CN101076128A - Method and apparatus for correcting multi-screen connected wall - Google Patents
Method and apparatus for correcting multi-screen connected wall Download PDFInfo
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- CN101076128A CN101076128A CNA2007100284376A CN200710028437A CN101076128A CN 101076128 A CN101076128 A CN 101076128A CN A2007100284376 A CNA2007100284376 A CN A2007100284376A CN 200710028437 A CN200710028437 A CN 200710028437A CN 101076128 A CN101076128 A CN 101076128A
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- 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
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
- G06F3/1446—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display display composed of modules, e.g. video walls
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- 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]
- H04N9/3141—Constructional details thereof
- H04N9/3147—Multi-projection systems
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0242—Compensation of deficiencies in the appearance of colours
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0285—Improving the quality of display appearance using tables for spatial correction of display data
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
- G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
- G09G2360/147—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen the originated light output being determined for each pixel
Abstract
The apparatus comprises a correction unit composed of a video camera module for capturing the color information of the screen, an image data buffer module, and a main control module used for receiving and executing the computer command. Said video camera module and image data buffer module are respectively connected to the multi-screen display wall and computer via the main control module. The method comprises: appointing the image displayed by each display unit on the multi-screen display wall; said video camera module shoots at least one picture and saves it in the image data buffer module; the computer extracts the color information from each display unit; according to the color of each display unit, the computer corrects the difference between said display units.
Description
Technical field
The present invention relates to a kind of means for correcting and method of display device, particularly relates to a kind of apparatus for correcting multi-screen connected wall and method.
Background technology
Development along with computer information technology, China Telecom, electric power, water conservancy, public security, urban transportation, road transport and industrial processes monitoring field are to multi-screen display and technology requirement rapid growth, the multi-screen numeral is pieced together wall system and all kinds of Computer signals, vision signal can be shown on multi-screen splicing wall, form the information display management control system of a cover perfect in shape and function, advanced technology, for the user provides an interactively man-machine interface, real-time, many pictures that can satisfy Dispatch and Command Center fully show needs.But become each system integrator's a great problem for the color of multi-screen connected wall system, the consistency correction of brightness.
Major part still adopts the method that manpower is adjusted at present, guarantees that by selecting movement and bulb brightness is unanimous on the whole before dispatching from the factory, and does meticulous adjustment again by manual operation then, and correction work must the professional just can be finished, and need the plenty of time, and effect is bad; And another part way is to utilize the optical parametric of each display units of measurement such as color analysis instrument of color sensor or specialty, analyze and make correction then, owing on same display unit, measure limited point, complicated operation, and because of the screen intensity inhomogeneities, cause in same display unit that test result differs greatly the effect correction effect on the each point.Also some way is to adopt the color analysis instrument of specialty to get the multimetering data at screen, and cooperates software to adjust the consistency of color, brightness, has the big problem of measurement result difference equally, and it is undesirable to adjust effect.
As disclosing a kind of color correcting method of multi-channel projection display system in the CN1658651A patent documentation, it adopt each projected channel respectively with the red, green, blue color from 0-255 projection 256 times, gather and set up mapping (enum) data respectively, calculate the public common factor of color then, repeatedly single modification correction coefficient is revised input picture on this basis, be input to projector then and measure color data, up to proofreading and correct back mapping (enum) data and object color component mapping (enum) data difference less than error range.The process complexity, its data volume is very big, and the times of collection that single display unit is set up mapping (enum) data is 3*256=768 time, and trimming process may also need repeatedly repetitive process, along with number of active lanes increases, proofreading and correct corresponding one-tenth multiple consuming time increases.And system needs the cooperation of color measurements equipment to finish calibration function, use the color measurements equipment price costliness of specialty, complicated operation, and the versatility of each producer is bad, and some other universal picture pick-up devices all are original image to be carried out color handle, and it is bigger to be applied in the colour correction error.
Summary of the invention
The purpose of this invention is to provide a kind of simple in structure, easy to use, multi-screen connected wall color that cost is low, simple to operate, the apparatus and method of gamma correction, and material, display mode to display unit do not have specific requirement, only need display unit to have and can offer color, the luminance parameter that the user adjusts.
To achieve these goals, the present invention adopts following technical scheme:
A kind of means for correcting of multi-screen connected wall, it comprises by the photographing module that extracts screen color information, view data cache module, the master control module of reception and object computer order, and computer.
Photographing module comprises the optical lens and the photo-sensitive cell of the optical filter, fixed focal length or the adjustable focus that are used to gather screen color information; The view data cache module is finished the reading of photographing module, and can select compression or packed data, all images or parts of images do not read; Picture, gain and the time for exposure of adjusting photographing module that the master control module finishes the transmission of piecing together the wall view data between the synchronization signal detection of piecing together the wall display unit and the computer, receive instruction that data and process computer send, the control multi-screen connected wall shows appointment, adjust the color parameter of each display unit; Display unit can adopt LCD (LiquidCrystal Display LCD), DLP (processing of Digital Light Processing digital light), LCOS (Liquid Crystal on Silicon liquid crystal over silicon) or other Display Techniques, as long as each cell colors parameter has adjustable characteristic, as RGB or CMY, brightness, contrast etc.
Means for correcting and multi-screen connected wall and computer communicate to connect the wired or wireless mode that adopts, such as RS232, USB, infrared, bluetooth etc., but be not limited to the above mode that communicates to connect.Means for correcting should be placed on the scope of all display units that can photograph multi-screen connected wall and be advisable; Perhaps piece together in the wall application at jumbotron, the method of taking subregion to proofread and correct, can change the means for correcting position as required and take a plurality of correction subregions, perhaps adopt a plurality of photographing modules that each subregion is taken separately, two adjacent shooting areas should an overlapping at least delegation display unit or a row display unit.
Computer is finished color analysis and calibration function, for treatment of picture mainly is requirement to internal memory, according to the needs of using, the internal memory of the master control chip in can the spread corrections device can be finished the color analysis and the correction of display unit in means for correcting; Perhaps on means for correcting, build embedded platform, operation embedded OS LINUX, WIN CE etc., operation color analysis and correction software under system strengthen portable.
The RGB primary colours consistency of adjusting display unit is adjusted the brightness of display unit and contrast level parameter is pieced together the brightness of the whole screen of wall with assurance consistency to guarantee to piece together the wall color consistency.Each step is whole may to be needed repeatedly to adjust repeatedly.
It is higher at first to calculate primary colours parameter of consistency scope and brightness that whole assembly wall can reach: computer sends order the RGB primary color values (n that pieces together each display unit of wall is set to means for correcting, Rs, Gs, Bs), and be set and be maximum, computer sends each display unit of order control assembly wall and shows appointment primary colours pure color or classification color range picture respectively, as red, green, indigo plant is taken and is pieced together the wall screen shots and pass computer back, and the color show state is respectively shielded in analysis, draw in demonstration red, green, following colour brightness Rr that can reach of blue monochromatic situation, Gr, Br, and comprehensively draw actual value (n, the Rr of the RGB primary colours of each screen, Gr, Br), the maximum of RGB primary colours setting and mapping relations (n, the Rr of actual value are respectively shielded in foundation, Gr, Br)=R (n, Rs, Gs, Bs), its inverse process actual value is (n, Rs, Gs to the mapping relations of set point, Bs)=S (n, Rr, Gr, Br).Calculate the highest color value MAX_RGB that all screens can both reach, as MAX_RGB=(246,250,240), consider the territory degree that leaves adjustment, setting the RGB primary colours of piecing together all display units of wall is the maximum of setting for 90% value of being shone upon with MAX_RGB: (n MAX_RGB*90%), guarantees that the consistency of all display units has adjustability to S.Means for correcting can display unit that can't adjust be made prompting requirement replacing to color distortion is big.
Piece together the bearing calibration of wall base look consistency: selected arbitrarily benchmark display unit, generally be as the criterion with center display unit, progressively adjust the consistency of primary colours to periphery, and the display unit of periphery is that benchmark adjusts with adjusted adjacent display cell again, all can take at least one pictures before each the adjustment, isolate the picture of each display unit, from each picture, extract many group color data, as the color measured values of this display unit, adjust foundation as next step.
Particularly may further comprise the steps:
The selected reference display unit
Take the photo of a plurality of or whole display units at least one the current correcting area that comprises the benchmark display unit;
The display unit of correction reference display unit or the display unit periphery proofreaied and correct one by one;
Repeat above step 2 to 3, up to the correction of finishing all display units.
Above step can further include, and before the adjustment, calculates the colour consistency parameter area that whole assembly wall can reach.
The described benchmark display unit of above step 1 can be arbitrary display unit on the combination, but is good to piece together the wall center display unit.
Above-described step 3 specifically may further comprise the steps:
The each correction of a all can be taken at least one pictures before, isolates the picture of each display unit, extracts one or more groups color data from each picture, as the color measured values of this display unit;
The color measured values of b comparison standard display unit display unit peripheral with it, proofread and correct the color parameter of its peripheral display unit repeatedly, until the difference of the color measured values of the color measured values of the display unit of standard display unit periphery and standard display unit less than specification error.
Above step is described to be extracted many group color data and respectively gets one group of color data for arbitrary end, two ends, three ends or four ends in the upper end of each picture, left end, lower end, the right-hand member from each picture, timing carries out the comparison of two groups of adjacent color data.
Color correction is proofreaied and correct three primary color channels at least.Setting screen shows red, green, blue pure color or classification color range picture respectively, independent regulation R, G, B passage, reach R, G, B primary colours consistency, setting screen shows one or more secondary colours then, finely tune color parameter again, reach each display unit secondary colour unanimity when secondary colour, and will take into account consistency of colour under the red, green, blue pure color.The single passage color adjustment method of single display unit: the color value that actual measurement is obtained and the increment of desired value difference, adjust repeatedly, be less than or equal to the threshold value of an expection up to the difference of actual measurement color-values and desired value.The mode of progressively adjusting to periphery according to being as the criterion with the center is finished the adjustment of whole screen successively.The RGB primary colours consistency of adjacent display cell does not also require that the color of its RGB is equal fully, and allows that certain numerical value difference that human eye vision allowed is arranged between them, can adjust the RGB parameter of the display unit of having adjusted at any time according to the applied environment needs.Extract and to take multiple pictures in the monochromatic process as required and on same pixel, average then.For reducing the error that causes of shooting angle and ambient light interference, the color range of getting of single display screen has more than and gets one group, but get up and down boundary totally four groups of data, and the manner of comparison of adjacent display cell is to make comparisons with two groups of adjacent measurement data in up and down.
Timing, distance and viewing angle difference according to the observation, display unit color saturation and screen intensity viewing angle is big according to different brightness curves suitably improve, to obtain best observing effect.
Piece together in the wall application at jumbotron, the method of taking subregion to proofread and correct, can change the means for correcting position as required and take a plurality of correction subregions, perhaps adopt a plurality of photographing modules that each subregion is taken separately, two adjacent shooting areas should an overlapping at least delegation display unit or a row display unit.
Proofread and correct the RGB primary colours consistency of each display unit, guaranteed the consistency of whole assembly wall color.
Brightness is adjusted: set each display unit of combination and show respectively and have laterally or the picture of classification GTG vertically or at any angle, as 16,32,64 grades of GTGs etc.According to proofreading and correct the conforming method of screen color, selected benchmark display unit is to the periphery adjustment, and adjacent display cell is done benchmark with adjusted display unit equally.Laterally contrast the adjustment adjacent display cell with horizontal GTG picture, vertically contrast the adjustment adjacent display cell with vertical GTG picture.
Multi-screen connected wall can adopt rear-projection or preceding throwing mode, and preceding throwing mode is subjected to the restriction of ambient light effects and size, uses less.During adjustment, distance and viewing angle difference according to the observation, display unit color saturation and screen intensity viewing angle is big according to different brightness curves suitably improve, to obtain best observing effect.
Compared with prior art, the present invention has following beneficial effect:
This multi-screen connected wall color correction device is simple in structure, cost is low, anti-ambient light interference is strong, and calibration result is good.Adopt single shot, the mode that multichannel is proofreaied and correct simultaneously, speed is fast.The full-automatic adjustment reduced the manual operation error.Display unit is not had specific (special) requirements, only need possess adjustable color parameter interface.The screen size that needs are proofreaied and correct is unrestricted, and bigger assembly wall is used and can be adopted the mode of subregion to proofread and correct.
The invention will be further described below in conjunction with the drawings and the specific embodiments.
Description of drawings
Fig. 1 is the structural representation that the embodiment of the invention is pieced together wall means for correcting and rear-projection unit;
Fig. 2 is single rear-projection display unit cut-away view;
Fig. 3 is embodiment of the invention m * n multi-screen connected wall schematic diagram;
Fig. 4 is the whole screen of embodiment of the invention m * n multi-screen connected wall correction principle figure;
Fig. 5 is embodiment of the invention m * n multi-screen connected wall subregion correction principle figure;
Fig. 6-Fig. 9 is that the real m of the present invention * n multi-screen connected wall subregion is proofreaied and correct decomposition principle
Figure 10 is that the embodiment of the invention is pieced together wall means for correcting photographing module visual angle error curve diagram;
Figure 11 is embodiment of the invention m * n multi-screen connected wall display unit colour brightness curve chart;
Figure 12 is that embodiment of the invention assembly wall means for correcting is finally taken the colour brightness curve chart;
Figure 13 is that the embodiment of the invention is pieced together the horizontal classification GTG of wall means for correcting display unit picture;
Figure 14 is that the embodiment of the invention is pieced together the vertical classification GTG of wall means for correcting display unit picture;
Figure 15 is that the embodiment of the invention is pieced together the horizontal and vertical staged GTG picture of wall means for correcting display unit;
Figure 16 is that the embodiment of the invention is pieced together wall means for correcting display unit brightness and contrast method of adjustment schematic diagram.
Embodiment
As Fig. 1, the 101st, the display screen of multi-screen connected wall; The 102nd, form the single rear-projection display unit of piecing together wall, can be DLP projector, CRT or LCD etc.; The 103rd, the controller of corresponding display unit; The 104th, means for correcting, place the place ahead of multi-screen connected wall can photograph in the scope of desired zone, such as for small-size screen such as Fig. 3, can be placed on the position range that can photograph all viewing areas 301, assembly wall such as Fig. 4 for jumbotron answer subregion to proofread and correct, and means for correcting is placed on the position range that can photograph each subregion separately; The 105th, the master control module can adopt wired or wireless mode to be connected with computer with the assembly wall; The 106th, photographing module; The 107th, but the optical lens of automatic focusing and photo-sensitive cell; The 108th, data cache module, the 109th, be used to move the computer of color correction software.
Fig. 2 is single rear-projection display unit cut-away view, the 201st, and observer's view directions, the 202nd, the screen of display unit, the 203rd, beam direction, the 204th, speculum, the 205th, optical projection machine and controller, the 206th, casing.
Proofread and correct and mainly be divided into two big steps: at first proofread and correct the consistency of screen color, proofread and correct the consistency of screen intensity then.
Embodiment 1:
M * n (m: form the multi-screen connected wall line number, n: the columns of forming multi-screen connected wall) multi-screen connected wall color calibration method schematic diagram such as Fig. 4, place screen the place ahead can photograph the position of whole viewing area 401 means for correcting, the control display screen curtain shows the picture of designated color, the photographed screen photo, the display unit colouring information is proposed from picture, with center display unit 402 is benchmark, adjust synchronously to four direction 403,404,405,406, in each zonule, adjust afterwards, as 407,408,409,410 etc. along from inside to outside mode.Unadjusted display unit is that benchmark is done progressively adjustment with the display unit of having had suffered, can suitably adjust trained display unit as required.
Computer sends order to means for correcting, control is pieced together wall and is shown pure red color, take at least one pictures, and be returned to computer, according to surround lighting with to piece together the bright dark degree of the color that wall shows different, suitably adjust the color gain and the time for exposure of photographing module, make captured photo can be whole partially secretly, and can the color saturated phenomenon not occur at the photo zone line, and it is even finally to reach the colour brightness of each display unit of photo of shooting.
Picture shot is resolved into the picture of independent displaying unit, analyze the color of each display unit, draw up and down totally four groups of color parameters, adjacent display cell compares with adjacent parameter relatively the time.
Draw adjustment numerical value, may need to adjust repeatedly several times and just can reach consistent, as among Fig. 4 with 402 be benchmark along 403,404, directions such as 405,406,407,408,409 are progressively adjusted to periphery.
To piece together uses the same method after the wall redness has been adjusted adjusts green, blue, adjusts white then, and white is the RGB secondary colour, should take into account the consistency of pure color during adjustment.
Piece together wall brightness adjustment, set the picture that each display unit of combination shows the picture that has horizontal classification GTG respectively and/or has vertical classification GTG, as Figure 13 and Figure 14 or Figure 15.Take and piece together the wall picture, analyze and contrast the luminance level of adjacent display cell, in Figure 16,1601,1602,1603 is the color level figure that benchmark screen n takes, 1601,1602,1603 be respectively red, green, blue brightness curve, 1604,1605,1606 for taking the red, green, blue brightness curve of the display unit n+1 that needs correction, can judge that from figure the red contrast of display unit to be corrected is on the low side, green brightness is higher, and blue brightness is on the low side, is used as next step with this and adjusts display unit n+1 screen intensity scheme.With 402 display units among Fig. 4 is benchmark, progressively adjusts each display unit to periphery, and finally reaches the brightness unanimity of whole screen.
Embodiment 2:
Subregion is proofreaied and correct multi-screen connected wall color approach schematic diagram such as Fig. 5 of m * n, with screen be divided into four 501,502,503,504 or more correcting areas, an all overlapping delegation of per two adjacent correcting areas or a row display unit.Divide four regional correction methods as follows:
Proofread and correct the first area: 601 is first correcting area in Fig. 6,602 is the benchmark display unit, row along 602 places is progressively proofreaied and correct left, row along 602 places are upwards proofreaied and correct, with the display unit proofreaied and correct as new benchmark, progressively proofread and correct its adjacent display cell, and correction of a final proof 601 whole viewing areas.
Second area is proofreaied and correct: 701 is second correcting area in Fig. 7, and the display unit of 702 columns be 701 with Fig. 6 in the overlapping region of 601 correcting areas, the display unit of these row has reached unanimity in the correction of first area, in second area is proofreaied and correct, should with the display unit of 702 columns benchmark, progressively proofread and correct each display unit to the right, and should take into account the consistency of display unit up and down, finally reach and proofread and correct 701 whole viewing areas.
The 3rd regional correction: 801 is the 3rd correcting area in Fig. 8, and 802 display units of being expert at be 801 with Fig. 7 in the overlapping region of 701 correcting areas, the display unit of this row has reached unanimity in the correction of second area, in the 3rd regional correction, should be benchmark with 802 display units of being expert at, progressively proofread and correct each display unit downwards, and should take into account the consistency of left and right sides display unit, finally reach and proofread and correct 801 whole viewing areas.
The 4th regional correction: 901 is the 4th correcting area in Fig. 9, and the display unit of 902 columns be 901 with Fig. 8 in the overlapping region of 801 correcting areas, the display unit of this row has reached unanimity in the correction in the 3rd zone, 902 display units of being expert at be 901 with Fig. 6 in the overlapping region of 601 correcting areas, the display unit of this row has reached unanimity in the correction of second area, in the 4th regional correction, should with the display unit of 902 place row and columns benchmark, progressively proofread and correct each display unit downwards and left, and should take into account the consistency of each adjacent display cell, finally reach and proofread and correct 901 whole viewing areas.
The screen intensity adjustment is proofreaied and correct each district according to the method in the example 1.
From embodiment 1 and embodiment 2 as can be known, because the shooting visual angle difference of each display unit, the display unit at equal brightness sub-screen edge than dark slightly its change curve of the brightness of zone line display unit as shown in figure 10, and because different its brightness change curves of various display units and screen material are also different.When adjusting, according to the color saturation curve that the user selects that the colour brightness adjustment of peripheral region display unit is more a little as Figure 11 than the height of zone line, take the visual angle error to remedy, and the colour consistency of finally being observed.Final whole multi-screen connected wall display unit color saturation curve such as Figure 12 that takes.
The primary colours adjustment has guaranteed assembly wall consistency of colour.Adjust each display unit brightness and contrast and guarantee whole multi-screen connected wall brightness uniformity.Computer sends order to means for correcting, set the classification GTG picture that each display unit of combination shows Figure 13, Figure 14 respectively, take and extract screen shots, obtain brightness, the contrast of each display unit reality, and color parameter, the luminance contrast of adjusting each display unit changes evenly captured GTG picture, and each display unit R: G: the B ratio is 1: 1: 1.The method of adjusting is the mode of progressively being adjusted by middle mind-set periphery equally.
Claims (9)
1, a kind of apparatus for correcting multi-screen connected wall is characterized in that comprising: by photographing module (106), view data cache module (108), the common means for correcting (104) that constitutes of master control module (105), and computer (109); Described photographing module (106) and view data cache module (108) communicate to connect with the display screen (101) and the computer (109) of multi-screen connected wall respectively by master control module (105).
2, a kind of apparatus for correcting multi-screen connected wall according to claim 1 is characterized in that:
Described photographing module (106) is used to gather screen color information;
Described view data cache module (108) is finished reading photographing module (106) data;
Described master control module (105) is finished the synchronization signal detection of piecing together the wall display unit, and computer (109), pieces together between the wall and carry out transfer of data;
The display screen of described multi-screen connected wall (101) is by possessing display unit (102) formation that each cell colors parameter has adjustable characteristic;
The wired or wireless mode of employing that communicates to connect of the display screen (101) of described means for correcting (104) and multi-screen connected wall and computer (109);
Described means for correcting (104) should be placed on the scope of all display units (102) that can photograph multi-screen connected wall and be advisable; Piece together in the wall application at jumbotron, means for correcting (104) is taken a plurality of correction subregions respectively, perhaps adopts a plurality of photographing modules (106) that each subregion is taken separately;
Described computer (109) is finished color analysis and calibration function.
3, a kind of multi-screen connected wall bearing calibration, it is characterized in that: each display unit of display screen (101) of setting multi-screen connected wall shows assigned picture respectively, take at least one pictures by photographing module (106) and be stored in view data cache module (108), computer (109) extracts the colouring information of each display unit from picture, proofread and correct according to each display unit color distortion.
4, a kind of multi-screen connected wall bearing calibration according to claim 3 is characterized in that: assigned picture is pure color or its classification color range of particular color; Perhaps white or its classification GTG.
5, a kind of multi-screen connected wall bearing calibration according to claim 3 is characterized in that may further comprise the steps:
(a) selected reference display unit;
(b) take the photo of a plurality of or whole display units at least one the current correcting area that comprises the benchmark display unit;
(c) display unit of correction reference display unit or the display unit periphery proofreaied and correct one by one;
6, a kind of multi-screen connected wall bearing calibration according to claim 5 is characterized in that: before described step (a) is carried out, calculate the colour consistency parameter area that whole assembly wall can reach earlier.
7, a kind of multi-screen connected wall bearing calibration according to claim 5, it is characterized in that: described step (b) is taken two or more correction subregions, perhaps adopt two or more photographing modules that each subregion is taken separately, two adjacent shooting areas should an overlapping at least delegation display unit or a row display unit.
8, according to arbitrary described a kind of multi-screen connected wall bearing calibration in the claim 5 to 7, it is characterized in that: described step (c) specifically may further comprise the steps:
(i) all can take at least one pictures before each the correction, isolate the picture of each display unit, from each picture, extract one or more groups color data, as the color measured values of this display unit;
(ii) compare the color measured values of standard display unit display unit peripheral with it, proofread and correct the color parameter of its peripheral display unit repeatedly, until the difference of the color measured values of the color measured values of the display unit of standard display unit periphery and standard display unit less than specification error; Timing, distance and viewing angle difference according to the observation, display unit color saturation and screen intensity viewing angle is big according to different brightness curves suitably improve, to obtain best observing effect.
9, a kind of multi-screen connected wall bearing calibration according to claim 8 is characterized in that:
Described one or more groups color data is respectively got one group of color data for arbitrary end, two ends, three ends or four ends in the upper end of each picture, left end, lower end, the right-hand member, and timing carries out the comparison of two groups of color data of correspondence of adjacent display cell.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710028437A CN100589583C (en) | 2007-06-05 | 2007-06-05 | Method for correcting multi-screen connected wall |
| PCT/CN2008/000846 WO2008148291A1 (en) | 2007-06-05 | 2008-04-25 | Device and method for calibrating multi-screen wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710028437A CN100589583C (en) | 2007-06-05 | 2007-06-05 | Method for correcting multi-screen connected wall |
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| Publication Number | Publication Date |
|---|---|
| CN101076128A true CN101076128A (en) | 2007-11-21 |
| CN100589583C CN100589583C (en) | 2010-02-10 |
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|---|---|---|---|
| CN200710028437A Expired - Fee Related CN100589583C (en) | 2007-06-05 | 2007-06-05 | Method for correcting multi-screen connected wall |
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| WO (1) | WO2008148291A1 (en) |
Cited By (64)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008148291A1 (en) * | 2007-06-05 | 2008-12-11 | Vtron Technologies Ltd. | Device and method for calibrating multi-screen wall |
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| WO2008148291A1 (en) | 2008-12-11 |
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