CN103413527A - Image acquisition method and display method for LED display screen correction - Google Patents
Image acquisition method and display method for LED display screen correction Download PDFInfo
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Abstract
The invention provides an image acquisition method and display method for LED display screen correction. A part to be corrected of an LED display screen is divided into multiple areas in a virtual mode, each area comprises multiple LED pixels, and each LED pixel comprises LEDs in various colors. The method includes the steps that the LED display screen is controlled to lighten an LED in one color of one LED pixel in each area of the multiple areas; the lightened multiple areas are shot to collect images for correction; the former steps are repeated until all the LEDs in the various colors of the LED pixels in the multiple areas are controlled to be lightened. The invention further provides the display method for correcting the images for correction. According to the image acquisition method and the display method, the part to be corrected is divided into the multiple areas in the virtual mode, the LED in one color of one LED pixel in each area is controlled to be lightened every time, thus the divided areas can be larger when the LED display screen is corrected, frequent moving of image acquisition equipment is eliminated, and the problem that moire patterns occur when images are shot under the circumstance of a small pixel pitch of the LED display screen is solved.
Description
Technical field
The present invention relates to the alignment technique field of LED display, the correction that is specifically related to a kind of LED display is by image-pickup method and display packing.
Background technology
LED display pointwise correction function to LED display later maintenance play important effect, can significantly improve the light tone degree homogeneity of display screen.Along with the development of LED display industry, more and more higher to the requirement of sophistication, the dot spacing of LED display (pel spacing) is done less and less, and the number of LED lamp is more and more, and these bring difficulty all can for the image acquisition work of LED display pointwise correction.
Traditional correcting mode is: sectional image collection correction, and after each sectional image collection correction complete, need the correction personnel by hand image capture device to be aimed to subregion to be corrected, gathered the resolution limit of the image capture device that image uses, partition size generally can only be assigned to 192*128 pixel, for a larger LED display, subregion will be many like this.
In general, image acquisition process is divided into following step during each Subarea calibration:
(1) the correction personnel manually adjust the position of image capture device, aim at the subregion to be corrected of LED display;
(2) utilize correction software control that image capture device gathers monochrome that subregion to be corrected shows or pure color image and the image uploading that will collect to the correcting computer that correction software is installed, the view data of correction software analysis collection is prepared for the later stage;
(3) analyze the view data gathered, whether the image that judgement collects meets the condition of calculating LED pixel correction coefficient;
If meet, the correction personnel manually adjust the next one subregion to be corrected that image capture device is aimed at LED display, and repeating step (1) is to (2), until all subregions have been taken;
If do not meet, adjust the image capture device parameter, repeating step (1) is to (2), until the image gathered meets the condition of calculating LED pixel correction coefficient.
As can be seen here, when proofreading and correct each subregion, need to proofread and correct personnel's hand-driven moving normal moveout correction image capture device align display screens subregion to be corrected, the angle of each subregion shooting will change like this, but also needs correction personnel mobile image acquisition equipment frequently.Therefore traditional bearing calibration is relatively lost time when gathering image, and in the time of also can having image acquisition, due to image capture device and different errors of bringing of angle between subregion to be corrected, correction efficiency is also lower, consuming time longer.
In addition, if the texture of subject is regular and density close to the photoreceptor resolution of image capture device, be easy to like this shoot moire fringes, therefore moire fringes while for the less LED display of dot spacing, taking, easily occurs.
Summary of the invention
The technological deficiency existed for overcoming prior art, the invention provides a kind of correction image-pickup method and display packing of LED display, with the accuracy that improves whereby correction, save manpower, reduce the image acquisition error, reduction correction time, can reduce the moire fringes phenomenon simultaneously.
Particularly, the correction image-pickup method of a kind of LED display that the embodiment of the present invention provides, wherein the zone to be corrected of LED display is virtual marks off a plurality of zones, and single zone comprises a plurality of LED pixels, and single led pixel comprises multiple color LED.Described correction comprises step with image-pickup method: control LED display and light a kind of color LED in a LED pixel in each zone in a plurality of zones; A plurality of zones that shooting is lighted, with the acquisition correction image; And the repetition above-mentioned steps, until the shades of colour LED in the LED pixel in a plurality of zone was all lighted by control.
In addition, the correction method for displaying image of a kind of LED display that the embodiment of the present invention provides, wherein LED display is virtual marks off a plurality of zones, and single zone comprises a plurality of LED pixels, and single led pixel comprises multiple color LED.Described correction comprises step with method for displaying image: sequentially show a plurality of correction images, each correction comprises described a plurality of zone with image, and each proofreaies and correct other LED in a kind of color LED that comprises a LED pixel that is bright state with the single zone in image and the described single zone that is dark state.
As from the foregoing, the present invention marks off a plurality of zones by zone to be corrected is virtual, and each the shooting only controlled a kind of color LED that lights a LED pixel in regional, in the image photographed, bright state LED pel spacing is large, LED display can be got zone to be corrected larger when proofreading and correct, saved correction time to a great extent, also saved correction personnel mobile image acquisition equipment frequently, can reduce in the situation that during the very little photographic images of LED display dot spacing the Imaging because of image capture device the moire fringes phenomenon appears.Because reduced the movement of image capture device, avoid the error of bringing because of the angle difference that each subregion is taken, improved the accuracy of proofreading and correct, effectively save manpower, reduced correction time.
By the detailed description below with reference to accompanying drawing, it is obvious that other side of the present invention and feature become.But it should be known that the only purpose design for explaining of this accompanying drawing, rather than as the restriction of scope of the present invention, this is because it should be with reference to additional claim.Should also be appreciated that, unless otherwise noted, the unnecessary accompanying drawing of drawing to scale, they only try hard to illustrate conceptually structure described herein and flow process.
The accompanying drawing explanation
Fig. 1 be the embodiment of the present invention a kind of LED display zone to be corrected virtual dividing mode for example.
Fig. 2 is the process flow diagram of the correction of a kind of LED display of providing of the embodiment of the present invention with image-pickup method;
Fig. 3 is that the embodiment of the present invention is proofreaied and correct a kind of LED pixel lighting mode with the zone to be corrected of a kind of LED display in image acquisition process.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
For simplified illustration, as shown in Figure 1, the size of first supposing the zone to be corrected of LED display is 9*9 LED pixel P, and will comprise that the zone to be corrected of 9*9 LED pixel P is virtual is divided into nine regional A, and each regional A comprises nine LED pixel P.In addition, for single led pixel P, it for example comprises red (R), green (G), blue (B) three kinds of color LED lamps, and these colors LED lamp is linear array or triangle (delta) is arranged LED pixel P of formation.What need to indicate is, single led pixel P is not limited in and comprises three kinds of color LED lamps of red, green, blue, also can only comprise red, green two kinds of color LED lamps, also can comprise red, green, blue, white or yellow four kinds of color LED lamps, and the quantity of the solid color LED lamp in single led pixel P is not limited to one, can be also a plurality of; In addition, single led pixel P comprises the multiple color LED chip, and these color LED chips are to be encapsulated in same LED lamp.
Below with single led pixel P, constitute example by three LED of red, green, blue and describe a kind of correction of LED display of the embodiment of the present invention in detail by image-pickup method and display packing.
Please refer to Fig. 2, it is that a kind of correction of LED display of the embodiment of the present invention is with the process flow diagram of image-pickup method.Correction in the present embodiment comprises the following steps S100, S120, S140 and S160 with image-pickup method.
Step S100: control LED display and light a kind of color LED in a LED pixel in each zone in a plurality of zones, thereby can show a width correction image.Be understandable that, proofread and correct and use image taking for ease of follow-up zone to be corrected to LED display, need first image capture device to be aimed at zone to be corrected.Behind the zone to be corrected of image capture device being aimed to LED display, the correcting computer that correction software is installed sends control command to the LED pixel lighting mode of LED display with the control LED display.Take nine zones shown in Figure 1 is example, and correcting computer has been known number, the number of the LED pixel P in each regional A and the quantity of the LED in single led pixel P of regional A in the zone to be corrected of LED display in advance.At this, the number of the virtual regional A marked off in zone to be corrected can decide according to the LED pixel quantity in zone to be corrected and the resolution of image capture device for shooting.Suppose that the resolution of image capture device can support to take 192*128 LED pixel, the method according to this invention, take each regional A and comprise nine LED pixels and be example, and the size in zone to be corrected can be extended to and comprise 192*128*9 LED pixel.
Refer to Fig. 3, it illustrates a kind of LED pixel lighting mode in the zone to be corrected of LED display.The collection red LED of take is proofreaied and correct and is example with image, and the zone to be corrected of LED display can sequentially show the first to the 9th width correction image in image acquisition process.With every width, proofread and correct by the extremely upper right of corner LED pixel, the upper left corner LED pixel of image and be numbered according to coordinate position, be sequentially [1,1] ..., [9,9]; It should be noted that in addition, in Fig. 3, every width is proofreaied and correct with the P in image
bRepresent and controlled the LED pixel light, also i.e. this LED pixel P
bIn a kind of color LED by control, lighted, P
aThe LED pixel that representative is not lighted by control.
Particularly, the first width is proofreaied and correct with in image, LED pixel [1,1], [Isosorbide-5-Nitrae], [1,7], [4,1], [4,4], [4,7], [7,1], [7,4], a kind of color LED in [7,7] is lighted by control;
The second width is proofreaied and correct with in image, LED pixel [1,2], [1,5], [1,8], [4,2], [4,5], [4,8], [7,2], [7,5], a kind of color LED in [7,8] is lighted by control;
The 3rd width is proofreaied and correct with in image, LED pixel [1,3], [1,6], [1,9], [4,3], [4,6], [4,9], [7,3], [7,6], a kind of color LED in [7,9] is lighted by control;
The 4th width is proofreaied and correct with in image, LED pixel [2,1], [2,4], [2,7], [5,1], [5,4], [5,7], [8,1], [8,4], a kind of color LED in [8,7] is lighted by control;
The 5th width is proofreaied and correct with in image, LED pixel [2,2], [2,5], [2,8], [5,2], [5,5], [5,8], [8,2], [8,5], a kind of color LED in [8,8] is lighted by control;
The 6th width is proofreaied and correct with in image, LED pixel [2,3], [2,6], [2,9], [5,3], [5,6], [5,9], [8,3], [8,6], a kind of color LED in [8,9] is lighted by control;
The 7th width is proofreaied and correct with in image, LED pixel [3,1], [3,4], [3,7], [6,1], [6,4], [6,7], [9,1], [9,4], a kind of color LED in [9,7] is lighted by control;
The 8th width is proofreaied and correct with in image, LED pixel [3,2], [3,5], [3,8], [6,2], [6,5], [6,8], [9,2], [9,5], a kind of color LED in [9,8] is lighted by control;
The 9th width is proofreaied and correct with in image, LED pixel [3,3], [3,6], [3,9], [6,3], [6,6], [6,9], [9,3], [9,6], a kind of color LED in [9,9] is lighted by control.
In addition, be understandable that, use image for gathering other colors LED correction, for example gather green or blue led correction image, still can sequentially show in the manner described above the first to the 9th width correction image, just these corrections are changed by the color of image.
Step S120: utilize image capture device to take a plurality of zones of lighting, with the acquisition correction image.Specifically can be: every demonstration the above-mentioned first to the 9th width is proofreaied and correct with the width in image, namely the correction of this demonstration is taken with image; Therefore nine width are proofreaied and correct needs to take nine times with image.
Step S140: whether the correction that judgement gathers meets the condition of calculating LED pixel correction coefficient with image; Also can, after step S120 of every execution, by the correction software in the correcting computer with image capture device is connected, the width gathered be proofreaied and correct and judge with image.If the determination result is NO, mean that the correction gathered does not meet the condition of calculating LED pixel correction coefficient with image, the correction also namely collected is undesirable with image, by correction software, control image capture device and adjust its parameter, and again perform step S120, until proofreading and correct with image, the width collected meets the condition of calculating LED pixel correction coefficient.If judgment result is that, be, by the correcting computer storage of collected to the correction image, and continue execution step S160.
Step S160: judge whether the shades of colour LED in each LED pixel in above-mentioned a plurality of zone was all lighted by control.If the determination result is NO, mean also not gather complete, skip to step S100; Otherwise, if judgment result is that, be to mean that required red, green, blue LED proofreaies and correct by image acquisition complete; Ideally (also i.e. each correction of taking is all to meet the condition of calculating LED pixel correction coefficient with image), gathers every kind of color correction and need to take 9 times with image, and gathering red, green and blue three-color correction needs to take 27 times with image.
Described herein is that in above-described embodiment is to have gathered a kind of color LED correction to use image for example, then carries out another kind of color LED and proofread and correct the collection with image; In fact, every three width that show continuously of also can take are proofreaied and correct and are a unit with image, that is to say that this three width correction is respectively red, green, blue-correction image with image; Be perhaps other acquisition modes, the shades of colour LED in each LED pixel P in regional A all is lit and took as long as can realize.In addition, zone to be corrected described in the above embodiment of the present invention can be the viewing area of whole LED display, can be the viewing area of one or more LED casings, can be the viewing area of one or more LED lamp plates, or the zone of other any appointments.
It is worth mentioning that, by said method, gather complete shades of colour LED and proofread and correct with after image, correcting computer utilizes correction software to proofread and correct the LED pixel correction coefficient of analyzing and generate zone to be corrected with image according to the shades of colour LED collected.The LED pixel correction coefficient in the zone to be corrected generated provides the receiving card to LED display (or claiming LED display control panel), makes the image after the zone to be corrected of LED display can demonstrate correction.
As can be known by above-described embodiment, the present invention marks off a plurality of zones by zone to be corrected is virtual, and each the shooting only controlled a kind of color LED that lights a LED pixel in regional, in the image photographed, bright state LED pel spacing is large, LED display can be got zone to be corrected larger when proofreading and correct, saved correction time to a great extent, also saved correction personnel mobile image acquisition equipment frequently, can reduce in the situation that during the very little photographic images of LED display dot spacing the Imaging because of image capture device the moire fringes phenomenon appears.Because reduced the movement of image capture device, avoid the error of bringing because of the angle difference that each subregion is taken, improved the accuracy of proofreading and correct, effectively save manpower, reduced correction time.
In addition, as can be seen from Figure 3, in the zone to be corrected of LED display, sequentially show and proofread and correct while using image, every width is proofreaied and correct and is comprised a plurality of regional A with image, and each correction comprises with the single regional A in image a LED pixel P who is bright state
bA kind of color LED and other LED that are in the described single regional A of dark state (comprise each LED pixel P in this single regional A
aIn shades of colour LED and LED pixel P
bIn other colors LED).And, from the angle in whole zone to be corrected, two adjacent LED pixel P that light
bBetween have at least a LED pixel P who is not lit
a, also i.e. direct neighbor not; And with the LED pixel P that is bright state
bThe LED pixel P of direct neighbor
aAll be dark state.
In addition, it should be noted that, the single kind color LED included for single led pixel is a plurality of situations, while lighting single led pixel, can be one that only lights in this kind color LED, thereby a plurality of LED lights several times at every turn; Can be also at every turn when lighting single led pixel, light the whole LED in this kind color LED.
In sum, applied specific case herein the correction of LED display of the present invention is set forth with principle and the embodiment of image-pickup method and display packing, the explanation of above embodiment is just be used to helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention; all will change in specific embodiments and applications; in sum, this description should not be construed as limitation of the present invention, and protection scope of the present invention should be as the criterion with appended claim.
Claims (10)
1. the correction image-pickup method of a LED display, the zone to be corrected of described LED display is virtual marks off a plurality of zones, and single zone comprises a plurality of LED pixels, and single led pixel comprises multiple color LED; It is characterized in that, described correcting image acquisition method comprises:
(a) control described LED display and light a kind of color LED in a LED pixel in each zone in described a plurality of zones;
(b) take described a plurality of zones of lighting, with the acquisition correction image; And
(c) repeating step (a) and (b), until the shades of colour LED in the described a plurality of LED pixels in described a plurality of zone was all lighted by control.
2. correction image-pickup method according to claim 1, is characterized in that, also comprises step:
Whether the correction (b1) gathered in determining step (b) meets the condition of calculating LED pixel correction coefficient with image;
If the determination result is NO for step (b1), perform step again (b); And
If judgment result is that of step (b1) is to perform step (c).
3. correction image-pickup method according to claim 1, it is characterized in that, while for a kind of color LED in a LED pixel in single zone, being lit, with the LED pixel of the described LED pixel direct neighbor be lit, all do not light in described single zone.
4. correction image-pickup method according to claim 1, is characterized in that, " a kind of color LED " in step (a) refers to a kind of color LED lamp, or refer to a kind of color LED chip.
5. correction image-pickup method according to claim 1, is characterized in that, when the quantity of a kind of color LED is a plurality of, lights a LED or a plurality of LED in described a kind of color LED at every turn.
6. correction image-pickup method according to claim 1, is characterized in that, the number in the virtual described a plurality of zones that mark off, described zone to be corrected depends on the LED pixel quantity in described zone to be corrected and the resolution of image capture device for shooting.
7. the correction method for displaying image of a LED display, described LED display is virtual marks off a plurality of zones, and single zone comprises a plurality of LED pixels, and single led pixel comprises multiple color LED, it is characterized in that, described correction comprises step with method for displaying image:
Sequentially show a plurality of correction images, each correction comprises described a plurality of zone with image, and each proofreaies and correct other LED in a kind of color LED that comprises a LED pixel that is bright state with the single zone in image and the described single zone that is dark state.
8. correction method for displaying image according to claim 7, is characterized in that, the single zone for showing, all be dark state with the described LED pixel that is the LED pixel direct neighbor of bright state.
9. correction method for displaying image according to claim 7, is characterized in that, described " a kind of color LED " refers to a kind of color LED lamp, or refer to a kind of color LED chip.
10. correction method for displaying image according to claim 7, is characterized in that, when the quantity of a kind of color LED was a plurality of, single correction is bright state with a LED in the described a kind of color LED in image or a plurality of LED all is bright state.
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Application publication date: 20131127 |