CN105304002A - LED display screen splicing error detection method and device - Google Patents
LED display screen splicing error detection method and device Download PDFInfo
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Abstract
The invention discloses an LED display screen splicing error detection method and a detection device, wherein the method comprises the following steps: acquiring an image of a spliced region of an LED display screen; recognizing first LED pixel points and second LED pixel points from the image; acquiring the location of the first LED pixel points in the image and the location of the second LED pixel points in the image; and on the basis of the location of the first LED pixel points and the location of the second LED pixel points, determining a splicing error of the LED display screen, wherein the image is obtained by shooting the spliced region; the LED display screen comprises a first display unit and a second display unit; the spliced region is obtained by splicing the first display unit and the second display unit; the first display unit comprises a plurality of the first LED pixel points; and the second display unit comprises a plurality of the second LED pixel points. The detection method and the detection device disclosed by the invention can solve the technical problem that an LED screen, acquired by related technologies, is relatively low in splicing error precision.
Description
Technical field
The present invention relates to field of display devices, in particular to a kind of detection method and device of LED display stitching error.
Background technology
LED screen is formed by numerous small size unit spliced, all that manual operation is spliced at the construction field (site), keep away unavoidable appearance splicing positive error and negative error like this, gap is had between positive error and unit, adjacent two row or two portable lighters between distance be greater than pel spacing, when the screen that there is gap is watched image, the gap place of screen can produce concealed wire; Extruding is had between negative error and unit, adjacent two row or two portable lighters between distance be less than pel spacing, when image watched by the screen that there is extruding phenomenon, the extrusion position place of screen can produce bright line, thus have impact on display effect and the display quality of LED display, in order to improve the display effect of LED, adjust according to each unit of stitching error to LED with regard to needing, but only by manually estimating stitching error in prior art, because the precision manually estimated is lower, the impact that stitching error shows LED screen still can not be eliminated.
For the technical matters that the precision of the stitching error of the LED screen got in correlation technique is lower, at present effective solution is not yet proposed.
Summary of the invention
Embodiments provide a kind of detection method and device of LED display stitching error, with the technical matters that the precision of the stitching error at least solving the LED screen got in correlation technique is lower.
According to an aspect of the embodiment of the present invention, provide a kind of detection method of LED display stitching error, the method comprises: the image obtaining the splicing regions of LED display, wherein, image is to take pictures the image obtained to splicing regions, LED display comprises the first display unit and the second display unit, splicing regions is that the first display unit and the second display unit splice the region obtained, first display unit comprises a multiple LED pixel, and the second display unit comprises multiple 2nd LED pixel; A LED pixel and the 2nd LED pixel is identified from image; Obtain LED pixel position in the picture and the 2nd LED pixel position in the picture; And the stitching error of LED display is determined based on the position of a LED pixel and the position of the 2nd LED pixel.
Further, from image, a LED pixel is identified and the 2nd LED pixel comprises: the brightness value obtaining each pixel in image; Judge whether the brightness value of pixel is greater than predetermined luminance value one by one; And if the brightness value of pixel is greater than predetermined luminance value, then identifying pixel is a LED pixel or the 2nd LED pixel.
Further, a LED pixel in image and the 2nd LED pixel are positioned at the same coordinate system, obtain LED pixel position in the picture and the 2nd LED pixel position in the picture comprises: obtain LED pixel coordinate in a coordinate system and the 2nd LED pixel coordinate in a coordinate system.
Further, coordinate comprises horizontal ordinate and ordinate, with the position of the 2nd LED pixel, the position based on a LED pixel determines that the stitching error of LED display comprises: filter out from a multiple LED pixel at least two horizontal ordinates identical be the 3rd LED pixel; Respectively with at least two the 3rd LED pixels for starting point calculates at least two coordinate difference value sets, wherein, each coordinate difference value set is for preserving the set of the coordinate difference of the ordinate LED pixel identical with the ordinate of same 3rd LED pixel, coordinate difference is the difference between the horizontal ordinate of two adjacent LED pixels, and LED pixel comprises a LED pixel and the 2nd LED pixel; Filtering out in each coordinate difference value set the coordinate difference being greater than or less than preset difference value is error of coordinate; And at least two the error of coordinate determination stitching errors corresponding according at least two coordinate difference value sets.
Further, at least two corresponding according at least two coordinate difference value sets error of coordinate determination stitching errors comprise: obtain the scale parameter between image and splicing regions; And proportionally parameter processes at least two error of coordinates, obtains stitching error.
According to another aspect of the embodiment of the present invention, provide a kind of pick-up unit of LED display stitching error, this device comprises: the first acquiring unit, for obtaining the image of the splicing regions of LED display, wherein, image is to take pictures the image obtained to splicing regions, LED display comprises the first display unit and the second display unit, splicing regions is that the first display unit and the second display unit splice the region obtained, first display unit comprises a multiple LED pixel, and the second display unit comprises multiple 2nd LED pixel; Recognition unit, for identifying a LED pixel and the 2nd LED pixel from image; Second acquisition unit, for obtaining LED pixel position in the picture and the 2nd LED pixel position in the picture; And determining unit, for determining the stitching error of LED display based on the position of a LED pixel and the position of the 2nd LED pixel.
Further, recognition unit comprises: the first acquisition module, for obtaining the brightness value of each pixel in image; Judge module, for judging whether the brightness value of pixel is greater than predetermined luminance value one by one; Identification module, if be greater than predetermined luminance value for the brightness value of pixel, then identifying pixel is a LED pixel or the 2nd LED pixel.
Further, a LED pixel in image and the 2nd LED pixel are positioned at the same coordinate system, second acquisition unit comprises: the second acquisition module, for obtaining LED pixel coordinate in a coordinate system and the 2nd LED pixel coordinate in a coordinate system.
Further, coordinate comprises horizontal ordinate and ordinate, and determining unit comprises: the first screening module, for filter out from a multiple LED pixel at least two horizontal ordinates identical be the 3rd LED pixel; Computing module, for respectively with at least two the 3rd LED pixels for starting point calculates at least two coordinate difference value sets, wherein, each coordinate difference value set is for preserving the set of the coordinate difference of the ordinate LED pixel identical with the ordinate of same 3rd LED pixel, coordinate difference is the difference between the horizontal ordinate of two adjacent LED pixels, and LED pixel comprises a LED pixel and the 2nd LED pixel; Second screening module is error of coordinate for filtering out in each coordinate difference value set the coordinate difference being greater than or less than preset difference value; And determination module, at least two the error of coordinate determination stitching errors corresponding according at least two coordinate difference value sets.
Further, determination module comprises: obtain submodule, for obtaining the scale parameter between image and splicing regions; And calculating sub module, for proportionally parameter, at least two error of coordinates are processed, obtain stitching error.
In embodiments of the present invention, obtain the image of the splicing regions of LED display, wherein, image is to take pictures the image obtained to splicing regions, LED display comprises the first display unit and the second display unit, splicing regions is that the first display unit and the second display unit splice the region obtained, and the first display unit comprises a multiple LED pixel, and the second display unit comprises multiple 2nd LED pixel; A LED pixel and the 2nd LED pixel is identified from image; Obtain LED pixel position in the picture and the 2nd LED pixel position in the picture; And the stitching error of LED display is determined based on the position of a LED pixel and the position of the 2nd LED pixel, thus the technical matters that the precision solving the stitching error of the LED screen got in correlation technique is lower, improve the precision of the stitching error of the LED screen detected.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the process flow diagram of the detection method of LED display stitching error according to the embodiment of the present invention;
Fig. 2 is the schematic diagram of the measuring system of an optional stitching error according to the embodiment of the present invention;
Fig. 3 a is the schematic diagram of the stitching error image according to the embodiment of the present invention;
Fig. 3 b is the schematic diagram of an optional splicing regions according to the embodiment of the present invention;
Fig. 3 c is the schematic diagram of another the optional splicing regions according to the embodiment of the present invention;
Fig. 4 is the schematic diagram of the light intensity of pixel in the image according to the embodiment of the present invention;
Fig. 5 is the schematic diagram of the measuring system of another optional stitching error according to the embodiment of the present invention;
Fig. 6 is the schematic diagram of the measuring system of the 3rd optional stitching error according to the embodiment of the present invention;
Fig. 7 is the schematic diagram of the measurement result of stitching error according to the embodiment of the present invention; And
Fig. 8 is the schematic diagram of the pick-up unit of LED display stitching error according to the embodiment of the present invention.
Embodiment
The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
It should be noted that, term " first ", " second " etc. in instructions of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged in the appropriate case, so as embodiments of the invention described herein can with except here diagram or describe those except order implement.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
According to the embodiment of the present invention, provide a kind of embodiment of the method for detection method of LED display stitching error, it should be noted that, can perform in the computer system of such as one group of computer executable instructions in the step shown in the process flow diagram of accompanying drawing, and, although show logical order in flow charts, in some cases, can be different from the step shown or described by order execution herein.
Fig. 1 is the process flow diagram of the detection method of LED display stitching error according to the embodiment of the present invention, and as shown in Figure 1, the method comprises the steps:
Step S102, obtain the image of the splicing regions of LED display, wherein, image is to take pictures the image obtained to splicing regions, LED display comprises the first display unit and the second display unit, splicing regions is that the first display unit and the second display unit splice the region obtained, and the first display unit comprises a multiple LED pixel, and the second display unit comprises multiple 2nd LED pixel.
Step S104, identifies a LED pixel and the 2nd LED pixel from image.
Step S106, obtains LED pixel position in the picture and the 2nd LED pixel position in the picture.
Step S108, determines the stitching error of LED display based on the position of a LED pixel and the position of the 2nd LED pixel.
Pass through above-described embodiment, obtain the image of the splicing regions of LED display, wherein, image is to take pictures the image obtained to splicing regions, LED display comprises the first display unit and the second display unit, splicing regions is that the first display unit and the second display unit splice the region obtained, and the first display unit comprises a multiple LED pixel, and the second display unit comprises multiple 2nd LED pixel; A LED pixel and the 2nd LED pixel is identified from image; Obtain LED pixel position in the picture and the 2nd LED pixel position in the picture; And the stitching error of LED display is determined based on the position of a LED pixel and the position of the 2nd LED pixel, thus the technical matters that the precision solving the stitching error of the LED screen got in correlation technique is lower, improve the precision of the stitching error of the LED screen detected.
Particularly, the above-mentioned steps of the application can be realized by the system shown in Fig. 2, in LED screen 201, first play the video with significant effect, and digital single-lens reflex camera 202 is installed in LED screen normal direction, taken pictures in splicing gap 204 between the display unit 203 (as the first display unit or the second display unit) in screen, the digital picture egative film obtained taking pictures is transferred to computing machine 205, splicing position in the picture, gap is identified by image procossing, and by calculating the size in splicing gap.It should be noted that, the above-mentioned video with significant effect mainly refers to the video that brightness value is higher.
In the embodiment of the present application from image, identify a LED pixel and the 2nd LED pixel can realize as follows: the brightness value obtaining each pixel in image; Judge whether the brightness value of pixel is greater than predetermined luminance value one by one; And if the brightness value of pixel is greater than predetermined luminance value, then identifying pixel is a LED pixel or the 2nd LED pixel.
The all objects that the image obtained comprises shooting area are taken by above-mentioned digital single-lens reflex camera, and the application only needs to process LED pixel wherein, in order to obtain the image (as shown in Figure 3 a) marking LED pixel, can analyze the brightness value of each pixel in image (i.e. light intensity), illustrate in Fig. 4 and the result that Intensity Analysis obtains has been carried out to a part of region in image, the longitudinal axis in Fig. 4 represents the light intensity of pixel, transverse axis represents the distance of pixel and normal, the strongest pixel (being also namely greater than the pixel of predetermined luminance value) the i.e. LED pixel of the middle light intensity of each pixel is (as the LED1 in Fig. 4, LED2, LED3 to LEDN).After determining LED pixel, stitching error can be determined according to the difference between the coordinate of LED pixel.
Alternatively, a LED pixel in image and the 2nd LED pixel are positioned at the same coordinate system, obtain LED pixel position in the picture and the 2nd LED pixel position in the picture can comprise: obtain LED pixel coordinate in a coordinate system and the 2nd LED pixel coordinate in a coordinate system.As shown in Figure 3 a, the first display unit 301 and the second display unit 302 of LED display is shown in Fig. 3 a, has also show splicing gap 303, splicing regions 305 and LED pixel 304.When calculating, obtaining the coordinate of a LED pixel and the 2nd LED pixel respectively, then can determine stitching error according to coordinate difference.It should be noted that, in Fig. 3 a, merely illustrate the part LED pixel of the first display unit 301 and the second display unit 302.
Particularly, above-mentioned coordinate comprises horizontal ordinate and ordinate, and position and the position of the 2nd LED pixel based on a LED pixel determine that the stitching error of LED display can comprise: filter out from a multiple LED pixel at least two horizontal ordinates identical be the 3rd LED pixel; Respectively with at least two the 3rd LED pixels for starting point calculates at least two coordinate difference value sets, wherein, each coordinate difference value set is for preserving the set of the coordinate difference of the ordinate LED pixel identical with the ordinate of same 3rd LED pixel, coordinate difference is the difference between the horizontal ordinate of two adjacent LED pixels, and LED pixel comprises a LED pixel and the 2nd LED pixel; Filtering out in each coordinate difference value set the coordinate difference being greater than or less than preset difference value is error of coordinate; And at least two the error of coordinate determination stitching errors corresponding according at least two coordinate difference value sets.
Can from Fig. 3 a the leftmost side a row LED pixel in choose two be the 3rd LED pixel, then with these two LED pixels for starting point calculates distance between two adjacent LEDs pixel successively by left and the right side, namely the coordinate difference between LED pixel that the 3rd LED pixel is expert at is calculated, and by all coordinate differences of this row stored in same coordinate difference value set, then from each coordinate difference value set, filter out the coordinate difference differing larger with the numerical value of other coordinate difference (be namely greater than or less than the error of coordinate of preset difference value, gauged distance between preset difference value and LED pixel), then stitching error is determined according to error of coordinate.
It should be noted that, Fig. 3 b is the enlarged drawing of splicing regions 305 in Fig. 3 a, as shown in Figure 3 b, distance between two LED pixels in display unit is p (i.e. preset difference value), the distance on the border of LED pixel and display unit is p/2, if error has appearred in splicing, just there will be gap between two concatenation units, the length x1 in gap has been the difference of error of coordinate and P; If occurred when splicing extruding situation about just there will be as shown in Figure 3 c, namely the border of two unit has been subjected to displacement because of extruding, and the length x2 of displacement is that the horizontal ordinate difference of two the LED pixels being positioned at stitching position two ends deducts P.
By above-described embodiment, by the process to image, the position of stitching error can be determined and realize the measurement of stitching error.
In an optional embodiment, at least two the error of coordinate determination stitching errors corresponding according at least two coordinate difference value sets comprise: obtain the scale parameter between image and splicing regions; And proportionally parameter processes at least two error of coordinates, obtains stitching error.
Particularly, if two error of coordinates are respectively x3 and x4, scale parameter is k, so can determine corresponding stitching error f1 and f2 according to following formula, f1=k* (x3-p), f2=k* (x4-p), p is the gauged distance between two LED pixels.
After determining above-mentioned stitching error f1 and f2, can by following formula determine splicing gap in optional position (ordinate of this position is stitching error f y),
in formula, y1 and y2 is respectively the ordinate of above-mentioned two LED pixels.
In embodiment as shown in Figure 5 and Figure 6, can be first that the video that LED screen makes is play by being transferred to LED screen 601 after video card process by computer end, and then taken pictures by digital camera (being namely positioned at the digital camera of current location 605) the splicing gap to LED screen, then image procossing is carried out to the image obtained, obtain error of coordinate (i.e. measurement result), then proportionally parameter processes error of coordinate, thus can stitching error be obtained, it should be noted that, the border of the display unit of composition LED screen is uniform straight line, when two display unit splicings, splicing gap may not be identical in the size of diverse location, in order to ensure to measure validity, for each stitching position at least need record two groups splicing error informations, to obtain the corresponding relation formula of error and gap position.When next gap measured by needs, along the direction shown in arrow 604, the digital camera on camera slide rail 603 is moved to the next position 606, to measure gap 602.
The schematic diagram of the stitching error of the LED screen of a 4*4 unit as shown in Figure 7, two groups of data corresponding to the splicing gap between unit 1 with unit 2 are 0.1 millimeter, and two groups of data corresponding to the gap between unit 1 with unit 3 are respectively 0.1 millimeter and 0.2 millimeter.
By above-described embodiment, every bar piece calculates two place's data, is plotted in by precise results on the comprehensive drawing by screen scaled down, for workmen's reference, also for reviewer, screen quality is passed judgment on, to improve screen further, improve display quality.
It should be noted that, for aforesaid each embodiment of the method, in order to simple description, therefore it is all expressed as a series of combination of actions, but those skilled in the art should know, the present invention is not by the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in instructions all belongs to preferred embodiment, and involved action and module might not be that the present invention is necessary.
The embodiment of the present invention additionally provides a kind of pick-up unit of LED display stitching error.It should be noted that, the pick-up unit of the LED display stitching error of the embodiment of the present invention may be used for the detection method performing the LED display stitching error that the embodiment of the present invention provides, and the pick-up unit of the LED display stitching error that the detection method of the LED display stitching error of the embodiment of the present invention also can be provided by the embodiment of the present invention performs.
Fig. 8 is the schematic diagram of the pick-up unit of LED display stitching error according to the embodiment of the present invention.As shown in Figure 8, this device can comprise: the first acquiring unit 10, recognition unit 20, second acquisition unit 30 and determining unit 40.First acquiring unit 10 is for obtaining the image of the splicing regions of LED display, wherein, image is to take pictures the image obtained to splicing regions, LED display comprises the first display unit and the second display unit, splicing regions is that the first display unit and the second display unit splice the region obtained, first display unit comprises a multiple LED pixel, and the second display unit comprises multiple 2nd LED pixel; Recognition unit 20 for identifying a LED pixel and the 2nd LED pixel from image; Second acquisition unit 30 is for obtaining LED pixel position in the picture and the 2nd LED pixel position in the picture; And determining unit 40 is for determining the stitching error of LED display based on the position of a LED pixel and the position of the 2nd LED pixel.
The pick-up unit of the LED display stitching error that the embodiment of the present application provides, the image of the splicing regions of LED display is obtained by the first acquiring unit 10, wherein, image is to take pictures the image obtained to splicing regions, LED display comprises the first display unit and the second display unit, splicing regions is that the first display unit and the second display unit splice the region obtained, and the first display unit comprises a multiple LED pixel, and the second display unit comprises multiple 2nd LED pixel; Recognition unit 20 identifies a LED pixel and the 2nd LED pixel from image; Second acquisition unit 30 obtains LED pixel position in the picture and the 2nd LED pixel position in the picture; And determining unit 40 determines the stitching error of LED display based on the position of a LED pixel and the position of the 2nd LED pixel, thus the technical matters that the precision solving the stitching error of the LED screen got in correlation technique is lower, improve the precision of the stitching error of the LED screen detected.
In the above-described embodiments, recognition unit 20 can comprise: the first acquisition module, for obtaining the brightness value of each pixel in image; Judge module, for judging whether the brightness value of pixel is greater than predetermined luminance value one by one; Identification module, if be greater than predetermined luminance value for the brightness value of pixel, then identifying pixel is a LED pixel or the 2nd LED pixel.
Alternatively, a LED pixel in image and the 2nd LED pixel are positioned at the same coordinate system, second acquisition unit 30 can comprise: the second acquisition module, for obtaining LED pixel coordinate in a coordinate system and the 2nd LED pixel coordinate in a coordinate system.
By above-described embodiment, by the process to image, the position of stitching error can be determined and realize the measurement of stitching error.
In an optional embodiment, coordinate comprises horizontal ordinate and ordinate, and determining unit 40 can comprise: the first screening module, for filter out from a multiple LED pixel at least two horizontal ordinates identical be the 3rd LED pixel; Computing module, for respectively with at least two the 3rd LED pixels for starting point calculates at least two coordinate difference value sets, wherein, each coordinate difference value set is for preserving the set of the coordinate difference of the ordinate LED pixel identical with the ordinate of same 3rd LED pixel, coordinate difference is the difference between the horizontal ordinate of two adjacent LED pixels, and LED pixel comprises a LED pixel and the 2nd LED pixel; Second screening module is error of coordinate for filtering out in each coordinate difference value set the coordinate difference being greater than or less than preset difference value; And determination module, at least two the error of coordinate determination stitching errors corresponding according at least two coordinate difference value sets.
Particularly, determination module can comprise: obtain submodule, for obtaining the scale parameter between image and splicing regions; And calculating sub module, for proportionally parameter, at least two error of coordinates are processed, obtain stitching error.
By above-described embodiment, every bar piece calculates two place's data, is plotted in by precise results on the comprehensive drawing by screen scaled down, for workmen's reference, also for reviewer, screen quality is passed judgment on, to improve screen further, improve display quality.
The modules provided in the present embodiment is identical with the using method that the corresponding step of embodiment of the method provides, application scenarios also can be identical.It is noted, of course, that the scheme that above-mentioned module relates to can be not limited to content in above-described embodiment and scene, and above-mentioned module may operate in terminal or mobile terminal, can pass through software or hardware implementing.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
In the above embodiment of the present invention, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
In several embodiments that the application provides, should be understood that, disclosed technology contents, the mode by other realizes.Wherein, device embodiment described above is only schematic, the such as division of described unit, can be that a kind of logic function divides, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of unit or module or communication connection can be electrical or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed on multiple unit.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.
If described integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprises all or part of step of some instructions in order to make a computer equipment (can be personal computer, server or the network equipment etc.) perform method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, ROM (read-only memory) (ROM, Read-OnlyMemory), random access memory (RAM, RandomAccessMemory), portable hard drive, magnetic disc or CD etc. various can be program code stored medium.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a detection method for LED display stitching error, is characterized in that, comprising:
Obtain the image of the splicing regions of LED display, wherein, described image is to take pictures the image obtained to described splicing regions, described LED display comprises the first display unit and the second display unit, described splicing regions is that described first display unit and described second display unit splice the region obtained, described first display unit comprises a multiple LED pixel, and described second display unit comprises multiple 2nd LED pixel;
A described LED pixel and described 2nd LED pixel is identified from described image;
Obtain the position of a described LED pixel in described image and described 2nd position of LED pixel in described image; And
The stitching error of described LED display is determined based on the position of a described LED pixel and the position of described 2nd LED pixel.
2. method according to claim 1, is characterized in that, identifies a described LED pixel and described 2nd LED pixel comprises from described image:
Obtain the brightness value of each pixel in described image;
Judge whether the brightness value of described pixel is greater than predetermined luminance value one by one; And
If the brightness value of described pixel is greater than described predetermined luminance value, then identifying described pixel is a described LED pixel or described 2nd LED pixel.
3. method according to claim 2, it is characterized in that, a described LED pixel in described image and described 2nd LED pixel are positioned at the same coordinate system, obtain the position of a described LED pixel in described image and described 2nd position of LED pixel in described image comprises:
Obtain the coordinate of a described LED pixel in described coordinate system and the coordinate of described 2nd LED pixel in described coordinate system.
4. method according to claim 3, is characterized in that, described coordinate comprises horizontal ordinate and ordinate, determines that the stitching error of described LED display comprises based on the position of a described LED pixel and the position of described 2nd LED pixel:
Filter out from a described multiple LED pixel at least two horizontal ordinates identical be the 3rd LED pixel;
Respectively with at least two described 3rd LED pixels for starting point calculates at least two coordinate difference value sets, wherein, each described coordinate difference value set is for preserving the set of the coordinate difference of the ordinate LED pixel identical with the ordinate of same described 3rd LED pixel, described coordinate difference is the difference between the horizontal ordinate of two adjacent described LED pixels, and described LED pixel comprises a described LED pixel and described 2nd LED pixel;
Filtering out the coordinate difference being greater than or less than preset difference value in each described coordinate difference value set is error of coordinate; And
At least two the described error of coordinates corresponding according to described at least two coordinate difference value sets determine described stitching error.
5. method according to claim 4, is characterized in that, at least two the described error of coordinates corresponding according to described at least two coordinate difference value sets determine that described stitching error comprises:
Obtain the scale parameter between described image and described splicing regions; And
According to described scale parameter, at least two described error of coordinates are processed, obtain described stitching error.
6. a pick-up unit for LED display stitching error, is characterized in that, comprising:
First acquiring unit, for obtaining the image of the splicing regions of LED display, wherein, described image is to take pictures the image obtained to described splicing regions, described LED display comprises the first display unit and the second display unit, described splicing regions is that described first display unit and described second display unit splice the region obtained, and described first display unit comprises a multiple LED pixel, and described second display unit comprises multiple 2nd LED pixel;
Recognition unit, for identifying a described LED pixel and described 2nd LED pixel from described image;
Second acquisition unit, for obtaining the position of a described LED pixel in described image and described 2nd position of LED pixel in described image; And
Determining unit, for determining the stitching error of described LED display based on the position of a described LED pixel and the position of described 2nd LED pixel.
7. device according to claim 6, is characterized in that, described recognition unit comprises:
First acquisition module, for obtaining the brightness value of each pixel in described image;
Judge module, for judging whether the brightness value of described pixel is greater than predetermined luminance value one by one; And
Identification module, if be greater than described predetermined luminance value for the brightness value of described pixel, then identifying described pixel is a described LED pixel or described 2nd LED pixel.
8. device according to claim 7, is characterized in that, the described LED pixel in described image and described 2nd LED pixel are positioned at the same coordinate system, and described second acquisition unit comprises:
Second acquisition module, for obtaining the coordinate of a described LED pixel in described coordinate system and the coordinate of described 2nd LED pixel in described coordinate system.
9. device according to claim 8, is characterized in that, described coordinate comprises horizontal ordinate and ordinate, and described determining unit comprises:
First screening module, for filter out from a described multiple LED pixel at least two horizontal ordinates identical be the 3rd LED pixel;
Computing module, for respectively with at least two described 3rd LED pixels for starting point calculates at least two coordinate difference value sets, wherein, each described coordinate difference value set is for preserving the set of the coordinate difference of the ordinate LED pixel identical with the ordinate of same described 3rd LED pixel, described coordinate difference is the difference between the horizontal ordinate of two adjacent described LED pixels, and described LED pixel comprises a described LED pixel and described 2nd LED pixel;
Second screening module is error of coordinate for filtering out the coordinate difference being greater than or less than preset difference value in each described coordinate difference value set; And
Determination module, determines described stitching error at least two described error of coordinates corresponding according to described at least two coordinate difference value sets.
10. device according to claim 9, is characterized in that, described determination module comprises:
Obtain submodule, for obtaining the scale parameter between described image and described splicing regions; And
Calculating sub module, for processing at least two described error of coordinates according to described scale parameter, obtains described stitching error.
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| CN201510689481.6A CN105304002B (en) | 2015-10-21 | 2015-10-21 | The detection method and device of LED display stitching error |
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