CN115883805A - Multi-projector picture splicing color fusion method, fusion device and storage medium - Google Patents
Multi-projector picture splicing color fusion method, fusion device and storage medium Download PDFInfo
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Abstract
The invention discloses a multi-projector picture splicing color fusion method, a fusion device and a storage medium, which relate to the technical field of projection picture fusion, and comprise the steps of processing and dividing an image into at least two projection images with overlapping areas, and performing projection output; adjusting the position of the projector; carrying out picture geometric correction on a projection picture of the projector; correcting grids of picture overlapping areas of two adjacent projectors to finish picture splicing; attenuating half of the brightness of the fusion area, and respectively calculating the color values of the attenuated brightness in the fusion area; remapping the output color values of the projector in the fusion area; obtaining a projection output picture; and outputting projection output pictures by adjacent projectors to finish projection fusion. The invention has the advantages that the image brightness and the color value of the projection splicing fusion area are calculated by adopting gradient attenuation, and the consistency of the brightness, the color, the vividness and the uniformity of the whole projection screen picture can be effectively ensured.
Description
Technical Field
The invention relates to the technical field of projection picture fusion, in particular to a multi-projector picture splicing color fusion method, a fusion device and a storage medium.
Background
The large-screen display system is widely applied to the fields of traffic transportation scheduling command, large-scale meeting implementation, flight simulation training, combat command and the like. In order to achieve better visual immersion, the display screen is not only becoming larger in area, but also non-planar screens such as arc screens and spherical screens are produced, and in this case, the multi-projection splicing method is more and more widely used.
The traditional projector mainly uses a software fusion or hardware fusion mode to perform projection fusion splicing, wherein the software fusion or hardware fusion mode is adopted. The software fusion uses the program to process the edge of the output picture in advance, so that the adjacent overlapping projection areas are fused, and under the mode of software fusion, because the brightness and the color of different projectors are different, although the pictures in the overlapping areas can be fused together, the fusion band is obvious. And the hardware fusion inputs the picture into special hardware to carry out edge fusion algorithm processing, and then the processed picture is fused and displayed. The current market mainstream is the hardware fusion, and the principle is that the overlapping area of adjacent projectors is uniformly attenuated through a certain attenuation curve, so that the fusion is realized; however, the projector has the problem that the coloring area is too narrow under the influence of environmental factors or self reasons, so that color restoration cannot be realized, and particularly, the image with more gorgeous colors is more obvious.
Disclosure of Invention
In order to solve the technical problems, the technical scheme provides a multi-projector picture splicing color fusion method, a fusion device and a storage medium, and by providing a novel multi-projector picture splicing color fusion scheme, the uniformity of the brightness, color, vividness and uniformity of the whole projection screen picture can be effectively ensured by calculating the image brightness and color value of a projection splicing fusion area by adopting gradient attenuation.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
a multi-projector picture splicing color fusion method comprises the following steps:
processing and dividing the image into at least two projection images with overlapping areas, and respectively transmitting the plurality of projection images to a plurality of projectors for projection output;
adjusting the position of the projector to arrange the plurality of projection images according to the splicing sequence;
dividing a projection picture of the projector into grids, and performing picture geometric correction;
correcting grids of the image coincidence areas of the two adjacent projectors, fusing the images of the image coincidence areas of the two adjacent projectors, and completing image splicing;
performing half attenuation on the brightness of two adjacent projectors in the fusion area, and respectively calculating the color values of the two adjacent projectors after the brightness of pixel points in the fusion area is attenuated;
remapping the output color value of the pixel point of the projector in the fusion area according to the color value of the pixel point of the projector in the fusion area after the brightness attenuation and combining the three-primary-color gamut of the projector;
replacing the original color value of the fusion area with the pixel point corresponding to the image fusion area according to the output color value to obtain an image which is the image required to be output by the projector, and obtaining a projection output image;
outputting projection output pictures by adjacent projectors to complete projection fusion;
the calculation formula for calculating the color value of the projector after the brightness of the pixel point in the fusion area is as follows:
wherein C is the color value of the projector after the brightness of the fusion area is attenuated, C 0 The original color value of the fusion area, H is the width of the fusion area, and H is the distance between the pixel point and the edge of the projection picture of the projector;
the calculation formula of the output color value of the pixel point of the remapping projector in the fusion area is as follows:
in the formula, R, G and B are output red color values, output green color values and output blue color values of pixel points of the projector in the fusion area;
R max 、R min the maximum value and the minimum value of the red color gamut of the projector;
G max 、G min is a projectionMaximum and minimum values of the green color gamut of the instrument;
B max 、B min the maximum value and the minimum value of the blue color gamut of the projector;
R 0 、G 0 、B 0 the brightness of the projector in the fusion area is attenuated to obtain a red color value, a green color value and a blue color value;
δ 1 、δ 2 、δ 3 the correction coefficients of the projector are red correction coefficient, green correction coefficient and blue correction coefficient.
Preferably, R of the projector max 、R min Or G max 、G min Or B max 、B min The acquisition method comprises the following steps:
the projector outputs a picture with (255.0.0) or (0.255.0) or (0.0.255) color value, gradually reduces the red color value or the green color value or the blue color value, and records the current red color value or the green color value or the blue color value when the color of the picture begins to change, namely the R value of the projector max Or G max Or B max ；
Continuously reducing the red color value or the green color value or the blue color value, and recording the current red color value or the green color value or the blue color value when the picture color is changed into black, namely the R value of the projector min Or G min Or B min 。
Preferably, said delta 1 、δ 2 、δ 3 The acquisition method comprises the following steps:
half of the brightness of two adjacent projectors in the fusion area after the picture splicing is finished is attenuated, and the two projectors are controlled to output pictures with (255.0.0) or (0.255.0) or (0.0.255) color values;
calculating color values of two adjacent projectors after the brightness of pixel points in the fusion area is attenuated;
substituting the color value of the attenuated pixel brightness of the projector in the fusion area into a calculation formula for remapping the output color value of the pixel brightness of the projector in the fusion area, and gradually adjusting the delta of two adjacent projectors 1 、δ 2 、δ 3 To make the throwing inThe color of the fused area is consistent with that of the unfused area in the shadow picture, and delta at the moment is recorded 1 、δ 2 、δ 3 Namely the red correction coefficient, the green correction coefficient and the blue correction coefficient of the projector.
Preferably, the performing of the picture geometry correction specifically includes the following steps:
respectively recording output pictures of two adjacent projectors as a first projection picture and a second projection picture;
dividing the first projection picture and the second projection picture into grids with the transverse number of N and the longitudinal number of M, wherein the intersection positions of transverse lines and vertical lines are used as vertexes, four vertexes of four corners of the first projection picture are A0, A1, A2 and A3, and four vertexes of four corners of the second projection picture are B0, B1, B2 and B3;
moving the positions of the vertexes A0, A1, A2, A3, B0, B1, B2 and B3 so that A1A2 and B1B2 are kept on the same straight line, A0A3 and B0B3 are kept on the same straight line, and the sizes of the first projection and the second projection are kept consistent;
and finishing the geometric correction of the picture.
Preferably, the completing the picture splicing specifically includes the following steps:
moving the top points inside the overlapping areas in the first projection picture and the second projection picture so as to enable the top points of the overlapping areas in the first projection picture and the second projection picture to be overlapped;
moving vertexes in a non-overlapping area in the first projection picture and the second projection picture to enable the vertexes in the first projection picture and the second projection picture to be uniformly distributed;
and finishing picture splicing.
Further, a multi-projector picture splicing color fusion device is provided for implementing the multi-projector picture splicing color fusion method, including:
the processor is used for processing and dividing the image into at least two projection images with coincident regions, respectively transmitting the projection images to the projectors for projection output, dividing the projection pictures of the projectors into grids, performing picture geometric correction, correcting the grids of the picture coincident regions of the two adjacent projectors, fusing the pictures of the coincident regions of the two adjacent projectors, completing picture splicing, calculating the color value of the two adjacent projectors after the brightness of the pixel points in the fusion region is attenuated, combining the color value of the three primary colors of the projectors with the color gamut of the projectors according to the color value of the two adjacent projectors after the brightness of the pixel points in the fusion region is attenuated, and remapping the output color value of the pixel points of the projectors in the fusion region;
the video signal receiving module is used for receiving an externally input source video signal;
the video signal processing module is electrically connected with the processor and the video signal receiving module and is used for converting the source video signals received by the video signal receiving module into RGB signals and inputting the RGB signals into the processor;
the projection picture receiving module is electrically connected with the processor and is used for receiving a projection image and transmitting the projection image to the processor;
and the video signal output module is electrically connected with the processor and is used for outputting the processed video signal to an external projector.
Optionally, the processor includes:
the picture separation module is used for processing and dividing the image into at least two projection images with overlapped areas;
the picture correction module is used for dividing the projection picture of the projector into grids, carrying out picture geometric correction and correcting the grids of the picture coincidence areas of the two adjacent projectors, fusing the pictures of the coincidence areas of the two adjacent projectors and completing picture splicing;
the first calculation module is used for calculating color values of pixels of two adjacent projectors in the fusion area after the brightness of the pixels is attenuated;
and the second calculation module is used for remapping the output color values of the pixels of the projector in the fusion area.
Still further, a computer readable storage medium is provided, on which a computer readable program is stored, which when invoked, performs the multi-projector picture stitching color fusion method as described above.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a novel multi-projector picture splicing color fusion method, which adopts a gradient attenuation algorithm to calculate the attenuation color value after the brightness attenuation of a projection splicing fusion area, so that a projector can perform smooth transition between an overlapping area and a non-overlapping area, and the uniformity of a spliced picture is effectively ensured;
in the invention, the image output color value of the projector fusion area is calculated by adopting a three-primary-color remapping mode, and the three-primary-color value correction is carried out on the color gamut difference of the color gamut of the projector, so that the three-primary-color values output by adjacent projectors in the fusion area are kept consistent, the consistency of the color and the vividness of the projection splicing fusion image is greatly ensured, and the image distortion rate is reduced.
Drawings
Fig. 1 is a block diagram of a multi-projector frame splicing color combiner according to the present invention;
FIG. 2 is a flow chart of a multi-projector frame splicing color fusion method according to the present invention;
FIG. 3 is a flowchart of a method for obtaining an extreme color gamut value of a projector according to the present invention;
FIG. 4 is a flowchart of a method for obtaining color correction coefficients according to the present invention;
FIG. 5 is a flowchart of a method for correcting geometry of a picture according to the present invention;
FIG. 6 is a flowchart of a method for performing frame stitching according to the present invention;
FIG. 7 is a schematic diagram of the calculated size of the pixel points of the fusion region in the present invention;
fig. 8 is a schematic view of a projection picture after picture splicing in the present invention.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments described below are by way of example only, and other obvious variations will occur to those skilled in the art.
Referring to fig. 1, a multi-projector picture splicing color fuser includes:
the processor is used for processing and dividing the image into at least two projection images with superposition areas, respectively transmitting the projection images to the projectors for projection output, dividing the projection pictures of the projectors into grids, performing picture geometric correction, correcting the grids of the picture superposition areas of the two adjacent projectors, fusing the pictures of the superposition areas of the two adjacent projectors, completing picture splicing, calculating the color value of the two adjacent projectors after the brightness of the pixel points in the fusion area is attenuated, combining the color value of the three primary colors of the projectors with the color gamut of the projectors according to the color value of the two adjacent projectors after the brightness of the pixel points in the fusion area is attenuated, and remapping the output color value of the pixel points of the projectors in the fusion area;
the video signal receiving module is used for receiving an externally input source video signal;
the video signal processing module is electrically connected with the processor and the video signal receiving module and is used for converting the source video signals received by the video signal receiving module into RGB signals and inputting the RGB signals into the processor;
the projection image receiving module is electrically connected with the processor and is used for receiving a projection image and transmitting the projection image to the processor;
and the video signal output module is electrically connected with the processor and is used for outputting the processed video signal to an external projector.
Wherein, the treater includes:
the picture separation module is used for processing and dividing the image into at least two projection images with overlapped areas;
the picture correction module is used for dividing the projection picture of the projector into grids, carrying out picture geometric correction and correcting the grids of the picture coincidence areas of the two adjacent projectors, fusing the pictures of the coincidence areas of the two adjacent projectors and completing picture splicing;
the first calculation module is used for calculating color values of pixels of two adjacent projectors in the fusion area after the brightness of the pixels is attenuated;
and the second calculation module is used for remapping the output color values of the pixels of the projector in the fusion area.
The working process of the multi-projector picture splicing color fusion device is as follows:
the method comprises the following steps: the picture separation module is used for processing and dividing the corrected image into at least two projected images with overlapped areas, and outputting the projected images to a plurality of projectors for projection output through the video signal output module;
step two: the projection picture receiving module acquires a projection image of the correction image;
step three: the picture correction module is used for dividing the projected image of the corrected image into grids, carrying out picture geometric correction and correcting the grids of picture coincidence areas of two adjacent projectors, fusing the pictures of the coincidence areas of the two adjacent projectors and completing picture splicing;
step four: acquiring a red correction coefficient, a green correction coefficient and a blue correction coefficient of adjacent projectors;
step five: the video signal receiving module receives an externally input source video signal;
step six: the video signal processing module converts the source video signal received by the video signal receiving module into RGB signal and inputs the RGB signal into the picture separation module to separate the RGB signal into at least two projection pictures with overlapped regions;
step seven: the first calculation module calculates the color value of the projection image in the fusion area after the brightness of the pixel point is attenuated;
step eight: the second calculation module remaps the output color value of the projector at the pixel point of the fusion area;
step nine: the processor replaces the original color value of the fusion area with the pixel point corresponding to the image fusion area according to the output color value to obtain an image which is the image required to be output by the projector, and a projection output image is obtained;
step ten: the video signal output module is used for outputting the video signal of the projection output picture to an external projector for projection output.
Referring to fig. 2, for further explanation, a multi-projector frame splicing color fusion method is proposed in combination with the multi-projector frame splicing color fusion device, and includes:
processing and dividing the image into at least two projection images with overlapping areas, and respectively transmitting the plurality of projection images to a plurality of projectors for projection output;
adjusting the position of the projector to arrange the plurality of projection images according to the splicing sequence;
dividing a projection picture of the projector into grids, and performing picture geometric correction;
correcting grids of the image coincidence areas of the two adjacent projectors, fusing the images of the image coincidence areas of the two adjacent projectors, and completing image splicing;
performing half attenuation on the brightness of two adjacent projectors in the fusion area, and respectively calculating the color values of the two adjacent projectors after the brightness of pixel points in the fusion area is attenuated;
remapping the output color value of the pixel point of the projector in the fusion area according to the color value of the pixel point of the projector in the fusion area after the brightness attenuation and combining the three-primary-color gamut of the projector;
replacing the original color value of the fusion area with the pixel point corresponding to the image fusion area according to the output color value to obtain an image which is the image required to be output by the projector, and obtaining a projection output image;
outputting projection output pictures by adjacent projectors to complete projection fusion;
the calculation formula for calculating the color value of the projector after the brightness of the pixel point in the fusion area is as follows:
FIG. 7 shows a color value of a projector after brightness attenuation in a blend region, where C is 0 The original color value of the fusion area, H is the width of the fusion area, and H is the distance between the pixel point P and the edge of the projection picture of the projector;
in the scheme, the gradient attenuation algorithm is adopted to calculate the attenuation color value after the brightness attenuation of the projection splicing fusion region is calculated, so that the projector can perform smooth transition between the overlapping region and the non-overlapping region, and the uniformity of the spliced picture is effectively ensured;
the calculation formula for remapping the output color values of the projector at the pixel points of the fusion area is as follows:
in the formula, R, G and B are output red color values, output green color values and output blue color values of pixel points of the projector in the fusion area;
R max 、R min the maximum value and the minimum value of the red color gamut of the projector are obtained;
G max 、G min the maximum value and the minimum value of the green color gamut of the projector;
B max 、B min the maximum value and the minimum value of the blue color gamut of the projector;
R 0 、G 0 、B 0 the brightness of the projector in the fusion area is attenuated to obtain a red color value, a green color value and a blue color value;
δ 1 、δ 2 、δ 3 the correction coefficients of the projector are red correction coefficient, green correction coefficient and blue correction coefficient.
Because the projector generally cannot output the color values of the three primary colors from 0 to 255, it is necessary to remap the color with the attenuated luminance, where any color is composed of the three primary colors of red, green and blue, and the color with the attenuated luminance is the remapped three primary colors.
In the scheme, the three primary color values are corrected according to the color gamut difference of the color gamuts of the projectors, so that the three primary color values output by the adjacent projectors in the fusion area are kept consistent, the consistency of the colors and the vividness of the projection splicing fusion picture is greatly ensured, the picture distortion rate is reduced, and the splicing effect of the projection picture is greatly ensured.
Referring to FIG. 3, R of the projector max 、R min Or G max 、G min Or B max 、B min The acquisition method comprises the following steps:
the projector outputs a picture with (255.0.0) or (0.255.0) or (0.0.255) color values, the red color value or the green color value or the blue color value is gradually reduced, and when the color of the picture begins to change, the current red color value or the green color value or the blue color value is recorded, namely the R value of the projector max Or G max Or B max ；
Continuously reducing the red color value or the green color value or the blue color value, and recording the current red color value or the green color value or the blue color value when the picture color changes into black, namely the R value of the projector min Or G min Or B min 。
Please refer to fig. 4, delta 1 、δ 2 、δ 3 The acquisition method comprises the following steps:
half of the brightness of two adjacent projectors in the fusion area after the picture splicing is finished is attenuated, and the two projectors are controlled to output pictures with (255.0.0) or (0.255.0) or (0.0.255) color values;
calculating color values of two adjacent projectors after the brightness of pixel points in the fusion area is attenuated;
substituting the color value of the attenuated brightness of the pixel point of the projector in the fusion area into a calculation formula for remapping the output color value of the pixel point of the projector in the fusion area,and gradually adjusting delta between two adjacent projectors 1 、δ 2 、δ 3 The colors of the fusion area and the non-fusion area in the projection picture are consistent, and delta at the moment is recorded 1 、δ 2 、δ 3 Namely the red correction coefficient, the green correction coefficient and the blue correction coefficient of the projector.
When the color value correction coefficient is calculated, the method leads
Wherein δ may be δ 1 、δ 2 Or delta 3 Setting the initial value of sigma to 10, then gradually decreasing sigma with a gradient of 0.01 until the color of the fused area and the non-fused area in the projection picture is consistent, recording delta 1 、δ 2 Or delta 3 Namely the red correction coefficient, the green correction coefficient and the blue correction coefficient of the projector.
Referring to fig. 5, the geometric correction of the picture specifically includes the following steps:
recording output pictures of two adjacent projectors as a first projection picture and a second projection picture respectively;
dividing the first projection picture and the second projection picture into grids with the transverse number of N and the longitudinal number of M, wherein the intersection positions of transverse lines and vertical lines are used as vertexes, four vertexes of four corners of the first projection picture are A0, A1, A2 and A3, and four vertexes of four corners of the second projection picture are B0, B1, B2 and B3;
moving the positions of the vertexes A0, A1, A2, A3, B0, B1, B2 and B3 so that A1A2 and B1B2 are kept on the same straight line, A0A3 and B0B3 are kept on the same straight line, and the sizes of the first projection and the second projection are kept consistent;
and finishing the geometric correction of the picture.
According to the theory of imaging, a set of vertices of an arbitrary shape is called a mesh. The image is a rectangular picture, and the purpose of changing the picture display area can be realized by a method of redrawing the grid by adjusting the vertex coordinates of the rectangular picture.
In order to realize the alignment and splicing of adjacent pictures of the projector, the lower left corner of each picture is taken as a coordinate origin, four corners of the lower left corner, the upper right corner and the lower right corner of each picture are used for forming a four-corner area, then the four-corner area is subjected to grid division, the positions of four corners of a grid are adjusted, the sizes of the adjacent pictures of the projector are consistent, and the geometric correction of the pictures can be completed.
Referring to fig. 6, the completion of the frame splicing specifically includes the following steps:
moving the vertexes inside the overlapping areas in the first projection picture and the second projection picture so as to enable the vertexes of the overlapping areas in the first projection picture and the second projection picture to be overlapped;
moving vertexes in the non-overlapped region in the first projection picture and the second projection picture to enable the vertexes in the first projection picture and the second projection picture to be uniformly distributed;
and finishing picture splicing.
Adjusting the vertexes of the overlapping areas of the adjacent pictures to overlap one by one, then adjusting the coordinates of other vertexes in the grid according to the vertex of the overlapping area of each picture, and drawing and outputting according to the grid of each picture again, so that the correction of the picture can be realized, the purpose that the overlapping areas form a complete picture is achieved, please refer to fig. 8, and the projection picture for completing the picture splicing is shown in fig. 8.
Furthermore, the present disclosure also provides a computer-readable storage medium, on which a computer-readable program is stored, where the computer-readable program, when called, executes the multi-projector picture splicing color fusion method as described above;
it is understood that the storage medium may be a magnetic medium, such as a floppy disk, a hard disk, a magnetic tape; optical media such as DVD; or semiconductor media such as solid state disk SolidStateDisk, SSD, etc.
In summary, the invention has the advantages that the image brightness and the color value of the projection splicing fusion area are calculated by adopting gradient attenuation, so that the consistency of the brightness, the color, the vividness and the uniformity of the whole projection screen picture can be effectively ensured.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A multi-projector picture splicing color fusion method is characterized by comprising the following steps:
processing and dividing the image into at least two projection images with overlapping areas, and respectively transmitting the plurality of projection images to a plurality of projectors for projection output;
adjusting the position of the projector to arrange the plurality of projection images according to the splicing sequence;
dividing a projection picture of the projector into grids, and performing picture geometric correction;
correcting grids of the image coincidence areas of the two adjacent projectors to enable the images of the image coincidence areas of the two adjacent projectors to be fused to complete image splicing;
half of the brightness of two adjacent projectors in the fusion area is attenuated, and color values of the two adjacent projectors after the brightness of pixel points in the fusion area is attenuated are respectively calculated;
remapping the output color value of the pixel point of the projector in the fusion area according to the color value of the pixel point of the projector in the fusion area after the brightness attenuation and combining the three-primary-color gamut of the projector;
replacing the original color value of the fusion area with the pixel point corresponding to the image fusion area according to the output color value to obtain an image which is the image required to be output by the projector, and obtaining a projection output image;
outputting projection output pictures by adjacent projectors to complete projection fusion;
the calculation formula for calculating the color value of the projector after the brightness of the pixel point in the fusion area is as follows:
wherein C is the color value of the projector after the brightness of the fusion area is attenuated, C 0 The original color value of the fusion area, H is the width of the fusion area, and H is the distance from the pixel point to the edge of the projection picture of the projector;
the calculation formula of the output color value of the pixel point of the remapping projector in the fusion area is as follows:
in the formula, R, G and B are output red color values, output green color values and output blue color values of pixel points of the projector in the fusion area;
R max 、R min the maximum value and the minimum value of the red color gamut of the projector;
G max 、G min the maximum value and the minimum value of the green color gamut of the projector;
B max 、B min the maximum value and the minimum value of the blue color gamut of the projector;
R 0 、G 0 、B 0 the brightness of the projector in the fusion area is attenuated to obtain a red color value, a green color value and a blue color value;
δ 1 、δ 2 、δ 3 the correction coefficients of the projector are red correction coefficient, green correction coefficient and blue correction coefficient.
2. The multi-projector picture splicing color blending method according to claim 1, wherein R of the projectors max 、R min Or G max 、G min Or B max 、B min The acquisition method comprises the following steps:
the projector outputs a picture with (255.0.0) or (0.255.0) or (0.0.255) color value, gradually reduces the red color value or the green color value or the blue color value, and records the current red color value or the green color value or the blue color value when the color of the picture begins to change, namely the R value of the projector max Or G max Or B max ；
Continuously reducing the red color value or the green color value or the blue color value, and recording the current red color value or the green color value or the blue color value when the picture color is changed into black, namely the R value of the projector min Or G min Or B min 。
3. The multi-projector frame splicing color blending method according to claim 2, wherein δ is 1 、δ 2 、δ 3 The acquisition method comprises the following steps:
half of the brightness of two adjacent projectors in the fusion area after the picture splicing is finished is attenuated, and the two projectors are controlled to output pictures with (255.0.0) or (0.255.0) or (0.0.255) color values;
calculating color values of two adjacent projectors after the brightness of pixel points in the fusion area is attenuated;
substituting the color value of the attenuated pixel brightness of the projector in the fusion area into a calculation formula for remapping the output color value of the pixel brightness of the projector in the fusion area, and gradually adjusting the delta of two adjacent projectors 1 、δ 2 、δ 3 The colors of the fusion area and the non-fusion area in the projection picture are consistent, and delta at the moment is recorded 1 、δ 2 、δ 3 Namely the red correction coefficient, the green correction coefficient and the blue correction coefficient of the projector.
4. The method according to claim 3, wherein the performing of the picture geometry correction specifically comprises the following steps:
respectively recording output pictures of two adjacent projectors as a first projection picture and a second projection picture;
dividing the first projection picture and the second projection picture into grids with the transverse number of N and the longitudinal number of M, wherein the intersection positions of transverse lines and vertical lines are used as vertexes, four vertexes of four corners of the first projection picture are A0, A1, A2 and A3, and four vertexes of four corners of the second projection picture are B0, B1, B2 and B3;
moving the positions of the vertexes A0, A1, A2, A3, B0, B1, B2 and B3 so that A1A2 and B1B2 are kept on the same straight line, A0A3 and B0B3 are kept on the same straight line, and the sizes of the first projection and the second projection are kept consistent;
and finishing the geometric correction of the picture.
5. The multi-projector picture splicing color fusion method according to claim 4, wherein the completion of the picture splicing specifically comprises the following steps:
moving the vertexes inside the overlapping areas in the first projection picture and the second projection picture so as to enable the vertexes of the overlapping areas in the first projection picture and the second projection picture to be overlapped;
moving vertexes in the non-overlapped region in the first projection picture and the second projection picture to enable the vertexes in the first projection picture and the second projection picture to be uniformly distributed;
and finishing picture splicing.
6. A multi-projector picture-stitching color fuser for implementing the multi-projector picture-stitching color fusing method according to any one of claims 1 to 5, comprising:
the processor is used for processing and dividing the image into at least two projection images with coincident regions, respectively transmitting the projection images to the projectors for projection output, dividing the projection pictures of the projectors into grids, performing picture geometric correction, correcting the grids of the picture coincident regions of the two adjacent projectors, fusing the pictures of the coincident regions of the two adjacent projectors, completing picture splicing, calculating the color value of the two adjacent projectors after the brightness of the pixel points in the fusion region is attenuated, combining the color value of the three primary colors of the projectors with the color gamut of the projectors according to the color value of the two adjacent projectors after the brightness of the pixel points in the fusion region is attenuated, and remapping the output color value of the pixel points of the projectors in the fusion region;
the video signal receiving module is used for receiving an externally input source video signal;
the video signal processing module is electrically connected with the processor and the video signal receiving module and is used for converting the source video signals received by the video signal receiving module into RGB signals and inputting the RGB signals into the processor;
the projection picture receiving module is electrically connected with the processor and is used for receiving a projection image and transmitting the projection image to the processor;
and the video signal output module is electrically connected with the processor and is used for outputting the processed video signal to an external projector.
7. The multi-projector frame splicing color fuser according to claim 6, wherein the processor comprises:
the picture separation module is used for processing and dividing the image into at least two projection images with overlapped areas;
the picture correction module is used for dividing the projection picture of the projector into grids, carrying out picture geometric correction and correcting the grids of the picture coincidence areas of the two adjacent projectors, fusing the pictures of the coincidence areas of the two adjacent projectors and completing picture splicing;
the first calculation module is used for calculating color values of attenuated pixel point brightness of two adjacent projectors in the fusion area;
and the second calculation module is used for remapping the output color value of the pixel point of the projector in the fusion area.
8. A computer-readable storage medium, having a computer-readable program stored thereon, which when invoked, performs the multi-projector picture-splicing color fusion method according to any one of claims 1 to 5.
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Denomination of invention: A color fusion method, fusion device, and storage medium for multi projector image splicing Effective date of registration: 20231116 Granted publication date: 20230623 Pledgee: Industrial and Commercial Bank of China Limited Guangzhou Industrial Avenue sub branch Pledgor: Guangzhou Zhisheng Digital Technology Co.,Ltd. Registration number: Y2023980065740 |