CN105448230A - LED display device brightness and chroma correction method and system based on human vision - Google Patents
LED display device brightness and chroma correction method and system based on human vision Download PDFInfo
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Abstract
The invention relates to an LED display device brightness and chroma correction method and system based on human vision. The correction method includes the following steps of: (a) calculating an initial brightness and chroma coefficient average value of an area to be corrected; (b) controlling first correction frames of the area to be corrected and an observation reference area to be observed by human eyes, wherein the first correction frames of the area to be corrected and the observation reference area display identical colors; (c) responding to a plurality of component values in a color model input by performing a component adjustment operation on the first correction frame of the area to be corrected, and calculating a modified brightness and chroma coefficient average value of the area to be corrected; (d) calculating an adjustment matrix through the initial brightness and chroma coefficient average value and the modified brightness and chroma coefficient mean value; and (e) applying the adjustment matrix on a plurality of LED pixel points in the area to be corrected to obtain a modified brightness and chroma coefficient. According to the method, rightness and chroma differences among areas can be eliminated through human vision adjustment, and the rightness and the chroma of an LED are highly consistent with that of the human eyes.
Description
Technical field
The present invention relates to LED and show alignment technique field, be specifically related to a kind of LED display bright chroma bearing calibration based on human eye vision and a kind of LED display bright chroma corrective system based on human eye vision.
Background technology
The advantages such as LED display is bright in luster with it, visuality is high, low in energy consumption, environmental protection and energy saving have been widely used in the place such as city square, commercial center, but due to current LED production level limited, make LED display bright chroma there is human eye vision inconsistence problems.The basic reason of this bright chroma inconsistence problems is LED itself, the such as LED of same production batch, brightness may have the change of 50%, and wavelength (colourity) may have the change of 15 ~ 20nm, and these differences are very significant concerning human eye vision.
Strictly consistent present situation can not be produced by control LED in order to tackle, LED manufacturer takes the method for brightness and colourity stepping, the industrial stepping standard that current LED manufacturer issues is the brightness change of 25% ~ 40% and the colourity change of 5nm, each class LED is fully mixed lamp, LED display producer can use same batch with class LED to assemble same LED display, but this stepping process costliness is consuming time, and the stricter cost of classifying requirement is also higher.It is very limited that this identical production batch LED also can cause belonging to same class LED quantity through stepping, so keep away the unavoidable identical class LED of different production batch that uses in real world applications to assemble same LED display, so create the display screen bright chroma inconsistence problems of the different batches LED in industry.
For same batch with class LED display, between LED point, bright chroma difference is less, carry out pointwise adjustment by human eye vision at first in industry, but because of human eye, the reasons such as colourity difference insensitive (because difference area is too small), adjustment inefficiency are lighted to single lamp and abandon this way, there is the alignment technique of width modulation (PWM) subsequently, device measuring mode based on width modulation substantially increases correction efficiency, also solves the bright chroma uniformity sex chromosome mosaicism between LED display lamp point.Device measuring correcting mode at present based on width modulation has multiple, such as measure based on industrial camera, colorimeter coordinates the point-to-point correction systems such as digital camera measurement, their trimming process is roughly all relative the or absolute light tone angle value being gathered all LED points on display screen by measuring equipment, and then calculate the correction coefficient of all LED point, also namely regulate its CIE-XYZ value to basically identical according to CIE standard by carrying out compensating coefficient to all LED points, thus seek the basically identical of bright chroma on human eye vision, different electric current is regulated again according to the correction coefficient of every LED lamp point, reach whole LED display bright chroma uniformity.
For the display screen adopting the identical class LED of different batches, common connecting method has:
Connecting method 1: casing (or module) inside comprises the identical class LED of multiple different batches, multiple batches of LED are comprised in each casing (or module) of namely LED display to be spliced, they are mixed break up at each casing (or module) inner, like this then cause the bright chroma difference in region (corresponding casing or module), certainly interregional exist bright chroma difference equally;
Connecting method 2: casing (or module) inside is same batch of identical class LED, and LED display is made up of the casing (or module) of multiple different batches LED, like this then cause interregional bright chroma difference, and bright chroma homogeneity in region is better.
At present, for adopting the LED display of connecting method 1, remaining and improving bright chroma difference between lamp point by point-to-point correction system; And for adopting the LED display of connecting method 2, because the measuring accuracy of existing measuring equipment and point-to-point correction system is all lower than human eye vision, as shown in the table, it is that human eye test experiments data and measuring equipment accuracy data contrast, also illustrate that human eye vision precision is higher than measuring equipment precision, and human eye vision is more large more responsive to the region area of bright chroma difference, even if make it through pointwise correction, human eye still can perceive slight interregional bright chroma difference.Pointwise correction mode at present based on device measuring is all difficult to make this LED display bright chroma that there is multiple batches of region difference reach high consistency, can not meet human eye vision requirement.
In addition, for adopting the LED display of connecting method 2 also can regulate based on human eye vision, tradition regulates obvious efficiency the lowest to different batches inside LED single-point one by one, does not now substantially re-use; And also have a kind of comparatively conventional method to be qualitatively judged by human eye vision exactly at present, repeatedly set different desired values, use the means of similar correction to regenerate the correction coefficient of all LED points in each region, it is relatively low that this mode is also proved to be its efficiency in actual applications.
In view of this, be necessary the LED display for different batches region, devise and a kind ofly by human eye vision, the method that quick adjustment eliminates the interregional bright chroma difference of different batches is carried out to the bright chroma in different batches region, make the LED display bright chroma in multiple batches of region reach human eye vision unanimously more convenient, quick.
Summary of the invention
Therefore, for overcoming the technological deficiency that prior art exists, the present invention proposes a kind of LED display bright chroma bearing calibration based on human eye vision and a kind of LED display bright chroma corrective system based on human eye vision.
Particularly, a kind of LED display bright chroma bearing calibration based on human eye vision that the embodiment of the present invention proposes, comprises step: (a) calculates the initial bright chroma correction coefficient average in region to be corrected; B () controls described region to be corrected and observes first of reference zone display same color to correct picture for eye-observation; Multiple component values in c color model that () response inputs because correcting picture to described first of described region to be corrected display and carrying out component adjustment operation, calculate bright chroma correction coefficient average after the correction in described region to be corrected; D () utilizes described initial bright chroma correction coefficient average and described correction after, bright chroma correction coefficient mean value computation goes out to regulate matrix; And described adjustment matrix is acted on multiple LED pixel in described region to be corrected and bright chroma correction coefficient after obtaining the correction in described region to be corrected by (e).
In one embodiment of the invention, above-mentioned first correction picture is sprite.
In one embodiment of the invention, above-mentioned sprite is selected from redness, green, one of blueness and white picture.
In one embodiment of the invention, above-mentioned region to be corrected and observation reference zone are the adjacent area of same LED display.
In one embodiment of the invention, the above-mentioned LED display bright chroma bearing calibration based on human eye vision also comprises step: change described region to be corrected and observe reference zone display described first that to correct picture be that display second corrects picture for eye-observation and bright chroma correction coefficient average after described correction is set to described initial bright chroma correction coefficient average, and again performs step (c) to (e); Wherein said second color correcting picture is different from the color that described first corrects picture.
In one embodiment of the invention, above-mentioned steps (c) comprising: responding the multiple component values in the color model inputted because carrying out component adjustment operation to the described first correction picture of described region to be corrected display, multiple component values of described input being converted to the RGB component value in RGB color model; And bright chroma correction coefficient average after the correction calculating described region to be corrected according to the RGB component value be converted to.
In addition, a kind of LED display bright chroma corrective system based on human eye vision of embodiment of the present invention proposition comprises: bright chroma correction coefficient mean value computation module and adjustment matrix computations module after initial bright chroma correction coefficient average acquisition module, correction picture display control module, correction.Wherein, initial bright chroma correction coefficient average acquisition module is for obtaining the initial bright chroma correction coefficient average in region to be corrected; Correct picture display control module for controlling the correction picture of described region to be corrected and observation reference zone display same color; Bright chroma correction coefficient mean value computation module after revising, for responding the multiple component values in the color model that inputs because carrying out component adjustment operation to the described correction picture of described region to be corrected display, calculate bright chroma correction coefficient average after the correction in described region to be corrected; And bright chroma correction coefficient mean value computation goes out to regulate matrix after regulating matrix computations module to be used for utilizing described initial bright chroma correction coefficient average and described correction, obtain bright chroma correction coefficient after the correction in described region to be corrected for the multiple LED pixel acting on described region to be corrected.
In one embodiment of the invention, after above-mentioned correction, bright chroma correction coefficient mean value computation module comprises component transform subblock and mean value computation submodule.Wherein, multiple component values of described input are converted to the RGB component value in RGB color model by the multiple component values in the color model that component transform subblock carries out component adjustment operation for the described correction picture responded because showing described region to be corrected and inputs; Mean value computation submodule is used for calculating bright chroma correction coefficient average after the correction in described region to be corrected according to the RGB component value that is converted to.
In one embodiment of the invention, above-mentioned region to be corrected and observation reference zone are the adjacent area of same LED display.
In one embodiment of the invention, above-mentioned correction picture is sprite, and described sprite is such as selected from redness, green, one of blueness and white picture.
As from the foregoing, the embodiment of the present invention regulates based on human eye vision, revises LED bright chroma correction coefficient fast, eliminate interregional bright chroma difference by multiple different component adjustment operation; It can have following beneficial effect: the LED of bright chroma difference between domain of the existence 1) can be made to reach the height of bright chroma on human eye vision consistent; 2) interregional bright chroma can be completed when departing from conventional correction equipment to regulate; 3) greatly shorten adjustment to expend time in, improve correction efficiency.
By the detailed description below with reference to accompanying drawing, other side of the present invention and feature become obvious.But it should be known that this accompanying drawing is only the object design of explanation, instead of as the restriction of scope of the present invention, this is because it should with reference to additional claim.Should also be appreciated that, unless otherwise noted, unnecessaryly draw accompanying drawing to scale, they only try hard to structure described herein and flow process are described conceptually.
Accompanying drawing explanation
Fig. 1 is the steps flow chart schematic diagram of the LED display bright chroma bearing calibration based on human eye vision of first embodiment of the invention.
Fig. 2 is the steps flow chart schematic diagram of the LED display bright chroma bearing calibration based on human eye vision of second embodiment of the invention.
Fig. 3 is the module diagram of the LED display bright chroma corrective system based on human eye vision of third embodiment of the invention.
Fig. 4 is the submodule schematic diagram based on bright chroma correction coefficient mean value computation module after the correction in the LED display bright chroma corrective system of human eye vision of the embodiment of the present invention.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.
[the first embodiment]
Refer to Fig. 1, it is the steps flow chart schematic diagram of the LED display bright chroma bearing calibration based on human eye vision of first embodiment of the invention.The LED display bright chroma bearing calibration of the present embodiment is suitable for being applied in the LED display comprising multiple concatenation unit, and bearing calibration can perform after multiple concatenation unit is spliced into LED display, also can perform before multiple concatenation unit is spliced into LED display.And multiple concatenation unit can be that multiple LED box (comprising one or more LED lamp panel) is for being spliced into LED display, or multiple LED lamp panel is for being spliced into LED box, there is bright chroma difference in these concatenation units, and the LED display bright chroma bearing calibration based on human eye vision of the present embodiment can be used for eliminating or compensating the bright chroma difference existed between concatenation unit each other.In brief, the LED display bright chroma bearing calibration based on human eye vision of the present embodiment is mainly used in elimination or the compensation of interregional bright chroma difference.
Holding above-mentioned, for realizing the normal display of LED display such as LED display, usually needing configuration LED display control program to be connected with LED display.Each concatenation unit that LED display control program is mainly used in carrying out delivering to after Data Format Transform, gray scale layout and bright chroma correct to video source signal LED display shows.Usually, LED display control program is roughly divided into synchronous control system and asynchronous control system.For synchronous control system, it mainly comprises plays computing machine, sending card and receiving card, and even some synchronous control system can by sending card Function Integration Mechanism to receiving card; For asynchronous control system, its receiving card mainly comprising asynchronous control-card and may need; In addition, show Data correction bright chroma correction coefficient to be normally stored in receiving card or asynchronous control-card.
Below in conjunction with Fig. 1, the LED display bright chroma bearing calibration based on human eye vision of first embodiment of the invention is described in detail, and be the citing of the RGB full-color LED display screen to be spliced by multiple LED box as LED display, there is bright chroma difference between (region) in these LED box, and is configured with synchronous control system; But the present invention is not as limit.
Step S110: the initial bright chroma correction coefficient average avg1 obtaining region to be corrected.In the present embodiment, in order to avoid the read-write operation of all LED pixel bright chroma correction coefficient in region to be corrected, the calculating of initial bright chroma correction coefficient average avg1 is performed by receiving card or sending card, and the bright chroma correction coefficient of its all LED pixels treated in correcting area carries out mean value computation operation:
Wherein, avg1 is the initial bright chroma correction coefficient average of all LED pixels in region to be corrected and is 3 × 3 matrix of coefficients, red
ri, red
gi, red
bibe the i-th LEDs red image R, G, B three-component correction coefficient value, green
ri, green
gi, green
bibe i-th LEDs green image R, G, B three-component correction coefficient value, blue
ri, blue
gi, blue
bibe i-th LEDs blue image R, G, B three-component correction coefficient value, i gets 1 ..., n; N is LED pixel number in region to be corrected.It should be noted that, the replacement scheme calculating the initial bright chroma correction coefficient average avg1 in region to be corrected has a lot, as the initial bright chroma correction coefficient average utilizing the bright chroma correction coefficient of the single led pixel of regional center to be corrected to represent region to be corrected, or LED pixel bright chroma correction coefficient average in the neighborhood of region to be corrected is utilized to represent the initial bright chroma correction coefficient average etc. in region to be corrected.Afterwards, after calculating the initial bright chroma correction coefficient average avg1 in region to be corrected, host computer will be sent to for follow-up use to avg1.In addition, be understandable that, the initial bright chroma correction coefficient treating all LED pixels in correcting area is carried out mean value computation and also can be carried out in host computer.
Step S130: the correction picture controlling region to be corrected and observation reference zone display same color, such as, all show the sprites such as red picture, green picture, blue picture or white picture.In the present embodiment, observing reference zone is such as belong to same LED display with region to be corrected, and preferably, compares for the ease of eye-observation, and region to be corrected and observation reference zone are the region of placed adjacent.In addition, be understandable that, carrying out in the process of bright chroma correction to the region multiple to be corrected of LED display, observing reference zone can be same region, also can be different regions.
Step S150: the correction picture responded because treating correcting area display carries out RGB component adjustment operation and RGB component value in the RGB color model that inputs, calculates bright chroma correction coefficient average avg2 after the correction in region to be corrected.In the present embodiment, after correction picture by eye-observation display same color, the bright chroma of the correction picture of the correction picture shown to make region to be corrected and the display of observation reference zone reaches unanimity, need to regulate the RGB component in RGB color model, (matrix of coefficients identical with avg1 size is it typically is to obtain revising rear bright chroma correction coefficient average avg2 with each element value that this changes in initial bright chroma correction coefficient average avg1, also be such as 3 × 3 matrix of coefficients), and then change the display effect of the correction picture that region to be corrected shows.Because all colours is all mixed by RGB tri-kinds of color components to produce, when therefore regulating region to be corrected to show the different colours such as red, green, blue, white, corresponding RGB component namely regulates RGB proportioning, and three elements in RGB tri-kinds of color component all corresponding bright chroma correction coefficient averages.
Step S170: after utilizing initial bright chroma correction coefficient average avg1 and correction, bright chroma correction coefficient average avg2 calculates and regulates matrix A djust.Initial bright chroma correction coefficient average avg1 is transformed into the matrix revising rear bright chroma correction coefficient average avg2 by the adjustment matrix A djust in the present embodiment.
Step S190: obtain bright chroma correction coefficient after the correction in region to be corrected by regulating matrix A djust to act on multiple LED pixel in region to be corrected.At this, matrix A djust is regulated to be such as the sending card or the receiving card that are sent to synchronous control system by host computer, the initial bright chroma correction coefficient matrix of each LED pixel and the product regulating matrix A djust is calculated by sending card or receiving card, and then the Fruiting coefficient matrix of each LED pixel is revised rear bright chroma correction coefficient as it, thus realize the overall variation of all LED pixel bright chroma in this region to be corrected:
Result
iOriginal
i*Adjust
Wherein, Reslut
ibe i-th LED pixel Fruiting coefficient matrix, Original
ibe i-th initial bright chroma correction coefficient matrix of LED pixel, Adjust is for regulating matrix; I gets 1 ..., n; N is LED pixel number in region to be corrected.Certainly, also can be that the Fruiting coefficient matrix of each LED pixel calculating region to be corrected in host computer revises rear bright chroma correction coefficient as it, be sent to receiving card after having calculated again to replace initial bright chroma correction coefficient.Afterwards, owing to revising the calibration result of rear bright chroma correction coefficient, the correction picture that human eye can observe region to be corrected display changes; Whether the correction picture again shown by the correction picture after eye-observation regional change to be corrected and observation reference zone exists the bright chroma difference perceived, if existed, then correct picture for current color, repeat above-mentioned steps, if there is no, then represent that current color corrects Picture Calibration and completes, carry out the correction of next color correction picture.
It is worth mentioning that, for simplifying the operation, usually can control region to be corrected and observe reference zone first to show a certain same color correction picture such as red picture, the bright chroma difference perceived is there is not in the red picture that the red picture that the adjustment matrix A djust obtained when being regulated by RGB component makes region to be corrected show shows with observation reference zone on human eye vision, then control break region to be corrected and observation reference zone show another same color correction picture such as green picture, and bright chroma correction coefficient average avg2 can set the initial bright chroma correction coefficient average avg1 as a rear correct operation after the correction that a front correct operation obtains, by that analogy, until the picture such as redness, green, blueness, white of region to be corrected display all can not perceive bright chroma difference with the corresponding color picture that observation reference zone shows on human eye vision, the bright chroma namely completing above-mentioned region to be corrected corrects.Be understandable that, the DISPLAY ORDER of above-mentioned redness, green, blueness and white picture does not limit; For other regions to be corrected of LED display, then with reference to above-mentioned aligning step, can not repeat them here.
[the second embodiment]
Refer to Fig. 2, it is the steps flow chart schematic diagram of the LED display bright chroma bearing calibration based on human eye vision of second embodiment of the invention.The LED display bright chroma bearing calibration of the present embodiment is suitable for being applied in the LED display comprising multiple concatenation unit, and bearing calibration can perform after multiple concatenation unit is spliced into LED display, also can perform before multiple concatenation unit is spliced into LED display.And multiple concatenation unit can be that multiple LED box (comprising one or more LED lamp panel) is for being spliced into LED display, or multiple LED lamp panel is for being spliced into LED box, there is bright chroma difference in these concatenation units, and the LED display bright chroma bearing calibration based on human eye vision of the present embodiment can be used for eliminating or compensating the bright chroma difference existed between concatenation unit each other.In brief, the LED display bright chroma bearing calibration based on human eye vision of the present embodiment is mainly used in elimination or the compensation of interregional bright chroma difference.
Holding above-mentioned, for realizing the normal display of LED display such as LED display, usually needing configuration LED display control program to be connected with LED display.Each concatenation unit that LED display control program is mainly used in carrying out delivering to after Data Format Transform, gray scale layout and bright chroma correct to video source signal LED display shows.Usually, LED display control program is roughly divided into synchronous control system and asynchronous control system.For synchronous control system, it mainly comprises plays computing machine, sending card and receiving card, and even some synchronous control system can by sending card Function Integration Mechanism to receiving card; For asynchronous control system, its receiving card mainly comprising asynchronous control-card and may need; In addition, show Data correction bright chroma correction coefficient to be normally stored in receiving card or asynchronous control-card.
Below in conjunction with Fig. 2, the LED display bright chroma bearing calibration based on human eye vision of second embodiment of the invention is described in detail, and be the citing of the RGB full-color LED display screen to be spliced by multiple LED box as LED display, there is bright chroma difference between (region) in these LED box, and is configured with synchronous control system; But the present invention is not as limit.
Step S210: the initial bright chroma correction coefficient average avg1 obtaining region to be corrected.In the present embodiment, in order to avoid the read-write operation of all LED pixel bright chroma correction coefficient in region to be corrected, the calculating of initial bright chroma correction coefficient average avg1 is performed by receiving card or sending card, and the bright chroma correction coefficient of its all LED pixels treated in correcting area carries out mean value computation operation:
Wherein, avg1 is the initial bright chroma correction coefficient average of all LED pixels in region to be corrected and is 3 × 3 matrix of coefficients, red
ri, red
gi, red
bibe the i-th LEDs red image R, G, B three-component correction coefficient value, green
ri, green
gi, green
bibe i-th LEDs green image R, G, B three-component correction coefficient value, blue
ri, blue
gi, blue
bibe i-th LEDs blue image R, G, B three-component correction coefficient value, i gets 1 ..., n; N is LED pixel number in region to be corrected.It should be noted that, the replacement scheme calculating the initial bright chroma correction coefficient average avg1 in region to be corrected has a lot, as the initial bright chroma correction coefficient average utilizing the bright chroma correction coefficient of the single led pixel of regional center to be corrected to represent region to be corrected, or LED pixel bright chroma correction coefficient average in the neighborhood of region to be corrected is utilized to represent the initial bright chroma correction coefficient average etc. in region to be corrected.Afterwards, after calculating the initial bright chroma correction coefficient average avg1 in region to be corrected, host computer will be sent to for follow-up use to avg1.In addition, be understandable that, the initial bright chroma correction coefficient treating all LED pixels in correcting area is carried out mean value computation and also can be carried out in host computer.
Step S230: the correction picture controlling region to be corrected and observation reference zone display same color, such as, all show the sprites such as red picture, green picture, blue picture or white picture.In the present embodiment, observing reference zone is such as belong to same LED display with region to be corrected, and preferably, compares for the ease of eye-observation, and region to be corrected and observation reference zone are the region of placed adjacent.In addition, be understandable that, carrying out in the process of bright chroma correction to the region multiple to be corrected of LED display, observing reference zone can be same region, also can be different regions.
Step S250a: the HSI component value in the HSI color model that the correction picture responded because treating correcting area display carries out HSI component adjustment operation and inputs, converts the RGB component value in RGB color model to by the HSI component value of input.In the present embodiment, after correction picture by eye-observation display same color, the bright chroma of the correction picture of the correction picture shown to make region to be corrected and the display of observation reference zone reaches unanimity, according to the custom of user to HSI (Hue (tone), Saturation (color saturation), Intensity (brightness)) HSI component in color model regulates, each element value in initial bright chroma correction coefficient average avg1 is changed to obtain revising rear bright chroma correction coefficient average avg2 with this, and then change the display effect of the correction picture that region to be corrected shows.Because all colours is all mixed by RGB tri-kinds of color components to produce, when therefore regulating region to be corrected to show the different colours such as red, green, blue, white, corresponding RGB component namely regulates RGB proportioning, and three elements in RGB tri-kinds of color component all corresponding bright chroma correction coefficient averages.And between HSI component and RGB component, there are certain mapping relations, as shown in the formula:
If 0≤H<120 °, then
If 120 °≤H<240 °, then
If 240 °≤H<360 °, then
Step S250b: calculate bright chroma correction coefficient average avg2 after the correction in region to be corrected according to the RGB component value be converted to.In the present embodiment, after revising, bright chroma correction coefficient average avg2 is generally the matrix of coefficients identical with initial bright chroma correction coefficient average avg1 size, such as, be also 3 × 3 matrix of coefficients.
Step S270: after utilizing initial bright chroma correction coefficient average avg1 and correction, bright chroma correction coefficient average avg2 calculates and regulates matrix A djust.Initial bright chroma correction coefficient average avg1 is transformed into the matrix revising rear bright chroma correction coefficient average avg2 by the adjustment matrix A djust in the present embodiment.
Step S290: obtain bright chroma correction coefficient after the correction in region to be corrected by regulating matrix A djust to act on multiple LED pixel in region to be corrected.At this, matrix A djust is regulated to be such as the sending card or the receiving card that are sent to synchronous control system by host computer, the initial bright chroma correction coefficient matrix of each LED pixel and the product regulating matrix A djust is calculated by sending card or receiving card, and then the Fruiting coefficient matrix of each LED pixel is revised rear bright chroma correction coefficient as it, thus realize the overall variation of all LED pixel bright chroma in this region to be corrected:
Result
i＝Original
i*Adjust
Wherein, Reslut
ibe i-th LED pixel Fruiting coefficient matrix, Original
ibe i-th initial bright chroma correction coefficient matrix of LED pixel, Adjust is for regulating matrix; I gets 1 ..., n; N is LED pixel number in region to be corrected.Certainly, also can be that the Fruiting coefficient matrix of each LED pixel calculating region to be corrected in host computer revises rear bright chroma correction coefficient as it, be sent to receiving card after having calculated again to replace initial bright chroma correction coefficient.Afterwards, owing to revising the calibration result of rear bright chroma correction coefficient, the correction picture that human eye can observe region to be corrected display changes; Whether the correction picture again shown by the correction picture after eye-observation regional change to be corrected and observation reference zone exists the bright chroma difference perceived, if existed, then correct picture for current color, repeat above-mentioned steps, if there is no, then represent that current color corrects Picture Calibration and completes, carry out the correction of next color correction picture.
It is worth mentioning that, for simplifying the operation, usually can control region to be corrected and observe reference zone first to show a certain same color correction picture such as red picture, the bright chroma difference perceived is there is not in the red picture that the red picture that the adjustment matrix A djust obtained when being regulated by RGB component makes region to be corrected show shows with observation reference zone on human eye vision, then control break region to be corrected and observation reference zone show another same color correction picture such as green picture, and bright chroma correction coefficient average avg2 can set the initial bright chroma correction coefficient average avg1 as a rear correct operation after the correction that a front correct operation obtains, by that analogy, until the picture such as redness, green, blueness, white of region to be corrected display all can not perceive bright chroma difference with the corresponding color picture that observation reference zone shows on human eye vision, the bright chroma namely completing above-mentioned region to be corrected corrects.Be understandable that, the DISPLAY ORDER of above-mentioned redness, green, blueness and white picture does not limit; For other regions to be corrected of LED display, then with reference to above-mentioned aligning step, can not repeat them here.
[the 3rd embodiment]
Refer to Fig. 3, it is the module diagram of the LED display bright chroma corrective system based on human eye vision of third embodiment of the invention.As shown in Figure 3, LED display bright chroma corrective system 300 based on human eye vision is such as realized by the software being installed on computer system, the broadcasting computing machine or the link that are such as arranged on synchronous control system are play in other computer systems of computing machine, or are mounted in the computer system of the asynchronous control-card connecting asynchronous control system.
Particularly, the LED display bright chroma corrective system 300 based on human eye vision of the present embodiment comprises: bright chroma correction coefficient mean value computation module 350 and adjustment matrix computations module 370 after initial bright chroma correction coefficient average acquisition module 310, correction picture display control module 330, correction.Wherein, initial bright chroma correction coefficient average acquisition module 310 is for obtaining the initial bright chroma correction coefficient average avg1 in region to be corrected, and detail can with reference to the step S210 of the step S110 of aforementioned first embodiment and the second embodiment.Correct picture display control module 330 for controlling region to be corrected and observing the correction picture of reference zone display same color, detail can with reference to the step S230 of the step S130 of aforementioned first embodiment and the second embodiment.Multiple component values in the color model that the rear bright chroma correction coefficient mean value computation module 350 of correction is carried out component adjustment operation for the correction picture responded because treating correcting area display and inputted, calculate bright chroma correction coefficient average avg2 after the correction in region to be corrected, detail can with reference to the step S250a of the step S150 of aforementioned first embodiment and the second embodiment and S250b.Matrix computations module 370 is regulated to calculate adjustment matrix A djust for utilizing initial bright chroma correction coefficient average avg1 and revising rear bright chroma correction coefficient average avg2, the multiple LED pixel acting on region to be corrected for follow-up and bright chroma correction coefficient after obtaining the correction in region to be corrected, detail can with reference to the step S270a of the step S170 of aforementioned first embodiment and S190 and the second embodiment and S290.
In addition, in other embodiments, such as, shown in Fig. 4, after revising, bright chroma correction coefficient mean value computation module 350 also comprises component transform subblock 3501 and mean value computation submodule 3503.Wherein, multiple component values in the color model that component transform subblock 3501 carries out component adjustment operation for the correction picture responded because treating correcting area display and inputs, multiple component values of input are converted to the RGB component value in RGB color model, detail can with reference to the step S250a of above-mentioned second embodiment.Mean value computation submodule 3503 is for calculating bright chroma correction coefficient average avg2 after the correction in region to be corrected according to the RGB component value that is converted to, detail can with reference to the step S250b of above-mentioned second embodiment.
In sum, the embodiment of the present invention regulates based on human eye vision, revises LED bright chroma correction coefficient fast, eliminate interregional bright chroma difference by multiple different component adjustment operation; It can have following beneficial effect: the LED of bright chroma difference between domain of the existence 1) can be made to reach the height of bright chroma on human eye vision consistent; 2) interregional bright chroma can be completed when departing from conventional correction equipment to regulate; 3) greatly shorten adjustment to expend time in, improve correction efficiency.
Apply specific case herein to set forth the principle of the bearing calibration of LED display bright chroma and system that the present invention is based on human eye vision and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, 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., based on a LED display bright chroma bearing calibration for human eye vision, it is characterized in that, comprise step:
A () calculates the initial bright chroma correction coefficient average in region to be corrected;
B () controls described region to be corrected and observes first of reference zone display same color to correct picture for eye-observation;
Multiple component values in c color model that () response inputs because correcting picture to described first of described region to be corrected display and carrying out component adjustment operation, calculate bright chroma correction coefficient average after the correction in described region to be corrected;
D () utilizes described initial bright chroma correction coefficient average and described correction after, bright chroma correction coefficient mean value computation goes out to regulate matrix;
E described adjustment matrix is acted on multiple LED pixel in described region to be corrected and bright chroma correction coefficient after obtaining the correction in described region to be corrected by ().
2. as claimed in claim 1 based on the LED display bright chroma bearing calibration of human eye vision, it is characterized in that, described first correction picture is sprite.
3., as claimed in claim 2 based on the LED display bright chroma bearing calibration of human eye vision, it is characterized in that, described sprite is selected from redness, green, one of blueness and white picture.
4., as claimed in claim 1 based on the LED display bright chroma bearing calibration of human eye vision, it is characterized in that, described region to be corrected and described observation reference zone are the adjacent area of same LED display.
5., as claimed in claim 1 based on the LED display bright chroma bearing calibration of human eye vision, it is characterized in that, also comprise step:
Change described region to be corrected and observe reference zone display described first that to correct picture be that display second corrects picture for eye-observation and bright chroma correction coefficient average after described correction is set to described initial bright chroma correction coefficient average, and again perform step (c) to (e); Wherein said second color correcting picture is different from the color that described first corrects picture.
6., as claimed in claim 1 based on the LED display bright chroma bearing calibration of human eye vision, it is characterized in that, described step (c) comprising:
Respond the multiple component values in the color model inputted because of component adjustment operation, multiple component values of described input are converted to the RGB component value in RGB color model; And
Bright chroma correction coefficient average after the correction in described region to be corrected is calculated according to the RGB component value be converted to.
7., based on a LED display bright chroma corrective system for human eye vision, it is characterized in that, comprising:
Initial bright chroma correction coefficient average acquisition module, for obtaining the initial bright chroma correction coefficient average in region to be corrected;
Correct picture display control module, for controlling the correction picture of described region to be corrected and observation reference zone display same color;
Bright chroma correction coefficient mean value computation module after revising, for responding the multiple component values in the color model that inputs because carrying out component adjustment operation to the described correction picture of described region to be corrected display, calculate bright chroma correction coefficient average after the correction in described region to be corrected; And
Regulate matrix computations module, go out to regulate matrix for bright chroma correction coefficient mean value computation after utilizing described initial bright chroma correction coefficient average and described correction, for acting on multiple LED pixel in described region to be corrected and bright chroma correction coefficient after obtaining the correction in described region to be corrected.
8., as claimed in claim 7 based on the LED display bright chroma corrective system of human eye vision, it is characterized in that, after described correction, bright chroma correction coefficient mean value computation module comprises:
Component transform subblock, for responding the multiple component values in the color model that inputs because carrying out component adjustment operation to the described correction picture of described region to be corrected display, multiple component values of described input are converted to the RGB component value in RGB color model;
Mean value computation submodule, for calculating bright chroma correction coefficient average after the correction in described region to be corrected according to the RGB component value that is converted to.
9. as claimed in claim 7 based on the LED display bright chroma corrective system of human eye vision, it is characterized in that, described region to be corrected and observation reference zone are the adjacent area of same LED display.
10., as claimed in claim 7 based on the LED display bright chroma corrective system of human eye vision, it is characterized in that, described correction picture is sprite, and described sprite is selected from redness, green, one of blueness and white picture.
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