Definitions

  • the present invention relates to information on a display unit that detects the position of each display unit in a display device composed of a plurality of display units, measures the luminance of the display unit based on the detected position, and superimposes display unit information.
  • the present invention relates to an arithmetic device.
  • the brightness of each display unit needs to be uniform in order to display a high-quality image.
  • the luminance may not be uniform depending on the observation angle due to the characteristics of the LED elements used in the display unit.
  • a measurement technique for detecting the luminance for each display unit is required.
  • Patent Document 1 when measuring the luminance of each display unit region using the imaging unit, a position measurement pattern for determining the position of each display unit is displayed, and After that, it was necessary to display a luminance measurement pattern. In addition, the information on only the problematic part is output separately from the photographed image from the luminance calculation result, and it is difficult for the operator to grasp the intuitive situation.
  • the present invention has been made to solve such a problem, and it is not necessary to prepare a special display pattern for measuring the position, and the information calculation of the display unit can easily measure the position of the display unit.
  • An object is to provide an apparatus.
  • the information processing device of the display unit obtains a projective transformation matrix representing the relationship between the photographed image coordinate system and the display area coordinate system from the photographed image, and based on the projective transformation matrix, each display unit of the display device.
  • the position is calculated. Thereby, it is not necessary to prepare a special display pattern for measuring the position, and the position of the display unit can be easily measured.
  • FIG. 1 shows the relationship between a display device 1 and an imaging device 2 used in an information processing device of a display unit according to this embodiment.
  • FIG. 2 is a configuration diagram of the information processing apparatus of the display unit according to the present embodiment.
  • the display unit information computation device according to the present embodiment is realized by a computation device 100 to which a photographing device (photographing means) 2 for photographing the display device 1 is connected.
  • the arithmetic device 100 includes a video acquisition unit 101, a four corner detection unit 102, a projective transformation matrix calculation unit 103, a display unit position calculation unit 104, and a luminance calculation unit 105.
  • the arithmetic device 100 is realized by a computer, and the video acquisition unit 101 to the luminance calculation unit 105 are configured by software corresponding to each function and hardware such as a CPU and a memory that execute these software.
  • at least one of the functional units of the video acquisition unit 101 to the luminance calculation unit 105 may be configured with dedicated hardware.
  • the video acquisition unit 101 acquires an image obtained by photographing the display device 1 with the photographing device 2.
  • the four corner detection unit 102 detects the positions of the four corners of the display device image shown in the image held in the video acquisition unit 101.
  • the projective transformation matrix calculation unit 103 calculates a projective transformation matrix that represents the correspondence between the captured image coordinate system and the display area coordinate system necessary for specifying the display unit position on the captured image.
  • the display unit position calculation unit 104 obtains the display unit position on the image using the projection transformation matrix obtained by the projection transformation matrix calculation unit 103.
  • the four corner detection unit 102 to the display unit position calculation unit 104 constitute display unit position calculation means.
  • the luminance calculation unit 105 obtains the luminance of each display unit from the captured image based on the display unit position information on the captured image specified by the display unit position calculation unit 104.
  • step ST1 the entire display device 1 is turned on (step ST1), and photographing is performed in this state (step ST2). 4 is stored in the image acquisition unit 101.
  • step ST3 the four corner detection unit 102 detects the four corners of the display screen on the photographed image using the photographed image as shown in FIG.
  • the corner detection method uses a generally known corner detection method. At this time, if there is something other than the display screen that adversely affects corner detection in the captured image, the area for corner detection may be limited by manually setting a mask area.
  • step ST4 when the display device 1 is a device composed of display units of m rows and n columns, the upper left is (0, 0) and the lower right is shown in the display screen coordinates in FIG.
  • a projection transformation matrix used when converting the two-dimensional coordinates defined as (m, n) from the display area coordinates to the photographed image coordinates representing the pixel position of the photographed image is obtained (indicated by A in FIG. 6). Specifically, assuming that the captured image coordinate position is (C x , C y ) and the display screen coordinates are (S x , S y ), the projective transformation matrix is expressed as in Equation (1), From the nature, ⁇ can be eliminated.
  • each coefficient of the projective transformation matrix can be obtained using Equation (2).
  • step ST5 the display unit position calculation unit 104 uses the projection transformation matrix obtained in step ST4 to correspond to the vertex coordinates of each display unit in the display screen coordinates as shown in B in FIG. Find the coordinates on the captured image. That is, the boundary position of the display unit is obtained using the projective transformation matrix.
  • step ST6 the luminance calculation unit 105 calculates the luminance of each display unit using the individual display unit positions in the captured image coordinate system obtained in step ST5 as a clue. At this time, if there is something that affects the luminance measurement in the shooting environment, create a difference image after acquiring a shot image with the entire display screen turned off and use this image. To remove the effect.
  • the imaging unit that captures the display image of the display device that includes a plurality of display units, and the captured image coordinate system from the captured image of the imaging unit
  • a projection transformation matrix representing the relationship of the display area coordinate system is obtained, and based on the projection transformation matrix
  • the display unit position calculating means for calculating the respective positions of the plurality of display units in the display device, and the display unit calculating means Since it has a luminance calculation unit for calculating the luminance of each display unit based on the position of each display unit and the photographed image, the display pattern of the display device and its photographing intended to measure the luminance of the display unit Using only the image, it is possible to specify the position of the display unit on the captured image and measure the brightness of each unit. And providing a pattern, there is no need to obtain a new captured image.
  • the display unit position calculating means obtains a projective transformation matrix from the correspondence between the captured image and the four corner positions in the display image, and displays each display based on the projective transformation matrix. Since the boundary position of the unit is obtained, the position of the display unit can be easily obtained.
  • Embodiment 2 FIG.
  • the position of the display unit on the photographed image and the luminance measurement of each unit are performed using only the display pattern of the display device and the photographed image for the purpose of measuring the brightness of the display unit.
  • the information on the boundary between the display units obtained in the first embodiment and the brightness of each display unit is superimposed on the captured image.
  • FIG. 7 is a configuration diagram of the information processing apparatus of the display unit according to the second embodiment.
  • the configurations of the image acquisition unit 101 to the luminance calculation unit 105 in the display device 1, the imaging device 2, and the arithmetic device 100a are the same as those in the first embodiment shown in FIG. To do.
  • luminance difference information between adjacent display units is superimposed on the captured image from the boundary of the display unit obtained by the display unit position calculating unit 104 and the result obtained by the luminance calculating unit 105 in the arithmetic device 100a.
  • a superimposed image generation unit 106 is provided.
  • step ST7 based on the information obtained in steps ST5 and ST6, the superimposed image generation unit 106 creates a superimposed image. Specifically, as shown in FIG. 9, from the position information on the captured image of the display unit obtained in step ST5, a point is superimposed on the vertex position of the display unit, and a line is superimposed on the boundary position of the display unit. . In addition, when an address of the display unit is defined, numbers and characters may be superimposed so that the address can be easily understood by the viewer. Then, as shown in FIG.
  • the boundary is emphasized with a line having a different density in accordance with the magnitude of the luminance difference in the portion where the luminance difference between adjacent display units is large from the luminance information of the display unit obtained in step ST6.
  • the enhancement method may be enhancement based on the thickness of a line (a thick line when the luminance difference is large and a thin line when the luminance difference is small). In this way, by emphasizing the portion where the luminance difference between adjacent display units is large, the operator can easily understand where the problematic unit to be noticed is.
  • step ST8 the superimposed image 3 created in step ST7 is displayed.
  • a display method it may be displayed on a display by a personal computer (not shown) or printed on paper.
  • the luminance was measured, and a superimposed image was created for the result.
  • the display unit has different brightness / darkness tendencies depending on the RGB display elements, it is also possible to shoot with the RGB lighted individually, and to superimpose the individual RGB light / dark conditions from the respective images.
  • the superimposing image generation unit that superimposes the boundary position of each display unit and the luminance difference information of each display unit on the captured image is provided. Makes it easier to recognize the position of the display unit.
  • Embodiment 3 the information to be superimposed on the captured image relates to the luminance of the display unit.
  • the display unit position information on the photographed image obtained in the first embodiment is used, and the display unit information is used as information to be superimposed on the photographed image.
  • FIG. 12 is a configuration diagram of the information processing apparatus of the display unit according to the third embodiment.
  • the calculation apparatus 100b includes a display unit information superimposed image generation unit 107 in place of the luminance calculation unit 105 of the first embodiment.
  • the display unit information superimposed image generation unit 107 acquires display unit information from the display unit information storage device 4 that stores the display unit information, and generates an image in which the display unit information is superimposed.
  • Step ST1 to ST5 are the same as those in the first and second embodiments.
  • the display unit information is superimposed on the captured image in step ST9.
  • the display unit information includes, for example, a display unit manufacturing number and an operating time, and is information unique to each display unit.
  • step ST10 the created superimposed image 3a is displayed.
  • the display method may be to display on the display of a personal computer or to print on paper, as in step ST8 of the second embodiment.
  • FIG. 14 is an explanatory diagram when the serial number is displayed for each display unit.
  • the operator can easily visually recognize the display unit information such as the manufacturing number of each display unit in the display device. That is, in the case of an assembly-type large display device (a device that is assembled when used and disassembled after use) as the display device, the display unit to be used changes each time, so by displaying the manufacturing number for each display unit, The operator can easily confirm the display unit in which the display device is assembled. Further, in the case of such an assembly-type large display device, there are display units that are frequently used and display units that are not so, and there is a difference in operating time for each display unit.
  • the operator can easily check the operation time of each display unit. Furthermore, even for stationary large display devices, the display unit may need to be partially replaced over a long period of time. Even in such a case, maintenance of the display device can be performed by knowing the operating time of each display unit. Can be useful.
  • the operator may select whether or not to superimpose the display unit information as necessary. In this way, the operator can visually recognize the display unit information when necessary, and by selecting “no display”, the captured image itself can be easily confirmed.
  • the imaging unit that captures the display image of the display device including a plurality of display units, and the captured image coordinate system from the captured image of the imaging unit
  • a projection transformation matrix representing the relationship of the display area coordinate system is obtained, and based on the projection transformation matrix
  • the display unit position calculating means for calculating the respective positions of the plurality of display units in the display device, and the display unit calculating means Since the display unit information superimposed image generating unit for superimposing display unit information, which is information unique to each display unit, on the position of each display unit in the captured image based on the position of each display unit is displayed on the captured image Since the unit information is displayed corresponding to the position, the operator can easily grasp the entire display device.
  • the information processing device for a display unit relates to a configuration for detecting the position of each display unit in a display device composed of a plurality of display units, and is a display unit composed of a plurality of LEDs. Is suitable for detecting the position of the display unit of the LED large-screen display device configured by combining the two.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Geometry (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

Une unité de calcul de matrice de transformation par projection (103) détermine une matrice de transformation par projection indiquant la relation entre le système de coordonnées d'une image obtenue et le système de coordonnées d'une région d'affichage sur la base d'une image obtenue acquise par une unité d'acquisition vidéo (101). Une unité (104) de calcul de position d'unité d'affichage calcule les positions d'unités d'affichage respectives sur un dispositif d'affichage (1) sur la base de la matrice de transformation par projection. Une unité (105) de calcul de luminance calcule les luminances des unités d'affichage respectives sur la base des positions des unités d'affichage respectives et de l'image obtenue.
PCT/JP2009/006234 2009-11-19 2009-11-19 Dispositif de traitement d'informations pour unités d'affichage Ceased WO2011061802A1 (fr)

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Application Number Priority Date Filing Date Title
PCT/JP2009/006234 WO2011061802A1 (fr) 2009-11-19 2009-11-19 Dispositif de traitement d'informations pour unités d'affichage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2009/006234 WO2011061802A1 (fr) 2009-11-19 2009-11-19 Dispositif de traitement d'informations pour unités d'affichage

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WO2011061802A1 true WO2011061802A1 (fr) 2011-05-26

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06332439A (ja) * 1993-05-26 1994-12-02 Hitachi Ltd マルチ画面表示装置
JPH0764522A (ja) * 1993-08-30 1995-03-10 Hitachi Ltd マルチディスプレイ装置の自動調整システム
JPH07333760A (ja) * 1994-06-15 1995-12-22 Hitachi Ltd 自動調整システム
JP2003524915A (ja) * 1998-09-23 2003-08-19 ハネウェル・インコーポレーテッド タイル張り状ディスプレイをキャリブレーションするための方法および装置
JP2004219869A (ja) * 2003-01-17 2004-08-05 Toshiba Lighting & Technology Corp マルチディスプレイ用調整装置、マルチディスプレイシステムおよびマルチディスプレイ映像システム
JP2005266042A (ja) * 2004-03-17 2005-09-29 Seiko Epson Corp 画像の幾何補正方法及び補正装置
JP2008232837A (ja) * 2007-03-20 2008-10-02 Seiko Epson Corp 欠陥強調・欠陥検出の方法および装置、プログラム
WO2008149449A1 (fr) * 2007-06-07 2008-12-11 Telesystems Co., Ltd. Dispositif à multiples affichages
JP2009267966A (ja) * 2008-04-28 2009-11-12 Canon Inc 画像補正処理装置及びその制御方法、プログラム

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06332439A (ja) * 1993-05-26 1994-12-02 Hitachi Ltd マルチ画面表示装置
JPH0764522A (ja) * 1993-08-30 1995-03-10 Hitachi Ltd マルチディスプレイ装置の自動調整システム
JPH07333760A (ja) * 1994-06-15 1995-12-22 Hitachi Ltd 自動調整システム
JP2003524915A (ja) * 1998-09-23 2003-08-19 ハネウェル・インコーポレーテッド タイル張り状ディスプレイをキャリブレーションするための方法および装置
JP2004219869A (ja) * 2003-01-17 2004-08-05 Toshiba Lighting & Technology Corp マルチディスプレイ用調整装置、マルチディスプレイシステムおよびマルチディスプレイ映像システム
JP2005266042A (ja) * 2004-03-17 2005-09-29 Seiko Epson Corp 画像の幾何補正方法及び補正装置
JP2008232837A (ja) * 2007-03-20 2008-10-02 Seiko Epson Corp 欠陥強調・欠陥検出の方法および装置、プログラム
WO2008149449A1 (fr) * 2007-06-07 2008-12-11 Telesystems Co., Ltd. Dispositif à multiples affichages
JP2009267966A (ja) * 2008-04-28 2009-11-12 Canon Inc 画像補正処理装置及びその制御方法、プログラム

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