CN105185302B - Lamp position deviation modification method and its application between monochrome image - Google Patents
Lamp position deviation modification method and its application between monochrome image Download PDFInfo
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- CN105185302B CN105185302B CN201510541813.6A CN201510541813A CN105185302B CN 105185302 B CN105185302 B CN 105185302B CN 201510541813 A CN201510541813 A CN 201510541813A CN 105185302 B CN105185302 B CN 105185302B
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Abstract
The present invention relates to lamp position deviation modification method between a kind of monochrome image.The present invention is between the monochrome image that is likely to occur in big visual angle dot interlace gatherer process at present the problem of lamp space of points position deviation, using a certain monochrome image in monochrome image of multiple collected with color as referring to monochrome image, and the centre coordinate collection value with reference to the multiple lamp points oriented in monochrome image is entered into portable lighter position deviation amendment as benchmark to other remaining monochrome images, it can reduce or eliminate because of camera shake, camera or screen body block, lamp position deviation between image caused by non-static ambient light interference etc., it is and big using the camera fields of view of big visual angle acquisition correction, it can avoid frequently moving camera angle lenses, and then save a large amount of correction times.In addition, the invention also provides the bright concealed wire of display screen of lamp position deviation modification method between the application monochrome image determines method and uniformity correcting method.
Description
Technical field
The present invention relates to display technology field, between more particularly to a kind of monochrome image lamp position deviation modification method and its
Using.
Background technology
In recent years, the development of domestic and international LED display manufacturing gradually tended to small spacing, super large resolution ratio, more
Batch, these development trends also directly determine that LED display correction industry will make corresponding adjustment, and common multiple batches of
Lamp point blending, lamp plate module blending, casing blending etc. are all correction traditional problem to be solved all the time, then small spacing
Change, super large resolution ratioization also just becomes the new challenge of correction.So-called small spacing refers to less LED point spacing, such as
P1.5 (pel spacing 1.5mm), P2 (pel spacing 2mm) etc..LED spacing, which constantly reduces, means that LED display will be by open air
Come into it is indoor, be changed into by remote viewing and closely watched, LED spacing, which reduces, in addition also causes casing physical size to reduce,
The resolution ratio of so one piece identical size display screen will also greatly improve, such as current 2K, 4K resolution ratio display screen on the market.
LED display correction industry is faced with the challenge impact of small spacing, super large resolution ratio, yet with image
The limitation of the ccd sensor number of collecting device such as camera, will accurately measure all LEDs of display screen and light chromatic value and also cause
Camera single acquisition screen body resolution ratio is restricted, then super large resolution ratio display screen just needs many subregions to be corrected, most
Eliminate the border-differential of all by stages again afterwards.Although this way is feasible, trimming process is time-consuming too long, for super large point
The correction of resolution display screen even needs to take hours the time, and this allows people to be difficult to receive.Therefore, go out in recent years in industry
A kind of new acquisition correction mode, that is, big visual angle dot interlace acquisition mode are showed, have been illustrated in fig. 1 shown below.
Whole LED display is exactly divided into many size identical cell (such as Fig. 1 by big visual angle dot interlace acquisition mode
3*3 LED pixel in rectangular broken line frame), then in each collecting unit lattice same position single led pixel, then just
Needing shooting unit table rows number to be multiplied by cell columns pair picture, (9 is secondary, and first secondary and the second secondary picture conduct is only shown in Fig. 1
Signal) complete whole all LED of display screen bright chroma collecting work.This mode advantage is camera measurement work visual angle
Greatly, camera angle lenses need not be frequently moved in trimming process, save a large amount of correction times, are also adopted just because of big visual angle dot interlace
These outstanding advantages of mode set, so being likely to turn into main flow correction acquisition mode from now on；Big visual angle dot interlace acquisition mode can
The Application No. 201310362893.X with reference to filed in Xi'an Novastar Electronic Technology Co., Ltd. in August in 2013 19 days, invention
The application for a patent for invention of entitled " the correction image-pickup method and display methods of LED display ", the content disclosed by it
This is incorporated in as reference.
However, this mode needs to merge after the completion of all monochrome image LED light tones angle value, the collection of lamp point coordinates, this
There may be certain risk, i.e., because shake occurs for camera individual images lamp space of points position be occurred in gatherer process
Deviation, in addition camera or screen body block, non-static ambient light interference etc. it is also possible that the survey of individual images lamp point bright chroma
Overall difference be present in value.
The content of the invention
Therefore, based on big visual angle dot interlace acquisition mode in the prior art the defects of, the present invention are proposed between a kind of monochrome image
Lamp position deviation modification method and its application, can solve the problem that to a certain extent due to monochrome image caused by camera shake
Between lamp space of points position deviation problem so that big visual angle dot interlace acquisition mode is more efficient, is more accurately applied to display screen
In homogeneity correction.
Specifically, lamp position deviation modification method between a kind of monochrome image that the embodiment of the present invention proposes, including step：
(a) multiple display pictures of display screen target area are sequentially gathered accordingly to obtain multiple monochrome images with color, its
Described in display screen target area include the cells of multiple repeated arrangements along the line of the column direction, each described cell includes more
Individual LED pixel point, each described display picture are that one that same position is in the multiple cell is lighted by control
A kind of color LED point of LED pixel point and obtain and the multiple display picture corresponds in the multiple cell respectively
LED pixel point in diverse location；(b) it is monochromatic to obtain each Zhang Suoshu that multiple described monochrome images are carried out with image procossing
The centre coordinate collection value for the multiple lamp points oriented in image；(c) achromatic map in multiple described monochrome images is chosen
As with reference to monochrome image and calculate in multiple described monochrome images except it is described with reference to monochrome image in addition to all remaining lists
The centre coordinate correction value for the multiple lamp point oriented in color image, wherein, it is fixed in each remaining monochrome image to calculate
The centre coordinate correction value for the multiple lamp point that position goes out includes sub-step：(c1) oriented using described refer in monochrome image
The centre coordinate collection value of the multiple lamp point, the LED pixel point in the display picture with reference to corresponding to monochrome image
Position of the LED pixel point in the display picture corresponding to position, the remaining monochrome image in cell in cell
Put and obtain the centre coordinate desired value of the multiple lamp point oriented in the remaining monochrome image with the size of cell；With
And (c2) utilizes the centre coordinate collection value and centre coordinate mesh of the multiple lamp point oriented in the remaining monochrome image
Scale value obtains the centre coordinate correction value for the multiple lamp point oriented in the remaining monochrome image；And (d) merges institute
State and positioned with reference in the centre coordinate collection value for the multiple lamp point oriented in monochrome image and all remaining monochrome images
Overall center with color lamp point of the centre coordinate correction value of the multiple lamp point gone out as the display screen target area
Coordinate data.
In one embodiment of the invention, in above-mentioned steps (a) it is described multiple with the monochrome image of color be multiple
Red image, multiple green images or multiple blue images.
In one embodiment of the invention, above-mentioned steps (b) obtain using grey scale centre of gravity method or ellipse fitting method
The centre coordinate collection value for the multiple lamp point oriented in each Zhang Suoshu monochrome images.
In one embodiment of the invention, the reference monochrome image in above-mentioned steps (c) is to be gathered in step (a)
First obtained monochrome image.
In one embodiment of the invention, above-mentioned sub-step (c2) includes：It is more using the fitting based on least square method
Item formula equation constructs the first plan by the centre coordinate collection value for the multiple lamp point oriented in the remaining monochrome image
Close matrix；The second plan is constructed using the centre coordinate desired value for the multiple lamp point oriented in the remaining monochrome image
Close fitting result of the matrix as the polynomial fitting equation；Utilize first fit metric and second fit metric
Calculate fitting coefficient matrix；And the fitting coefficient matrix is substituted into the polynomial fitting equation to calculate described remain
The centre coordinate correction value for the multiple lamp point oriented in remaining monochrome image.
In another embodiment of the present invention, above-mentioned sub-step (c2) includes：It is fixed in the remaining monochrome image to calculate
The centre coordinate collection value of the multiple lamp point and the deviation average of centre coordinate desired value that position goes out；And by the residue
The centre coordinate collection value for the multiple lamp point oriented in monochrome image subtracts the deviation average and obtained described
The centre coordinate correction value for the multiple lamp point oriented in remaining monochrome image.
In one embodiment of the invention, above-mentioned display screen target area for LED display overall viewing area or
Partial display area.
In addition, the bright concealed wire of a kind of display screen that the embodiment of the present invention proposes determines method, including step：Using foregoing any
Lamp position deviation modification method obtains the same face of entirety of the corresponding display screen target area between a kind of described monochrome image
The centre coordinate data of colored lights point；The luminous effective area of each lamp point in the centre coordinate data is calculated, wherein often
The luminous effective area of one lamp point is equal to the centre coordinate value of the lamp point to the centre coordinate of multiple lamp points adjacent thereto
The area of the polygon surrounded apart from the perpendicular bisector of line of value；It is and each in the centre coordinate data
The size distribution of the luminous effective area of individual lamp point determines the bright concealed wire position in the display screen target area.
Furthermore a kind of display screen uniformity correcting method that the embodiment of the present invention proposes, including step：Using foregoing any
Lamp position deviation modification method obtains the same face of entirety of the corresponding display screen target area between a kind of described monochrome image
The centre coordinate data of colored lights point；The luminous effective area of each lamp point in the centre coordinate data is calculated, wherein often
The luminous effective area of one lamp point is equal to the centre coordinate value of the lamp point to the centre coordinate of multiple lamp points adjacent thereto
The area of the polygon surrounded apart from the perpendicular bisector of line of value；Obtain what is oriented in each Zhang Suoshu monochrome images
The relatively bright angle value of each lamp point in the multiple lamp point；Based on the relatively bright angle value of each lamp point and the hair
Brightness value after the Area Compensation of each lamp point is calculated in light effective area；And mended according to the area of each lamp point
Repay the difference between rear brightness value and gamma correction desired value obtain corresponding to the lamp point in the display screen target area
The brightness correction coefficients of interior physical lamp point.
In addition, another display screen uniformity correcting method that the embodiment of the present invention proposes, including step：Utilize foregoing
Lamp position deviation modification method between a kind of described monochrome image of anticipating obtains the overall same of the corresponding display screen target area
The centre coordinate data of color lamp point；The luminous effective area of each lamp point in the centre coordinate data is calculated, wherein
Centre coordinate value to the center of multiple lamp points adjacent thereto that the luminous effective area of each lamp point is equal to the lamp point is sat
The area of the polygon surrounded apart from the perpendicular bisector of line of scale value；Obtain and oriented in each Zhang Suoshu monochrome images
The multiple lamp point in the relatively bright angle value of each lamp point and described more by what is oriented in multiple described monochrome images
The relatively bright angle value of individual lamp point is normalized to obtain the normalization brightness value of each lamp point；Based on every
The normalization brightness value and the luminous effective area of one lamp point are calculated bright after the Area Compensation of each lamp point
Angle value；And institute is obtained according to the difference after the Area Compensation of each lamp point between brightness value and gamma correction desired value
State the brightness correction coefficients of the physical lamp point in the display screen target area corresponding to lamp point.
From the foregoing, it will be observed that the embodiment of the present invention is directed between the monochrome image being likely to occur in big visual angle dot interlace gatherer process at present
The problem of lamp space of points position deviation, using a certain monochrome image in monochrome image of multiple collected with color as ginseng
Examine monochrome image and remain the centre coordinate collection value with reference to the multiple lamp points oriented in monochrome image to other as benchmark
Remaining monochrome image enters portable lighter position deviation amendment, and it may achieve following one or more beneficial effects：I) reduce or eliminate because
Camera shake, camera or screen body block, the lamp position deviation between image caused by non-static ambient light interference etc.；And
Ii it is) big using the camera fields of view of big visual angle acquisition correction, it can avoid frequently moving camera angle lenses, so as to save a large amount of corrections
Time.
By the detailed description below with reference to accompanying drawing, other side of the invention and feature become obvious.But it should know
Road, the accompanying drawing is only the purpose design explained, not as the restriction of the scope of the present invention, because it should refer to
Appended claims.It should also be noted that unless otherwise noted, it is not necessary to which scale accompanying drawing, they only try hard to concept
Ground illustrates structure and flow described herein.
Brief description of the drawings
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail.
Fig. 1 is big visual angle dot interlace acquisition mode schematic diagram.
Fig. 2 is the zone location and point location result schematic diagram being relevant in the image procossing of the embodiment of the present invention.
Embodiment
In order to facilitate the understanding of the purposes, features and advantages of the present invention, below in conjunction with the accompanying drawings to the present invention
Embodiment be described in detail.
Specifically, lamp position deviation modification method is for example by following between a kind of monochrome image that the embodiment of the present invention proposes
Step (1), (2) and (3) is realized：
Step (1)：List is obtained by the display picture of image capture device such as camera collection display screen target area
Color image group, in order to subsequently calculate the centre coordinate for each lamp point oriented in each monochrome image of monochrome image group
Collection value.Specifically, so that RGB full-color LED display screens and cell size are 3*3 as an example, display screen target is gathered by camera
The display picture in region can obtain three monochrome image groups such as red image group, green image group and blue image group, each
Monochrome image group has nine monochrome images；It can be the whole viewing area of LED display as display screen target area, also may be used
To be the partial display area of LED display；And the display picture of display screen target area can be according to Xi'an Nova electronic section
Skill Co., Ltd in Application No. 201310362893.X filed in August in 2013 19 days, it is entitled " LED display
The dot interlace shown in Fig. 3 in the Figure of description of the application for a patent for invention of correction image-pickup method and display methods " plays screen
Mode obtains, and is also to collect each monochrome image group, it is sequentially to light to weigh along the line of the column direction that dot interlace, which beats screen mode,
Multiple bank row multiple cells in each cell in pixel [1,1], [1,2], [1,3], [2,1], [2,2], [2,
3], the same color lamp point in [3,1], [3,2], [3,3] is so as to obtaining the secondary red picture of nine secondary sprite such as nine altogether, nine
Secondary green picture or nine secondary blue pictures, correspondingly, the picture numbers of nine monochrome images collected are sequentially 1-9；This
Locate so-called sprite to refer to a kind of face of a pixel of the same position in each cell in target area
Picture obtained from color physical lamp point (such as red colored lamp point, green light point or blue lamp point) is lighted by control.It is worth mentioning
, the size of cell is typically to be set by the pixel quantity (or physical resolution) and IMAQ of display screen target area
Standby resolution ratio determines.
After required monochrome image group is obtained, zone location and point location are carried out to every monochrome image (such as Fig. 2 institutes
Show) and calculate the centre coordinate (or centre coordinate collection value) for each lamp point that point location goes out；Herein, zone location and point
The mature technology being positioned as in image procossing, will not be repeated here.Centre coordinate computational methods as lamp point can be gray scale
Gravity model appoach, such as Xian Electronics Science and Technology University and Xi'an Novastar Electronic Technology Co., Ltd. were on 01 24th, 2014 joint applications
Application No. 201410034968.6, the invention of entitled " brightness correcting method and device of LED display " is special
The disclosed grey scale centre of gravity method of profit application, the full content disclosed by it is incorporated in this as reference, in the application for a patent for invention
In, the centre coordinate of the grey scale centre of gravity coordinate of each lamp point that point location is gone out as each lamp point；Certainly, the center of lamp point is sat
Mark computational methods can also use other algorithms, such as ellipse fitting method, and it passes through the border of each lamp point gone out to point location
Elliptical center is obtained after carrying out ellipse fitting, afterwards the centre coordinate using obtained elliptical center coordinate as corresponding lamp point.
Certainly, in order to be prepared to follow-up gamma correction, each achromatic map can be also further calculated after point location
The relatively bright angle value for each lamp point oriented as in, it is specially：
The lamp gone out using each point location select corresponding to the G component sums of image slices vegetarian refreshments calculate the relative of the lamp point
Brightness collection value, specific formula for calculation are：Li=Gi×L/Gaver, wherein, LiFor the relative luminance collection value of lamp point, GiFor lamp point
G component values (namely G component values sum of corresponding image slices vegetarian refreshments), L be global brightness value and its can be default value
(be usually empirical value) or using colorimeter collection value (such as all same color lamp points in display screen target area light when gather
Brightness value), GaverFor the average value for the G component values of all lamp points oriented in this monochrome image, i is the sequence of lamp point
Number.It is understood that red (R), green (G), blue (B) lamp point are not limited to calculate relatively bright angle value using its G component,
Relative luminance collection value can also be calculated using its R component, the linear combination value of tri- components of B component or RGB；Simply test
It was found that the G components for the RGB three-color LED lights point that usual camera collects are relatively accurate, therefore it is preferably to select G components to calculate
Relative luminance collection value.
If in addition, subsequently need into line brightness/chrominance correction rather than simple gamma correction, each lamp that point location goes out
The relative chromatic value of point can directly be set to default value or gather all same color lamp point points in display screen target area by colorimeter
Colourity when bright is worth to, and the setting means of this kind of relative chromatic value is mainly applied in LED display between multiple casings
The preferable situation of bright chroma uniformity.Here, the lamp point gone out for each point location, the assignment mode of its relative chromatic value can
To be：
xi=x；yi=y
Wherein, (xi,yi) be each lamp point chromaticity coordinates, (x, y) is acquiescence chromaticity coordinates or the color that collects of colorimeter
Coordinate, i are lamp point sequence number.
If in addition, it is due to camera or display screen body is blocked, the reason such as non-static ambient light interference causes achromatic map
Lamp as between lights chromatic value and overall difference be present, then can pass through the relatively bright chromatic value solution of all monochrome images of normalized
Certainly, such as the relative luminance collection value of each monochrome image is normalized into fixed value 1000 (colourity is similarly) to be calculated as follows
Formula：
Li'=Li×1000/Laver
Wherein, LiFor the relative luminance collection value of i-th of lamp point, LaverIt is relative for all lamp points in same monochrome image
The average value of brightness collection value, Li' for the normalization brightness value of i-th lamp point, i is lamp point sequence number；
Step (2)：A monochrome image is chosen from monochrome image group to be used as with reference to monochrome image and calculate monochrome image
The centre coordinate correction value for each lamp point oriented in other remaining monochrome images in group in addition to reference to monochrome image.
For each monochrome image group, such as with first monochrome image (corresponding unit in monochrome image group
A certain color lamp point in lattice in pixel [1,1] is lighted by controlling) in the centre coordinate of each lamp point oriented gather
On the basis of value (namely first monochrome image is described herein by reference monochrome image), calculate its follow-up each monochrome image (
I.e. remaining monochrome image) in the centre coordinate correction value of each lamp point oriented, it is specific as follows：
First, according to current monochrome image sequence number (namely the position of corresponding pixel in cell), cell
Centre coordinate collection value of each lamp point oriented in size, first monochrome image etc. calculates fixed in current monochrome image
The centre coordinate desired value Targets for each lamp point that position goes out, such as cell size are 3*3, current monochrome image serial number 2
(namely each lamp point oriented in current monochrome image corresponds to the pixel [1,2] in 3*3 cells), in conjunction with first
The centre coordinate collection value for each lamp point oriented in monochrome image (referring to monochrome image) calculates the adjacent lamps point side of being expert at
To with the spacing on column direction, and then the centre coordinate desired value for each lamp point oriented in current monochrome image is calculated
Targets。
Herein, for first monochrome image (picture numbers 1), because cell size is 3*3, line direction and
Two neighboring lamp point on column direction distinguish corresponding to it is homogeneous between two physical picture element points in display screen target area
Every two physical picture element points, it is assumed that respective pixel in two neighboring cell U1 on the line direction of display screen target area, U2
[1,1] on first monochrome image respectively corresponding between two neighboring lamp point spacing (namely centre coordinate collection value it
Between line direction range difference) for a (referring to Fig. 2), in two neighboring cell U1 on the column direction of display screen target area, U3 each
Pixel [1,1] on first monochrome image respectively corresponding to spacing (namely centre coordinate between two neighboring lamp point
Column direction range difference between collection value) it is the pixel [1,1] in b (referring to Fig. 2) and cell U1 in first achromatic map
As the centre coordinate collection value of upper corresponding lamp point is (x1, y1), then the pixel in cell U1 [1,2] is in second monochrome
The centre coordinate desired value of corresponding lamp point is (x1+a/3, y1) on image (picture numbers 2), the pixel in cell U1
[1,3] centre coordinate desired value of corresponding lamp point on the 3rd monochrome image (picture numbers 3) is (x1+2a/3, y1),
The centre coordinate mesh of pixel [2,1] corresponding lamp point on the 4th monochrome image (picture numbers 4) in cell U1
Scale value is (x1, y1+b/3), by that analogy, namely based on the monochrome image corresponding to the pixel [1,1] in cell U1
Lamp point centre coordinate collection value can calculate pixel [1,2] in cell U1, [1,3], [2,1], [2,2], [2,3],
[3,1], [3,2], [3,3] distinguish corresponding to lamp point on monochrome image centre coordinate desired value.In other cells
Pixel [1,2], [1,3], [2,1], [2,2], [2,3], [3,1], [3,2], [3,3] distinguish corresponding on monochrome image
The computational methods of the centre coordinate desired value of lamp point refer to cell U1, therefore repeat no more.
Afterwards, according to the centre coordinate desired value Targets for each lamp point oriented in current monochrome image and currently
The centre coordinate collection value Originals for each lamp point oriented in monochrome image (namely passes through gray scale after foregoing point location
The centre coordinate value for the lamp point that gravity model appoach, ellipse fitting method etc. are calculated), utilize the fitting of a polynomial based on least square method
Method calculates the centre coordinate correction value Facts for each lamp point oriented in current monochrome image, and process is calculated as below：
Polynomial fitting method based on least square method, as cubic fit polynomial equation is：
F (x, y)=c1+c2x+c3y+c4xy+c5x2+c6y2+c7xy2+c8x2y+c9x3+c10y3
First, constructed using the centre coordinate collection value Originals for each lamp point oriented in current monochrome image
Go out to be fitted B matrixes such as following formula：
Wherein, (xn,yn) for n-th of lamp point in the centre coordinate collection value Originals of each lamp point that orients
Centre coordinate collection value；
Then, constructed using the centre coordinate desired value Targets for each lamp point oriented in current monochrome image
It is fitted fitting result of the Z matrixes as cubic fit polynomial equation, such as following formula：
Wherein, (x 'n,y′n) for n-th of lamp point in the centre coordinate desired value Targets of each lamp point that orients
Centre coordinate desired value；
Then, fitting coefficient C matrixes are gone out according to fitting Z matrixes and fitting B matrix computations：
C=[BTB]-1[BTZ]
Wherein, BTTo be fitted the transposed matrix of B matrixes；
Finally, fitting coefficient C matrixes substitution cubic fit polynomial equation can be obtained what is oriented in current monochrome image
The centre coordinate correction value Facts of each lamp point, such as following formula：
F=C* [1 x y xy x2 y2 xy2 x2y x3 y3]T
Wherein, C is fitting coefficient, and F is the centre coordinate correction value for each lamp point oriented in current monochrome image
Facts。
In addition it is noted that calculating the centre coordinate correction value Facts for each lamp point that monochrome image is oriented
When be not limited to using the 1st monochrome image (picture numbers 1) as referring to monochrome image, any one in monochrome image group
Monochrome image can be used as referring to monochrome image.
Step (3)：Positioned in other remaining monochrome images in calculating monochrome image group in addition to reference to monochrome image
After the centre coordinate correction value Facts of each lamp point gone out, it will be sat with reference to the center for each lamp point oriented in monochrome image
Mark what is oriented in other remaining monochrome images in collection value Originals and monochrome image group in addition to reference to monochrome image
The centre coordinate correction value Facts of each lamp point is incorporated as the overall center with color lamp point of corresponding display screen target area
Coordinate data.This sentences cell size as exemplified by 3*3, monochrome image group (such as red image group, green image group or blueness
Image sets) quantity be nine, then in each lamp point that will be oriented in a wherein monochrome image (referring to monochrome image)
The centre coordinate correction value for each lamp point oriented in heart coordinate collection value Originals and other remaining eight monochrome images
Facts is merged.
In other embodiments of the present invention, however it is not limited to calculated using based on the polynomial fitting method of least square method
The centre coordinate correction value Facts for each lamp point oriented in current monochrome image, can also use other method, such as such as
Lower method：
Directly calculate the centre coordinate collection value Originals of each lamp point oriented in current monochrome image and current
Between the centre coordinate desired value Targets for each lamp point oriented in monochrome image deviation average (averX,
AverY), then the centre coordinate collection value Originals of each lamp point to being oriented in current monochrome image is corrected
(averX, averY) obtains the centre coordinate correction value Facts for each lamp point oriented in current monochrome image；Wherein,
FactsXi=OriginalsXi-averX
FactsYi=OriginalsYi-averY
Wherein, i is lamp point sequence number, and n is the number for the lamp point oriented in current monochrome image.
In addition, correspondence of the present invention after the lamp position deviation modification method proposed using above-described embodiment is merged
After the overall centre coordinate data with color lamp point of display screen target area, on the one hand it can utilize in the lamp point after merging
Heart coordinate data calculates the luminous effective area S for each lamp point orientedi, then the hair of each lamp point gone out by analyzing and positioning
The size distribution situation of light effective area be can determine that in display screen target area display bright line or show concealed wire position (or
Claim bright concealed wire position)；On the other hand, can further be calculated after the luminous effective area for each lamp point oriented is calculated
Brightness value after the Area Compensation of each lamp point, namely relatively bright angle value LiWith the luminous effective area average value of each lamp point's
Product divided by luminous effective area SiQuotientOr normalization brightness value Li' luminous the having with each lamp point
Imitate area averageProduct divided by luminous effective area SiQuotientFurther according to each lamp oriented
After the Area Compensation of point corresponding to brightness value each lamp point that the difference between gamma correction desired value can be oriented respectively
The point of the physical lamp in display screen target area brightness correction coefficients, the computational methods of specific luminous effective area can join
See the application number of Xian Electronics Science and Technology University and Xi'an Novastar Electronic Technology Co., Ltd. in 01 month joint application on the 24th in 2014
For 201410034968.6, in the application for a patent for invention of entitled " brightness correcting method and device of LED display "
Lamp point luminous effective area computational methods, content quotation disclosed by it is in this as reference, and in brief, the invention is special
The luminous effective area of lamp point oriented in profit application is equal to the centre coordinate of the lamp point to multiple lamp points adjacent thereto
Centre coordinate the polygon surrounded apart from the perpendicular bisector of line area, adjacent multiple lamp points herein are for example
It is the 4 neighborhood lamp points or eight neighborhood lamp point of center lamp point.In addition, what deserves to be explained is, multiply after reference area compensation during brightness
With the effective area average value that lightsIt is because the foregoing relatively bright angle value L calculatediOr normalization brightness value Li' numerical value
It is typically small, its directly with luminous effective area SiQuotient it is just smaller, can so cause the brightness correction coefficients calculated
Possible precision is inadequate, preferably multiplied by with the effective area average value that lightsBrightness and relative luminance after guarantee Area Compensation
Value LiOr normalization brightness value Li' numerical value substantially in same level.
In summary, the above embodiment of the present invention is directed to the achromatic map being likely to occur in big visual angle dot interlace gatherer process at present
As between the problem of lamp space of points position deviation, a certain monochrome image in multiple monochrome images with color collected is made
For with reference to monochrome image and using the centre coordinate collection value with reference to the multiple lamp points oriented in monochrome image as benchmark to it
His remaining monochrome image enters portable lighter position deviation amendment, and it may achieve following one or more beneficial effects：I) reduce or disappear
Except blocked because of camera shake, camera or screen body, the lamp position deviation between image caused by non-static ambient light interference etc.；With
And ii) big using the camera fields of view of big visual angle acquisition correction, it can avoid frequently moving camera angle lenses, and then save a large amount of schools
The positive time.
So far, specific case used herein lamp position deviation modification method the monochrome image of the present invention and its
The principle and embodiment of application are set forth, the explanation of above example be only intended to help the method for understanding the present invention and
Its core concept；Meanwhile for those of ordinary skill in the art, according to the thought of the present invention, in embodiment and answer
With there will be changes in scope, in summary, this specification content should not be construed as limiting the invention, of the invention
Protection domain should be defined by appended claim.
Claims (10)
1. lamp position deviation modification method between a kind of monochrome image, including step：(a) display screen target area is sequentially gathered
Multiple display pictures are accordingly to obtain multiple monochrome images with color, wherein the display screen target area is comprising multiple
The cell of repeated arrangement along the line of the column direction, each described cell include multiple LED pixel points, each described display picture
Face be by control light in the multiple cell in same position a LED pixel point a kind of color LED point and
Obtain and the multiple display picture corresponds to the LED pixel point that diverse location is in the multiple cell respectively；It is special
Sign is, in addition to step：
(b) image procossing is carried out to multiple described monochrome images to obtain the multiple lamps oriented in each Zhang Suoshu monochrome images
The centre coordinate collection value of point；
(c) monochrome image in multiple described monochrome images is chosen to be used as with reference to monochrome image and calculate multiple described lists
In color image except it is described with reference to monochrome image in addition to all remaining monochrome images in the center of the multiple lamp point oriented
Coordinate modification value, wherein, the centre coordinate correction value for the multiple lamp point oriented in each remaining monochrome image of calculating
Including sub-step：
(c1) the centre coordinate collection value with reference to the multiple lamp point oriented in monochrome image, described with reference to single is utilized
Corresponding to position in cell of LED pixel point in display picture corresponding to color image, the remaining monochrome image
The size of position and cell of the LED pixel point in cell in display picture obtains positioning in the remaining monochrome image
The centre coordinate desired value of the multiple lamp point gone out；And
(c2) the centre coordinate collection value and centre coordinate of the multiple lamp point oriented in the remaining monochrome image are utilized
Target is worth to the centre coordinate correction value for the multiple lamp point oriented in the remaining monochrome image；And
(d) the centre coordinate collection value with reference to the multiple lamp point oriented in monochrome image and all remaining lists are merged
Entirety same face of the centre coordinate correction value for the multiple lamp point oriented in color image as the display screen target area
The centre coordinate data of colored lights point.
2. lamp position deviation modification method between monochrome image as claimed in claim 1, it is characterised in that in step (a), institute
It is multiple red images, multiple green images or multiple blue images that multiple, which are stated, with the monochrome image of color.
3. lamp position deviation modification method between monochrome image as claimed in claim 1, it is characterised in that step (b) includes
The center for the multiple lamp point for obtaining orienting in each Zhang Suoshu monochrome images using grey scale centre of gravity method or ellipse fitting method
Coordinate collection value.
4. lamp position deviation modification method between monochrome image as claimed in claim 1, it is characterised in that in step (c)
The reference monochrome image is first monochrome image collected in step (a).
5. lamp position deviation modification method between monochrome image as claimed in claim 1, it is characterised in that sub-step (c2) is wrapped
Include：
Using the polynomial fitting equation based on least square method by the multiple lamp oriented in the remaining monochrome image
The centre coordinate collection value of point constructs the first fit metric；
The second fitting is constructed using the centre coordinate desired value for the multiple lamp point oriented in the remaining monochrome image
Fitting result of the matrix as the polynomial fitting equation；
Fitting coefficient matrix is calculated using first fit metric and second fit metric；And
The fitting coefficient matrix is substituted into the polynomial fitting equation to orient to calculate in the remaining monochrome image
The multiple lamp point centre coordinate correction value.
6. lamp position deviation modification method between monochrome image as claimed in claim 1, it is characterised in that sub-step (c2) is wrapped
Include：
Calculate the centre coordinate collection value and centre coordinate target for the multiple lamp point oriented in the remaining monochrome image
The deviation average of value；And
The centre coordinate collection value for the multiple lamp point oriented in the remaining monochrome image is subtracted into the deviation to put down
Average and obtain the centre coordinate correction value of the multiple lamp point oriented in the remaining monochrome image.
7. lamp position deviation modification method between monochrome image as claimed in claim 1, it is characterised in that the display screen mesh
Mark overall viewing area or partial display area of the region for LED display.
8. a kind of bright concealed wire of display screen determines method, it is characterised in that including step：
Corresponding institute is obtained using lamp position deviation modification method between the monochrome image as described in claim 1 to 7 any one
State the overall centre coordinate data with color lamp point of display screen target area；
Calculate the luminous effective area of each lamp point in the centre coordinate data, each of which lamp point it is luminous effectively
Area be equal to the lamp point centre coordinate value to multiple lamp points adjacent thereto centre coordinate value apart from the vertical of line
The area for the polygon that bisector is surrounded；And
The size distribution of the luminous effective area of each lamp point in the centre coordinate data determines described aobvious
Bright concealed wire position in display screen target area.
9. a kind of display screen uniformity correcting method, it is characterised in that including step：
Corresponding institute is obtained using lamp position deviation modification method between the monochrome image as described in claim 1 to 7 any one
State the overall centre coordinate data with color lamp point of display screen target area；
Calculate the luminous effective area of each lamp point in the centre coordinate data, each of which lamp point it is luminous effectively
Area be equal to the lamp point centre coordinate value to multiple lamp points adjacent thereto centre coordinate value apart from the vertical of line
The area for the polygon that bisector is surrounded；
Obtain the relatively bright angle value of each lamp point in the multiple lamp point oriented in each Zhang Suoshu monochrome images；
The area of each lamp point is calculated in the relatively bright angle value and the luminous effective area based on each lamp point
Brightness value after compensation；And
The lamp is obtained according to the difference after the Area Compensation of each lamp point between brightness value and gamma correction desired value
The brightness correction coefficients of the corresponding physical lamp point in the display screen target area of point.
10. a kind of display screen uniformity correcting method, it is characterised in that including step：
Corresponding institute is obtained using lamp position deviation modification method between the monochrome image as described in claim 1 to 7 any one
State the overall centre coordinate data with color lamp point of display screen target area；
Calculate the luminous effective area of each lamp point in the centre coordinate data, each of which lamp point it is luminous effectively
Area be equal to the lamp point centre coordinate value to multiple lamp points adjacent thereto centre coordinate value apart from the vertical of line
The area for the polygon that bisector is surrounded；
Obtain the relatively bright angle value, simultaneously of each lamp point in the multiple lamp point oriented in each Zhang Suoshu monochrome images
The relatively bright angle value for the multiple lamp point oriented in multiple described monochrome images is normalized to obtain
The normalization brightness value of each lamp point；
The face of each lamp point is calculated in the normalization brightness value and the luminous effective area based on each lamp point
Brightness value after product compensation；And
The lamp is obtained according to the difference after the Area Compensation of each lamp point between brightness value and gamma correction desired value
The brightness correction coefficients of the corresponding physical lamp point in the display screen target area of point.
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| CN107633806B (en) * | 2016-07-15 | 2019-12-24 | 西安诺瓦星云科技股份有限公司 | Shading correction processing method for LED display device |
| CN107230442B (en) * | 2017-05-22 | 2020-10-27 | 苏州科达科技股份有限公司 | LED display screen lamp point positioning method and device |
| WO2021031096A1 (en) * | 2019-08-20 | 2021-02-25 | Huawei Technologies Co., Ltd. | Multi-shot image capture without image stabilization |
| CN112785963B (en) * | 2019-11-06 | 2022-02-08 | 杭州海康威视数字技术股份有限公司 | LED lamp bead positioning method and device and storage medium |
| CN111210764B (en) * | 2020-01-21 | 2021-01-12 | 卡莱特（深圳）云科技有限公司 | LED screen correction method and correction device |
| CN111553912A (en) * | 2020-05-08 | 2020-08-18 | 视睿（杭州）信息科技有限公司 | Industrial particle continuous product image cutting method and device based on template matching |
| CN113450688A (en) * | 2020-07-09 | 2021-09-28 | 重庆康佳光电技术研究院有限公司 | Display screen compensation method and device and electronic equipment |
| CN112634823B (en) * | 2020-12-29 | 2022-11-15 | 深圳Tcl数字技术有限公司 | Display screen box body edge parameter correction method and device, equipment and storage medium |
| CN113257181B (en) * | 2021-06-29 | 2021-10-22 | 卡莱特云科技股份有限公司 | LED screen correction image acquisition method, correction method, acquisition device and correction system |
| CN113571010B (en) * | 2021-07-29 | 2022-10-21 | 西安诺瓦星云科技股份有限公司 | Brightness and chrominance information acquisition method, device and system and computer readable storage medium |
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