CN104167176B - A kind of LED box color adjustment method based on camera shooting and device - Google Patents

Abstract

The present invention discloses a kind of LED box color adjustment method based on camera shooting and device, method includes that factory corrects: light LED box, treat that LED screen body operating temperature is stable, LED box is made to shoot successively when showing R, G, B picture respectively, the data of shooting are sent to data processor, the original rgb value of the three kinds of colors collected is analyzed, obtains the rgb value of LED point each color, using the RGB minima in each color as the RGB desired value of color；The rgb value of the RGB desired value of each color with the respective color of each LED point is divided by, is compensated coefficient, penalty coefficient is issued LED reception card and carries out factory's correction；Straightened up in place: call factory's timing shooting initial data, the original rgb value of three kinds of colors is carried out viewing angle compensation, again adds up desired value, and calculate new penalty coefficient, new penalty coefficient is handed down to LED reception card and carries out straightened up in place.

Description

A kind of LED box color adjustment method based on camera shooting and device

Technical field

The present invention relates to LED field, more particularly, to a kind of LED box color based on camera shooting Adjustment method and device.

Background technology

LED dot matrix display screen, because its brightness is high, operating power consumption is little, life-span length, steady performance, is subject to To extensively paying attention to, and developed rapidly, be widely used in outside stadiums, bank, Zheng Deng different chamber, The advertising in indoor place.

LED display can carry out factory's correction to LED box, in so can ensure that casing before dispatching from the factory LED color concordance is uniform, spells wall for bigger LED, it is impossible to ensure the face between casing and casing Color concordance, this is accomplished by the correction again carrying out between casing to factory's calibration result at the scene, although than straight Tap into row straightened up in place and decrease certain workload, operating procedure or some is loaded down with trivial details.

Summary of the invention

The present invention is to overcome at least one defect (not enough) described in above-mentioned prior art, first proposes a kind of high The LED box color adjustment method based on camera shooting of efficiency, combines plant data with site environment, Effectively make use of plant data resource, shorten the LED box straightened up in place time, improve straightened up in place The work efficiency of personnel.

A further object of the present invention is to propose a kind of LED box color debugging apparatus based on camera shooting.

It is contemplated that solve above-mentioned technical problem the most to a certain extent.

For solving above-mentioned technical problem, technical scheme is as follows:

A kind of LED box color adjustment method based on camera shooting, including:

Factory corrects: LED box is carried out factory's Concordance, lights LED box, treat LED screen Body running temperature stabilization, while making LED box show R, G, B picture respectively, uses camera to clap successively Take the photograph, and the data that photograph are sent to data processor, the data processor three kinds of colors to collecting former Beginning rgb value carries out mathematical statistics analysis, obtains the rgb value of each LED point each color, and by every kind of face RGB minima in color is as the RGB desired value of this color；

The rgb value of the RGB desired value of each color with the respective color of each LED point is divided by, obtains each The penalty coefficient of LED point each color, is handed down to above-mentioned penalty coefficient LED reception card and completes to carry out factory Correction；

Straightened up in place: call factory timing shooting initial data, and original to tri-kinds of colors of R, G, B Rgb value carries out viewing angle compensation, the most again adds up desired value, and calculates new penalty coefficient, by new benefit Repay coefficient to be handed down to LED reception card and complete to carry out straightened up in place.

Factory's timing, lights LED box and can proceed by the collection of data after about 20 minutes, now Screen body running temperature stabilization, does not interferes with calibration result.

Owing to having been carried out the raw data acquisition of different casing at factory's timing, so school at the scene Timing then need not re-shoot screen body, it is only necessary to calls factory's shooting initial data, and carries out initial data Viewing angle compensation, the most again adds up desired value, and calculates new penalty coefficient.

A kind of LED box color debugging apparatus based on camera shooting, including:

Factory's correction module: for LED box is carried out factory's Concordance, light LED box, treat LED screen body operating temperature is stable, while making LED box show R, G, B picture respectively, uses phase Machine shoots successively, and sends the data that photograph to data processor, to collecting three kinds of data processor The original rgb value of color carries out mathematical statistics analysis, obtains the rgb value of each LED point each color, and Using the RGB minima in each color as the RGB desired value of this color；

The rgb value of the RGB desired value of each color with the respective color of each LED point is divided by, obtains each The penalty coefficient of LED point each color, is handed down to above-mentioned penalty coefficient LED reception card and completes to carry out factory Correction；

Straightened up in place module: call factory's timing shooting initial data, and to tri-kinds of colors of R, G, B Original rgb value carries out viewing angle compensation, the most again adds up desired value, and calculates new penalty coefficient, will be new Penalty coefficient be handed down to LED reception card and complete to carry out straightened up in place.

Compared with prior art, the present invention is effectively utilized LED factory based on camera colour consistency correction Data, spell wall actual size in conjunction with curstomer's site, and the LED pointwise data gathering factory carry out perspective correction, Eliminate the on-the-spot Resurvey screen body initial data time, be greatly improved the work efficiency of engineering staff.

Accompanying drawing explanation

Fig. 1 is that factory corrects color management method flow chart.

Fig. 2 is initial data scene angle of visual field correction schematic diagram.

Detailed description of the invention

With embodiment, technical scheme is described further below in conjunction with the accompanying drawings.

Embodiment 1

A kind of LED box color adjustment method based on camera shooting, including:

1, in factory, the LED factory correction of colour consistency correction is completed for each casing of LED；Its The process that mainly realizes is:

(1) light LED box about 20 minutes, make screen body running temperature stabilization, be unlikely to impact correction effect Really；

(2) while casing shows R, G, B picture respectively, camera shoots successively, and the data that will photograph Pass to control PC；

(3) the original rgb value controlling the PC three kinds of colors to collecting carries out mathematical statistics analysis, finds case All LED points the most attainable target rgb value in body, rgb value minimum in the data i.e. collected. Now it is noted that the rejecting of bad point, in the present embodiment, the mode rejecting bad point is: collect in statistics casing The meansigma methods of original RGB, rgb value is set as bad point, not at mesh less than the LED point of average 30% In the range of scale value is selected；

(4) penalty coefficient calculates: by the respective color of the RGB desired value of each color and each LED Rgb value is divided by, and i.e. can get the penalty coefficient of each LED point each color；Note, the compensation system of bad point Number can indirect assignment be 1.

(5) above-mentioned penalty coefficient is handed down to LED reception card.

So, factory's casing LED Concordance is just completed.

2, data storage: camera shooting the original rgb value of tri-kinds of colors of R, G, B, correction target value, The penalty coefficient of each LED point.These three data, can deposit according to the design specification of respective LED manufacturer Storage is in respective self-defining space.In such as receiving card FLASH etc..

3, LED straightened up in place

LED factory timing is carried out for LED box, and each casing is all in the normal side of shooting camera To, at actual curstomer's site, and not all casing is all in the normal direction of observer's direction of observation, owing to regarding Angle and factory's timing each casing different target value difference the opposite sex, cause factory correction after LED box it Between also can there is color discordance；Casing corrected to factory is thus needed to re-calibrate.

Owing to having carried out the raw data acquisition of different casing in factory, so need not at the scene again clap Take the photograph screen body, it is only necessary to call factory's shooting initial data, and initial data is carried out viewing angle compensation, the most again Statistics desired value, and calculate new penalty coefficient.Concrete operation step is as follows:

(1) lighting curstomer's site LED and spell wall, observer stands in LED and spells wall centre normal position, observes and spells Wall color is the most consistent.If consistent, then it is left intact, if i.e. LED spelling wall is smaller, through work Factory-run school just after LED box colour consistency preferable, the most then need not recalculate on-the-spot color compensating system Number.If it is inconsistent, do following process:

(2) call the original rgb value of tri-kinds of colors of R, G, B of each casing, and according to the discharge of casing Order is reformulated LED and is spelled the rgb value of three kinds of colors of wall；

To above-mentioned call original rgb value carry out angle modification, referring specifically to accompanying drawing 2, computing formula As follows:

If L is the distance between LED screen body normal direction and observer, i.e. with reference between casing and observer Distance, r is the length of side of LED box, the ranks number of casing be (m, n).Then:

Line number a=int (m/2+0.5) with reference to casing；

Columns b=int (n/2+0.5) with reference to casing.

That is, the ranks number with reference to casing is that whole screen casing ranks number rounds after 2.

I-th row jth row casing with the distance with reference to casing center is:

Illustrating as a example by R in R color, the original value processing method of other colors is identical, does not states tired.

If the R pixel original value in the i-th red arbitrarily LED point red R of row jth row casing is Y, then Pixel value after correction is:

Y '=sin θ Y, wherein $\sin \mathrm{\θ}=\frac{L}{\sqrt{L^2+l^2}}$

The processing method of other colored pixels original values is identical.

(4) revised three kinds of colors of whole screen are recalculated desired value according to LED factory correction module method And penalty coefficient.

(5) the above-mentioned penalty coefficient recalculated is handed down to LED reception card.

The corresponding same or analogous parts of same or analogous label；

Described in accompanying drawing, position relationship is used for the explanation of being merely cited for property, it is impossible to be interpreted as the limit to this patent System；

Obviously, the above embodiment of the present invention is only for clearly demonstrating example of the present invention, and not It it is the restriction to embodiments of the present invention.For those of ordinary skill in the field, in described above On the basis of can also make other changes in different forms.Here without also cannot be to all of enforcement Mode gives exhaustive.All any amendment, equivalent and improvement made within the spirit and principles in the present invention Deng, within should be included in the protection domain of the claims in the present invention.

Claims (4)

1. a LED box color adjustment method based on camera shooting, it is characterised in that including:

Factory corrects: LED box is carried out factory's Concordance, lights LED box, treat LED screen Body running temperature stabilization, while making LED box show R, G, B picture respectively, uses camera to clap successively Take the photograph, and the data that photograph are sent to data processor, the data processor three kinds of colors to collecting former Beginning rgb value carries out mathematical statistics analysis, obtains the rgb value of each LED point each color, and by every kind of face RGB minima in color is as the RGB desired value of this color；

The rgb value of the RGB desired value of each color with the respective color of each LED point is divided by, obtains each The penalty coefficient of LED point each color, is handed down to above-mentioned penalty coefficient LED reception card and completes to carry out factory Correction；

Straightened up in place: call factory timing shooting initial data, and original to tri-kinds of colors of R, G, B Rgb value carries out viewing angle compensation, the most again adds up desired value, and calculates new penalty coefficient, by new benefit Repay coefficient to be handed down to LED reception card and complete to carry out straightened up in place；

First putting bright field LED before straightened up in place and spell wall, observer stands in LED and spells wall centre normal position, sees Examine spelling wall color the most consistent, if unanimously, then terminate；Carry out existing if it is inconsistent, LED to be spelled wall Field correction；

Call the original rgb value of tri-kinds of colors of R, G, B of each LED box of factory's timing, and according to The discharge order of casing is reformulated LED and is spelled the rgb value of three kinds of colors of wall；To tri-kinds of colors of R, G, B Original rgb value carry out the detailed process of viewing angle compensation and be:

If L is the distance between LED screen body normal direction and observer, i.e. with reference between casing and observer Distance, r is the length of side of LED box, the ranks number of LED box be (m, n)；Then:

Line number a=int (m/2+0.5) with reference to casing；

Columns b=int (n/2+0.5) with reference to casing；

I-th row jth row casing with the distance with reference to casing center is:

If the pixel original value of i-th row jth row casing any LED point is Y, then the pixel value after correction is: Y '=sin θ Y, wherein

LED box color adjustment method based on camera shooting the most according to claim 1, its feature Being, also including when obtaining the rgb value of each LED point each color rejecting LED bad point, wherein LED is bad The penalty coefficient of point is set to 1.

LED box color adjustment method based on camera shooting the most according to claim 2, its feature Being, described LED bad point refers to the meansigma methods of the rgb value of this LED point original RGB less than 30%.

4. a LED box color debugging apparatus based on camera shooting, it is characterised in that including:

Factory's correction module: for LED box is carried out factory's Concordance, light LED box, treat LED screen body operating temperature is stable, while making LED box show R, G, B picture respectively, uses phase Machine shoots successively, and sends the data that photograph to data processor, to collecting three kinds of data processor The original rgb value of color carries out mathematical statistics analysis, obtains the rgb value of each LED point each color, and Using the RGB minima in each color as the RGB desired value of this color；

The rgb value of the RGB desired value of each color with the respective color of each LED point is divided by, obtains each The penalty coefficient of LED point each color, is handed down to above-mentioned penalty coefficient LED reception card and completes to carry out factory Correction；

Straightened up in place module: call factory's timing shooting initial data, and to tri-kinds of colors of R, G, B Original rgb value carries out viewing angle compensation, the most again adds up desired value, and calculates new penalty coefficient, will be new Penalty coefficient be handed down to LED reception card and complete to carry out straightened up in place；

First putting bright field LED before straightened up in place and spell wall, observer stands in LED and spells wall centre normal position, sees Examine spelling wall color the most consistent, if unanimously, then terminate；Carry out existing if it is inconsistent, LED to be spelled wall Field correction；

Call the original rgb value of tri-kinds of colors of R, G, B of each LED box of factory's timing, and according to The discharge order of casing is reformulated LED and is spelled the rgb value of three kinds of colors of wall；To tri-kinds of colors of R, G, B Original rgb value carry out the detailed process of viewing angle compensation and be:

If L is the distance between LED screen body normal direction and observer, i.e. with reference between casing and observer Distance, r is the length of side of LED box, the ranks number of LED box be (m, n)；Then:

Line number a=int (m/2+0.5) with reference to casing；

Columns b=int (n/2+0.5) with reference to casing；

I-th row jth row casing with the distance with reference to casing center is:

If the pixel original value of i-th row jth row casing any LED point is Y, then the pixel value after correction is: Y '=sin θ Y, wherein