CN109285116B - Projection seamless splicing fusion method, projection equipment and projection system - Google Patents

Projection seamless splicing fusion method, projection equipment and projection system Download PDF

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CN109285116B
CN109285116B CN201810953422.9A CN201810953422A CN109285116B CN 109285116 B CN109285116 B CN 109285116B CN 201810953422 A CN201810953422 A CN 201810953422A CN 109285116 B CN109285116 B CN 109285116B
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CN109285116A (en
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钟波
肖适
刘志明
肖海军
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Chengdu Jimi Technology Co Ltd
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    • G06T3/40—Scaling of whole images or parts thereof, e.g. expanding or contracting
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Abstract

The invention relates to the technical field of large-screen projection splicing, in particular to a projection seamless splicing fusion method, projection equipment and a projection system. The projection device receives the input image and the projection splicing parameter, calculates the fusion zone size of the segmented image, the size of the segmented image and the starting point coordinates of the segmented image according to the input image parameter, the projection splicing parameter and the projection device parameter, cuts the input image to obtain the segmented image and outputs the segmented image, achieves the effect of carrying out projection picture segmentation and output by taking the projection device as a hard fusion device, does not need an external hardware splicing fusion device, does not need additional splicing software, and has high cost performance and convenient debugging.

Description

Projection seamless splicing fusion method, projection equipment and projection system
Technical Field
The invention relates to the technical field of large-screen projection splicing, in particular to a projection seamless splicing fusion method, projection equipment and a projection system.
Background
The projection seamless splicing fusion technology is that two or more projection pictures are subjected to edge overlapping, brightness and color treatment are carried out on a fusion belt through geometric correction and color correction, and finally, a whole picture which has no gap, larger picture and higher resolution is formed on a projection large screen.
At present, two general splicing fusion schemes exist on the market, one is a splicing fusion device with external hardware, commonly called as hard fusion, the hardware splicing fusion device is used for completing the segmentation of projection images, the fusion belt is generated, and the fusion belt is processed through geometric correction and color correction, so that the defect of high cost is overcome.
The scheme is also a splicing and fusion scheme of pure software, commonly called as soft fusion, and the scheme has the cost advantage compared with a hardware fusion scheme by a distributed mode of a plurality of servers or PC frameworks when a plurality of spliced machines are arranged in a mode of servers or PCs and multiple display cards, but has the defects of poor stability, picture asynchronization, blocking and the like.
Compared with the two schemes of hard fusion and soft fusion, the projection device serving as the display terminal is only used for display.
Disclosure of Invention
In view of this, the present application provides a projection seamless splice fusion method, apparatus and system. The method is characterized in that the projection equipment is used as a hard fusion device, an external hardware splicing fusion device is not needed, additional splicing software is not needed, the projection equipment is used for dividing pictures, fusion belts are generated, then geometric correction, brightness and color processing of the projection equipment are utilized, the realization of a seamless splicing fusion technology is completed, and the whole complete picture with higher brightness and larger resolution is presented.
In order to solve the technical problems, the technical scheme provided by the invention is a projection seamless splicing and fusion method which is applied to projection equipment, and the method comprises the following steps:
receiving an input image, and acquiring the resolution width and the resolution height of the input image;
acquiring the number of rows of a projection splicing matrix, the number of columns of the projection splicing matrix, the number of rows of splicing positions and the number of columns of splicing positions;
acquiring a projection device resolution width, a projection device resolution height, a preset projection device horizontal fusion zone width and a preset projection device vertical fusion zone height;
calculating the width of the horizontal fusion zone of the segmented image, the height of the vertical fusion zone of the segmented image, the width of the segmented image, the height of the segmented image and the starting point coordinates of the segmented image according to the acquired data;
dividing an input image according to the start point coordinates of the divided image, the width of the divided image and the height of the divided image to generate a divided image;
outputting the segmented image.
Further, the method for calculating the horizontal fusion zone width of the segmented image, the vertical fusion zone height of the segmented image, the width of the segmented image, the height of the segmented image and the starting point coordinates of the segmented image according to the acquired data comprises the following steps:
calculating the width of the horizontal fusion zone of the segmented image according to the width of the horizontal fusion zone of the preset projection equipment, the width of the resolution of the projection equipment, the number of columns of the projection splicing matrix and the width of the resolution of the input image;
calculating the height of the vertical fusion zone of the segmented image according to the height of the vertical fusion zone of the preset projection equipment, the resolution height of the projection equipment, the number of rows of the projection splicing matrix and the resolution height of the input image;
calculating the width of the segmented image according to the resolution width of the input image, the number of columns of the projection stitching matrix and the width of the horizontal fusion zone of the segmented image;
calculating the height of the segmented image according to the resolution height of the input image, the number of rows of the projection stitching matrix and the height of the vertical fusion zone of the segmented image;
calculating the abscissa of the starting point coordinate of the segmented image according to the resolution width of the input image, the number of columns of the projection stitching matrix, the number of columns of the stitching position and the width of the horizontal fusion zone of the segmented image;
and calculating the ordinate of the starting point coordinate of the segmented image according to the resolution height of the input image, the number of lines of the projection stitching matrix, the number of lines of the stitching positions and the vertical fusion belt height of the segmented image.
Further, the method for calculating the width of the horizontal fusion zone of the segmented image according to the width of the horizontal fusion zone of the preset projection device, the width of the resolution of the projection device, the number of columns of the projection splicing matrix and the width of the resolution of the input image comprises the following steps:
split image horizontal fusion zone width = preset projection device horizontal fusion zone width/(projection device resolution width x projection splice matrix column number-preset projection device horizontal fusion zone width x (projection splice matrix column number-1))xinput image resolution width;
the method for calculating the vertical fusion zone height of the segmented image according to the preset vertical fusion zone height of the projection equipment, the resolution height of the projection equipment, the number of rows of the projection splicing matrix and the resolution height of the input image comprises the following steps:
split image vertical fusion zone height = preset projection device vertical fusion zone height/(projection device resolution height x projection splice matrix row number-preset projection device vertical fusion zone height (projection splice matrix row number-1))xinput image resolution height.
Further, the method for calculating the width of the segmented image according to the resolution width of the input image, the number of columns of the projection splicing matrix and the width of the horizontal fusion zone of the segmented image comprises the following steps:
judging whether the number of columns of the splicing position is equal to 1 or equal to the number of columns of the projection splicing matrix, if so, calculating the width of the segmented image = the width of the resolution of the input image/the number of columns of the projection splicing matrix + the width of the horizontal fusion zone of the segmented image/the number of columns of the projection splicing matrix, if not, calculating the width of the segmented image = the width of the resolution of the input image/the number of columns of the projection splicing matrix + (the number of columns of the projection splicing matrix + 1) the width of the horizontal fusion zone of the segmented image/the number of columns of the projection splicing matrix;
the method for calculating the height of the segmented image according to the resolution height of the input image, the number of rows of the projection splicing matrix and the height of the vertical fusion zone of the segmented image comprises the following steps:
and judging whether the number of the lines of the splicing positions is equal to 1 or equal to the number of the lines of the projection splicing matrix, if so, calculating the height of the split image=the resolution height of the input image/the number of the lines of the projection splicing matrix+the height of the vertical fusion zone of the split image/the number of the lines of the projection splicing matrix, and if not, calculating the height of the split image=the resolution height of the input image/the number of the lines of the projection splicing matrix+ (the number of the lines of the projection splicing matrix+1) the height of the vertical fusion zone of the split image/the number of the lines of the projection splicing matrix.
Further, the method for calculating the abscissa of the starting point coordinate of the segmented image according to the resolution width of the input image, the number of columns of the projection splicing matrix, the number of columns of the splicing position and the width of the horizontal fusion zone of the segmented image comprises the following steps:
judging whether the number of the columns of the splicing positions is equal to 1, if so, calculating the abscissa=0 of the starting point coordinates of the segmented image, and if not, calculating the abscissa= (input image resolution width+segmented image horizontal fusion zone width)/projection splicing matrix number of columns (number of the columns of the splicing positions-1) -segmented image horizontal fusion zone width+1 of the starting point coordinates of the segmented image;
the method for calculating the ordinate of the starting point coordinate of the segmented image according to the resolution height of the input image, the number of lines of the projection splicing matrix, the number of lines of the splicing position and the height of the vertical fusion zone of the segmented image comprises the following steps:
judging whether the number of the lines of the splicing positions is equal to 1, if so, calculating the ordinate=0 of the starting point coordinates of the segmented image, and if not, calculating the ordinate= (the resolution height of the input image + the vertical fusion zone height of the segmented image)/the number of the lines of the projection splicing matrix (the number of the lines of the splicing positions-1) -the vertical fusion zone height of the segmented image +1;
the number of the rows of the splicing positions and the number of the columns of the splicing positions are natural numbers from 1.
Further, between the step of generating the divided image and the step of outputting the divided image, the method further comprises:
geometrically correcting the segmented image;
color correction and brightness correction are performed on the horizontal blend belt and/or the vertical blend belt in the split image.
The present invention also provides a projection apparatus, the apparatus comprising:
the image input processing module is used for receiving an input image and acquiring the resolution width and the resolution height of the input image;
the splicing parameter acquisition module is used for acquiring the number of rows of the projection splicing matrix, the number of columns of the projection splicing matrix, the number of rows of splicing positions and the number of columns of splicing positions;
the device parameter acquisition module is used for acquiring the resolution width of the projection device, the resolution height of the projection device, the width of a preset horizontal fusion zone of the projection device and the height of a preset vertical fusion zone of the projection device;
the segmented image parameter calculation module is used for calculating the width of the horizontal fusion zone of the segmented image, the height of the vertical fusion zone of the segmented image, the width of the segmented image, the height of the segmented image and the starting point coordinates of the segmented image according to the acquired data;
the segmented image generation module is used for generating a segmented image by segmenting the input image according to the starting point coordinates of the segmented image, the width of the segmented image and the height of the segmented image;
and the segmented image output module is used for outputting the segmented image.
Further, the segmented image parameter calculation module includes:
the split image horizontal fusion zone width calculation unit is used for calculating the split image horizontal fusion zone width according to the preset projection equipment horizontal fusion zone width, the projection equipment resolution width, the projection splicing matrix column number and the input image resolution width;
the split image vertical fusion zone height calculating unit is used for calculating the split image vertical fusion zone height according to the preset projection equipment vertical fusion zone height, the projection equipment resolution height, the projection splicing matrix line number and the input image resolution height;
the split image width calculation unit is used for calculating the width of the split image according to the resolution width of the input image, the number of columns of the projection splicing matrix and the width of the horizontal fusion zone of the split image;
the split image height calculating unit is used for calculating the height of the split image according to the resolution height of the input image, the number of rows of the projection splicing matrix and the vertical fusion zone height of the split image;
the abscissa calculating unit is used for calculating the abscissa of the starting point coordinate of the segmented image according to the resolution width of the input image, the number of columns of the projection splicing matrix, the number of columns of the splicing position and the width of the horizontal fusion belt of the segmented image;
and the ordinate calculating unit is used for calculating the ordinate of the starting point coordinate of the segmented image according to the resolution height of the input image, the number of rows of the projection splicing matrix, the number of rows of the splicing position and the vertical fusion belt height of the segmented image.
Further, the method for calculating the width of the horizontal fusion zone of the segmented image by the segmented image horizontal fusion zone width calculating unit according to the width of the horizontal fusion zone of the preset projection device, the width of the resolution of the projection device, the number of columns of the projection splicing matrix and the width of the resolution of the input image comprises the following steps:
split image horizontal fusion zone width = preset projection device horizontal fusion zone width/(projection device resolution width x projection splice matrix column number-preset projection device horizontal fusion zone width x (projection splice matrix column number-1))xinput image resolution width;
the method for calculating the vertical fusion zone height of the segmented image by the vertical fusion zone height calculation unit of the segmented image according to the preset vertical fusion zone height of the projection equipment, the resolution height of the projection equipment, the number of rows of the projection splicing matrix and the resolution height of the input image comprises the following steps:
split image vertical fusion zone height = preset projection device vertical fusion zone height/(projection device resolution height x projection splice matrix row number-preset projection device vertical fusion zone height (projection splice matrix row number-1))xinput image resolution height.
Further, the method for calculating the width of the segmented image by the segmented image width calculating unit according to the resolution width of the input image, the number of projection splicing matrix columns and the width of the horizontal fusion zone of the segmented image comprises the following steps:
judging whether the number of columns of the splicing position is equal to 1 or equal to the number of columns of the projection splicing matrix, if so, calculating the width of the segmented image = the width of the resolution of the input image/the number of columns of the projection splicing matrix + the width of the horizontal fusion zone of the segmented image/the number of columns of the projection splicing matrix, if not, calculating the width of the segmented image = the width of the resolution of the input image/the number of columns of the projection splicing matrix + (the number of columns of the projection splicing matrix + 1) the width of the horizontal fusion zone of the segmented image/the number of columns of the projection splicing matrix;
the method for calculating the height of the segmented image by the segmented image height calculating unit according to the resolution height of the input image, the number of rows of the projection splicing matrix and the vertical fusion zone height of the segmented image comprises the following steps:
and judging whether the number of the lines of the splicing positions is equal to 1 or equal to the number of the lines of the projection splicing matrix, if so, calculating the height of the split image=the resolution height of the input image/the number of the lines of the projection splicing matrix+the height of the vertical fusion zone of the split image/the number of the lines of the projection splicing matrix, and if not, calculating the height of the split image=the resolution height of the input image/the number of the lines of the projection splicing matrix+ (the number of the lines of the projection splicing matrix+1) the height of the vertical fusion zone of the split image/the number of the lines of the projection splicing matrix.
Further, the method for calculating the abscissa of the starting point coordinate of the segmented image by the abscissa calculating unit according to the resolution width of the input image, the number of columns of the projection splicing matrix, the number of columns of the splicing position and the width of the horizontal fusion belt of the segmented image includes:
judging whether the number of the columns of the splicing positions is equal to 1, if so, calculating the abscissa=0 of the starting point coordinates of the segmented image, and if not, calculating the abscissa= (input image resolution width+segmented image horizontal fusion zone width)/projection splicing matrix number of columns (number of the columns of the splicing positions-1) -segmented image horizontal fusion zone width+1 of the starting point coordinates of the segmented image;
the method for calculating the ordinate of the starting point coordinate of the segmented image by the ordinate calculation unit according to the resolution height of the input image, the number of rows of the projection splicing matrix, the number of rows of the splicing position and the vertical fusion belt height of the segmented image comprises the following steps:
judging whether the number of the lines of the splicing positions is equal to 1, if so, calculating the ordinate=0 of the starting point coordinates of the segmented image, and if not, calculating the ordinate= (the resolution height of the input image + the vertical fusion zone height of the segmented image)/the number of the lines of the projection splicing matrix (the number of the lines of the splicing positions-1) -the vertical fusion zone height of the segmented image +1;
the number of the rows of the splicing positions and the number of the columns of the splicing positions are natural numbers from 1.
Further, the device also comprises a segmentation image correction module, which is used for carrying out geometric correction on the segmentation image; color correction and brightness correction are performed on the horizontal blend belt and/or the vertical blend belt in the split image.
The invention also provides a projection system which comprises at least 2 projection devices.
Compared with the prior art, the application has the following beneficial effects: the projection device receives the input image and the projection splicing parameter, calculates the fusion zone size of the segmented image, the size of the segmented image and the starting point coordinates of the segmented image according to the input image parameter, the projection splicing parameter and the projection device parameter, cuts the input image to obtain the segmented image and outputs the segmented image, achieves the effect of carrying out projection picture segmentation and output by taking the projection device as a hard fusion device, does not need an external hardware splicing fusion device, does not need additional splicing software, and has high cost performance and convenient debugging.
Drawings
Fig. 1 is a schematic diagram of a projection seamless splicing fusion method according to a first embodiment of the present invention;
fig. 2 is a schematic diagram of a projection apparatus according to a second embodiment of the present invention;
fig. 3 is a schematic view illustrating a projection system according to a third embodiment of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, a first embodiment of the present invention provides a projection seamless splicing and fusion method, which is applied to a projection device, and the method includes:
s11: receiving an input image, and acquiring the resolution width and the resolution height of the input image;
s12: acquiring the number of rows of a projection splicing matrix, the number of columns of the projection splicing matrix, the number of rows of splicing positions and the number of columns of splicing positions;
s13: acquiring a projection device resolution width, a projection device resolution height, a preset projection device horizontal fusion zone width and a preset projection device vertical fusion zone height;
s2: calculating the width of the horizontal fusion zone of the segmented image, the height of the vertical fusion zone of the segmented image, the width of the segmented image, the height of the segmented image and the starting point coordinates of the segmented image according to the acquired data;
s3: dividing an input image according to the start point coordinates of the divided image, the width of the divided image and the height of the divided image to generate a divided image;
s4: outputting the segmented image.
In step S2, a method for calculating a horizontal fusion belt width of a divided image, a vertical fusion belt height of the divided image, a width of the divided image, a height of the divided image, and a start point coordinate of the divided image according to the acquired data includes:
s21, calculating the width of the horizontal fusion zone of the segmented image according to the width of the horizontal fusion zone of the preset projection equipment, the width of the resolution of the projection equipment, the number of columns of the projection splicing matrix and the width of the resolution of the input image; calculating the height of the vertical fusion zone of the segmented image according to the height of the vertical fusion zone of the preset projection equipment, the resolution height of the projection equipment, the number of rows of the projection splicing matrix and the resolution height of the input image;
s22: calculating the width of the segmented image according to the resolution width of the input image, the number of columns of the projection stitching matrix and the width of the horizontal fusion zone of the segmented image; calculating the height of the segmented image according to the resolution height of the input image, the number of rows of the projection stitching matrix and the height of the vertical fusion zone of the segmented image;
s23: calculating the abscissa of the starting point coordinate of the segmented image according to the resolution width of the input image, the number of columns of the projection stitching matrix, the number of columns of the stitching position and the width of the horizontal fusion zone of the segmented image; and calculating the ordinate of the starting point coordinate of the segmented image according to the resolution height of the input image, the number of lines of the projection stitching matrix, the number of lines of the stitching positions and the vertical fusion belt height of the segmented image.
Specifically, in step S21, the method for calculating the width of the horizontal fusion zone of the segmented image according to the width of the horizontal fusion zone of the preset projection device, the width of the resolution of the projection device, the number of columns of the projection splicing matrix and the width of the resolution of the input image includes: split image horizontal fusion zone width = preset projection device horizontal fusion zone width/(projection device resolution width x projection splice matrix column number-preset projection device horizontal fusion zone width x (projection splice matrix column number-1))xinput image resolution width.
In step S21, the method for calculating the vertical fusion zone height of the segmented image according to the preset vertical fusion zone height of the projection device, the resolution height of the projection device, the number of rows of the projection splicing matrix and the resolution height of the input image includes: split image vertical fusion zone height = preset projection device vertical fusion zone height/(projection device resolution height x projection splice matrix row number-preset projection device vertical fusion zone height (projection splice matrix row number-1))xinput image resolution height.
Specifically, in step S22, the method for calculating the width of the segmented image according to the resolution width of the input image, the number of columns of the projection stitching matrix, and the width of the horizontal fusion zone of the segmented image includes: judging whether the number of columns of the splicing position is equal to 1 or equal to the number of columns of the projection splicing matrix, if so, calculating the width of the segmented image=the width of the resolution of the input image/the number of columns of the projection splicing matrix+the width of the horizontal fusion zone of the segmented image/the number of columns of the projection splicing matrix, and if not, calculating the width of the segmented image=the width of the resolution of the input image/the number of columns of the projection splicing matrix + (the number of columns of the projection splicing matrix+1) the width of the horizontal fusion zone of the segmented image/the number of columns of the projection splicing matrix.
In step S22, the method for calculating the height of the split image according to the resolution height of the input image, the number of rows of the projection split matrix and the vertical fusion zone height of the split image includes: and judging whether the number of the lines of the splicing positions is equal to 1 or equal to the number of the lines of the projection splicing matrix, if so, calculating the height of the split image=the resolution height of the input image/the number of the lines of the projection splicing matrix+the height of the vertical fusion zone of the split image/the number of the lines of the projection splicing matrix, and if not, calculating the height of the split image=the resolution height of the input image/the number of the lines of the projection splicing matrix+ (the number of the lines of the projection splicing matrix+1) the height of the vertical fusion zone of the split image/the number of the lines of the projection splicing matrix.
Specifically, in step S23, the method for calculating the abscissa of the starting point coordinate of the split image according to the resolution width of the input image, the number of columns of the projection split matrix, the number of columns of the split position and the width of the horizontal fusion zone of the split image includes: and judging whether the number of the columns of the splicing positions is equal to 1, if so, calculating the abscissa=0 of the starting point coordinates of the segmented image, and if not, calculating the abscissa= (input image resolution width+segmented image horizontal fusion zone width)/projection splicing matrix number of columns (number of the columns of the splicing positions-1) -segmented image horizontal fusion zone width+1 of the starting point coordinates of the segmented image.
In step S23, the method for calculating the ordinate of the start coordinate of the split image according to the resolution height of the input image, the number of rows of the projection split matrix, the number of rows of the split positions and the vertical fusion belt height of the split image includes: judging whether the number of the lines of the splicing positions is equal to 1, if so, calculating the ordinate=0 of the starting point coordinates of the segmented image, and if not, calculating the ordinate= (input image resolution height+segmented image vertical fusion zone height)/the number of the lines of the projection splicing matrix (the number of the lines of the splicing positions-1) -the segmented image vertical fusion zone height +1 of the starting point coordinates of the segmented image.
It should be noted that, the projection seamless splicing fusion method between the step S3 and the step S4 further includes: the segmented image is geometrically corrected and the horizontal and/or vertical fusion bands in the segmented image are color corrected and brightness corrected.
It should be noted that, the regions of the fusion zone of the adjacent projection devices are completely overlapped by geometric correction, and then gamma, black and white levels and the like are processed on the fusion zone regions, so that the brightness and color of the fusion zone are basically consistent with those of the non-fusion zone, and finally a seamless complete picture is presented.
As shown in fig. 2, an embodiment of the present invention further provides a projection apparatus, including:
the image input processing module is used for receiving an input image and acquiring the resolution width and the resolution height of the input image;
the splicing parameter acquisition module is used for acquiring the number of rows of the projection splicing matrix, the number of columns of the projection splicing matrix, the number of rows of splicing positions and the number of columns of splicing positions;
the device parameter acquisition module is used for acquiring the resolution width of the projection device, the resolution height of the projection device, the width of a preset horizontal fusion zone of the projection device and the height of a preset vertical fusion zone of the projection device;
the segmented image parameter calculation module is used for calculating the width of the horizontal fusion zone of the segmented image, the height of the vertical fusion zone of the segmented image, the width of the segmented image, the height of the segmented image and the starting point coordinates of the segmented image according to the acquired data;
the segmented image generation module is used for generating a segmented image by segmenting the input image according to the starting point coordinates of the segmented image, the width of the segmented image and the height of the segmented image;
and the segmented image output module is used for outputting the segmented image.
It should be noted that the segmented image parameter calculation module includes:
the split image horizontal fusion zone width calculation unit is used for calculating the split image horizontal fusion zone width according to the preset projection equipment horizontal fusion zone width, the projection equipment resolution width, the projection splicing matrix column number and the input image resolution width;
the split image vertical fusion zone height calculating unit is used for calculating the split image vertical fusion zone height according to the preset projection equipment vertical fusion zone height, the projection equipment resolution height, the projection splicing matrix line number and the input image resolution height;
the split image width calculation unit is used for calculating the width of the split image according to the resolution width of the input image, the number of columns of the projection splicing matrix and the width of the horizontal fusion zone of the split image;
the split image height calculating unit is used for calculating the height of the split image according to the resolution height of the input image, the number of rows of the projection splicing matrix and the vertical fusion zone height of the split image;
the abscissa calculating unit is used for calculating the abscissa of the starting point coordinate of the segmented image according to the resolution width of the input image, the number of columns of the projection splicing matrix, the number of columns of the splicing position and the width of the horizontal fusion belt of the segmented image;
and the ordinate calculating unit is used for calculating the ordinate of the starting point coordinate of the segmented image according to the resolution height of the input image, the number of rows of the projection splicing matrix, the number of rows of the splicing position and the vertical fusion belt height of the segmented image.
Specifically, the method for calculating the width of the horizontal fusion zone of the segmented image by the segmented image horizontal fusion zone width calculating unit according to the width of the horizontal fusion zone of the preset projection device, the width of the resolution of the projection device, the number of columns of the projection splicing matrix and the width of the resolution of the input image comprises the following steps: split image horizontal fusion zone width = preset projection device horizontal fusion zone width/(projection device resolution width x projection splice matrix column number-preset projection device horizontal fusion zone width x (projection splice matrix column number-1))xinput image resolution width;
the method for calculating the vertical fusion zone height of the segmented image by the vertical fusion zone height calculation unit of the segmented image according to the preset vertical fusion zone height of the projection equipment, the resolution height of the projection equipment, the number of rows of the projection splicing matrix and the resolution height of the input image comprises the following steps:
split image vertical fusion zone height = preset projection device vertical fusion zone height/(projection device resolution height x projection splice matrix row number-preset projection device vertical fusion zone height (projection splice matrix row number-1))xinput image resolution height.
Specifically, the method for calculating the width of the segmented image by the segmented image width calculating unit according to the resolution width of the input image, the number of columns of the projection splicing matrix and the width of the horizontal fusion zone of the segmented image includes:
judging whether the number of columns of the splicing position is equal to 1 or equal to the number of columns of the projection splicing matrix, if so, calculating the width of the segmented image = the width of the resolution of the input image/the number of columns of the projection splicing matrix + the width of the horizontal fusion zone of the segmented image/the number of columns of the projection splicing matrix, if not, calculating the width of the segmented image = the width of the resolution of the input image/the number of columns of the projection splicing matrix + (the number of columns of the projection splicing matrix + 1) the width of the horizontal fusion zone of the segmented image/the number of columns of the projection splicing matrix;
the method for calculating the height of the segmented image by the segmented image height calculating unit according to the resolution height of the input image, the number of rows of the projection splicing matrix and the vertical fusion zone height of the segmented image comprises the following steps:
and judging whether the number of the lines of the splicing positions is equal to 1 or equal to the number of the lines of the projection splicing matrix, if so, calculating the height of the split image=the resolution height of the input image/the number of the lines of the projection splicing matrix+the height of the vertical fusion zone of the split image/the number of the lines of the projection splicing matrix, and if not, calculating the height of the split image=the resolution height of the input image/the number of the lines of the projection splicing matrix+ (the number of the lines of the projection splicing matrix+1) the height of the vertical fusion zone of the split image/the number of the lines of the projection splicing matrix.
Specifically, the method for calculating the abscissa of the starting point coordinate of the segmented image by the abscissa calculating unit according to the resolution width of the input image, the number of columns of the projection splicing matrix, the number of columns of the splicing position and the width of the horizontal fusion belt of the segmented image includes: and judging whether the number of the columns of the splicing positions is equal to 1, if so, calculating the abscissa=0 of the starting point coordinates of the segmented image, and if not, calculating the abscissa= (input image resolution width+segmented image horizontal fusion zone width)/projection splicing matrix number of columns (number of the columns of the splicing positions-1) -segmented image horizontal fusion zone width+1 of the starting point coordinates of the segmented image.
The method for calculating the ordinate of the starting point coordinate of the segmented image by the ordinate calculation unit according to the resolution height of the input image, the number of rows of the projection splicing matrix, the number of rows of the splicing position and the height of the vertical fusion belt of the segmented image comprises the following steps: judging whether the number of the lines of the splicing positions is equal to 1, if so, calculating the ordinate=0 of the starting point coordinates of the segmented image, and if not, calculating the ordinate= (input image resolution height+segmented image vertical fusion zone height)/the number of the lines of the projection splicing matrix (the number of the lines of the splicing positions-1) -the segmented image vertical fusion zone height +1 of the starting point coordinates of the segmented image.
It should be noted that, the projection device further includes a segmented image correction module, configured to perform geometric correction on the segmented image; color correction and brightness correction are performed on the horizontal blend belt and/or the vertical blend belt in the split image.
Specifically, the regions of the fusion zone of adjacent projection devices are completely overlapped through geometric correction, then gamma, black and white level and the like are processed on the fusion zone regions, so that the brightness and color of the fusion zone are basically consistent with those of the non-fusion zone, and finally a seamless complete picture is presented.
It should be noted that, the projection device described in the present application refers to an electronic device having a projection function, including, but not limited to, a projector.
As shown in fig. 3, a third embodiment of the present invention further provides a projection system, which includes 2 projection devices as described above.
The external signal source (computer/box, etc.) is output to HDMI distributor (1 in/out) through HDMI interface, HDMI distributor inputs two identical pictures to 2 different projection equipments respectively, utilize the scaler of the soc chip of projection equipment to carry out the cutting of picture and the generation of fusion area, through the geometric correction of projection equipment, carry out image and luminance to the fusion area, make the picture of fusion area look basically identical with the picture of non-fusion local area, splice into a seamless complete image picture.
Taking the projection device resolution 1920x1080 and the hdmi signal input 4k (3840 x 2160) as an example, the evolution of the algorithm is described. The projection device resolution width height is labeled (panel_width, panel_height), the HDMI Input signal width height is labeled (input_width, input_height), the preset projection device vertical fusion zone width and the preset projection device horizontal fusion zone height are labeled (overlay_hw, overlay_vw), respectively (here typically set to 15% -20% of the projection device resolution).
Taking a 1x2 or so stitching as an example, to achieve the stitching tape of fig. 3, it is necessary to divide the input image and divide the same screen that is sent to the two projection devices by the HDMI distributor, except that the stitching tape is the same screen portion, the left projection device displays the left portion of the screen, and the right projection device displays the right portion of the screen. Since 1*2 is left and right stitching, the number of lines is less than 2, so only the horizontal stitching belt is used, and the width of the horizontal stitching belt of the split image is calculated as follows: overlay_ IHW =overlay_hw/(panel_width 2-overlay_hw (2-1)) × input_width.
The overlay_ IHW, the overlay_ivw, represents the horizontal and vertical blend zone widths, respectively, that the input image needs to be cut to produce the overlay_hw, the overlay_vw blend zone. Similarly, m×n stitching patterns represent M rows and N columns of the projection stitching array, and when M is less than 2, overlay_ivw=0; when N is less than 2, overlap_ IHW =0, and when M is greater than 2 and/or N is greater than 2, the calculation method is as follows:
Overlap_IHW＝overlap_HW/(panel_width*N-overlap_HW*(N-1))*input_width；
Overlap_IVW＝overlap_VW/(panel_height*M-overlap_VW*(M-1))*input_height。
therefore, the starting point coordinates of the image area intercepted by the left projection device (1, 1) are (0, 0), the width of the image area intercepted is (input_width/2+overlap_IHW/2), and the height is (input_height); starting point coordinates x= (input_width/2+1-overlap_ IHW/2), y=0 of the image area taken by the right projection device (1, 2); the display cut-out image region has a width of (input_width/2+overlap_IHW/2) and a height of (input_height).
And so on, the projection device with the position M x N in the M x N projection splicing mode represents that the projection device is positioned in the M-th row, the N-th column, and M and N are natural numbers starting from 1. output_width represents the divided image width, and output_height represents the divided image height.
When N is the head-to-tail column of the projection splice matrix, i.e., n=1 or n=n, output_width=input_width/n+overlap_ IHW/N; when N is not the head-tail column of the projection splicing matrix, N is not equal to 1, and N is not equal to N, output_width=input_width/n+ (n+1) overlap_ IHW/N, and the width of the middle column is one more overlap_ IHW.
When M is the head-tail line of the projection splicing matrix, namely m=1 or m=m, output_height=input_height/m+overlap_ivw/M; when M is not the head-tail row of the projection splicing matrix, M is not equal to 1, and M is not equal to M, output_height=input_height/m+ (m+1) overlap_IVW/M, and the height of the middle row is one more overlap_IVW.
When N is column 1, the abscissa of the start point of division x=0, and when N is not column 1, x= (input_width+overlap_ IHW)/N (N-1) +1-overlap_ IHW;
when M is the 1 st row, the ordinate y=0 of the start point of division, and when M is not the 1 st row, y= (input_height+overlap_ivw)/M (M-1) +1-overlap_ivw; wherein M, N, m, n is a natural number, and m and n are counted from 1.
The invention principle is that the scaler of the soc chip of the projection equipment is utilized to segment the input image and generate fusion belt, and then the geometric correction of the projection equipment and the color and brightness processing of the fusion belt are utilized to provide a seamless large screen splicing fusion technology with higher cost performance.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that the above-mentioned preferred embodiment should not be construed as limiting the invention, and the scope of the invention should be defined by the appended claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.

Claims (9)

1. A projection seamless splice fusion method applied to projection equipment, the method comprising:
receiving an input image, and acquiring the resolution width and the resolution height of the input image;
acquiring the number of rows of a projection splicing matrix, the number of columns of the projection splicing matrix, the number of rows of splicing positions and the number of columns of splicing positions;
acquiring a projection device resolution width, a projection device resolution height, a preset projection device horizontal fusion zone width and a preset projection device vertical fusion zone height;
calculating a segmented image horizontal fusion zone width, a segmented image vertical fusion zone height, a segmented image width, a segmented image height, and segmented image start point coordinates from the acquired data, comprising: using the formula: the method comprises the steps of calculating the width of a horizontal fusion zone of a segmented image by inputting the width of the horizontal fusion zone of the segmented image = the width of the horizontal fusion zone of a preset projection device/(the width of the resolution of the projection device x the number of columns of projection splicing matrices-the width of the horizontal fusion zone of the preset projection device x (the number of columns of projection splicing matrices-1)); using the formula: the method comprises the steps of calculating a split image vertical fusion zone height by inputting the image resolution height by the split image vertical fusion zone height = preset projection device vertical fusion zone height/(projection device resolution height x projection splice matrix line number-preset projection device vertical fusion zone height x (projection splice matrix line number-1)); calculating the width of the segmented image according to the resolution width of the input image, the number of columns of the projection stitching matrix and the width of the horizontal fusion zone of the segmented image; calculating the height of the segmented image according to the resolution height of the input image, the number of rows of the projection stitching matrix and the height of the vertical fusion zone of the segmented image; calculating the abscissa of the starting point coordinate of the segmented image according to the resolution width of the input image, the number of columns of the projection stitching matrix, the number of columns of the stitching position and the width of the horizontal fusion zone of the segmented image; calculating the ordinate of the starting point coordinate of the segmented image according to the resolution height of the input image, the number of lines of the projection splicing matrix, the number of lines of the splicing position and the height of the vertical fusion zone of the segmented image;
dividing an input image according to the start point coordinates of the divided image, the width of the divided image and the height of the divided image to generate a divided image;
outputting the segmented image.
2. The method of claim 1, wherein the calculating the width of the split image based on the resolution width of the input image, the number of columns of the projection split matrix, and the width of the split image horizontal fusion zone comprises:
judging whether the number of columns of the splicing position is equal to 1 or equal to the number of columns of the projection splicing matrix, if so, calculating the width of the segmented image = the width of the resolution of the input image/the number of columns of the projection splicing matrix + the width of the horizontal fusion zone of the segmented image/the number of columns of the projection splicing matrix, if not, calculating the width of the segmented image = the width of the resolution of the input image/the number of columns of the projection splicing matrix + (the number of columns of the projection splicing matrix + 1) the width of the horizontal fusion zone of the segmented image/the number of columns of the projection splicing matrix;
the method for calculating the height of the segmented image according to the resolution height of the input image, the number of rows of the projection splicing matrix and the height of the vertical fusion zone of the segmented image comprises the following steps:
and judging whether the number of the lines of the splicing positions is equal to 1 or equal to the number of the lines of the projection splicing matrix, if so, calculating the height of the split image=the resolution height of the input image/the number of the lines of the projection splicing matrix+the height of the vertical fusion zone of the split image/the number of the lines of the projection splicing matrix, and if not, calculating the height of the split image=the resolution height of the input image/the number of the lines of the projection splicing matrix+ (the number of the lines of the projection splicing matrix+1) the height of the vertical fusion zone of the split image/the number of the lines of the projection splicing matrix.
3. The method of claim 1, wherein the calculating the abscissa of the start coordinates of the split image according to the resolution width of the input image, the number of columns of the projection split matrix, the number of columns of the split positions, and the width of the horizontal split band of the split image comprises:
judging whether the number of the columns of the splicing positions is equal to 1, if so, calculating the abscissa=0 of the starting point coordinates of the segmented image, and if not, calculating the abscissa= (input image resolution width+segmented image horizontal fusion zone width)/projection splicing matrix number of columns (number of the columns of the splicing positions-1) -segmented image horizontal fusion zone width+1 of the starting point coordinates of the segmented image;
the method for calculating the ordinate of the starting point coordinate of the segmented image according to the resolution height of the input image, the number of lines of the projection splicing matrix, the number of lines of the splicing position and the height of the vertical fusion zone of the segmented image comprises the following steps:
judging whether the number of the lines of the splicing positions is equal to 1, if so, calculating the ordinate=0 of the starting point coordinates of the segmented image, and if not, calculating the ordinate= (the resolution height of the input image + the vertical fusion zone height of the segmented image)/the number of the lines of the projection splicing matrix (the number of the lines of the splicing positions-1) -the vertical fusion zone height of the segmented image +1;
the number of the rows of the splicing positions and the number of the columns of the splicing positions are natural numbers from 1.
4. The projection seamless stitching method of claim 1, further comprising, between the generating a segmented image step and the outputting a segmented image step, between the dividing the input image according to the segmented image start point coordinates, the segmented image width, and the segmented image height:
geometrically correcting the segmented image;
color correction and brightness correction are performed on the horizontal blend belt and/or the vertical blend belt in the split image.
5. A projection device, the device comprising:
the image input processing module is used for receiving an input image and acquiring the resolution width and the resolution height of the input image;
the splicing parameter acquisition module is used for acquiring the number of rows of the projection splicing matrix, the number of columns of the projection splicing matrix, the number of rows of splicing positions and the number of columns of splicing positions;
the device parameter acquisition module is used for acquiring the resolution width of the projection device, the resolution height of the projection device, the width of a preset horizontal fusion zone of the projection device and the height of a preset vertical fusion zone of the projection device;
the segmented image parameter calculation module is used for calculating the width of the horizontal fusion zone of the segmented image, the height of the vertical fusion zone of the segmented image, the width of the segmented image, the height of the segmented image and the starting point coordinates of the segmented image according to the acquired data; wherein, the segmentation image parameter calculation module comprises: a divided image horizontal fusion belt width calculation unit for calculating a horizontal fusion belt width using the formula: the method comprises the steps of calculating the width of a horizontal fusion zone of a segmented image by inputting the width of the horizontal fusion zone of the segmented image = the width of the horizontal fusion zone of a preset projection device/(the width of the resolution of the projection device x the number of columns of projection splicing matrices-the width of the horizontal fusion zone of the preset projection device x (the number of columns of projection splicing matrices-1)); a divided image vertical fusion belt height calculation unit for calculating a vertical fusion belt height of the divided image using the formula: the method comprises the steps of calculating a split image vertical fusion zone height by inputting the image resolution height by the split image vertical fusion zone height = preset projection device vertical fusion zone height/(projection device resolution height x projection splice matrix line number-preset projection device vertical fusion zone height x (projection splice matrix line number-1)); the split image width calculation unit is used for calculating the width of the split image according to the resolution width of the input image, the number of columns of the projection splicing matrix and the width of the horizontal fusion zone of the split image; the split image height calculating unit is used for calculating the height of the split image according to the resolution height of the input image, the number of rows of the projection splicing matrix and the vertical fusion zone height of the split image; the abscissa calculating unit is used for calculating the abscissa of the starting point coordinate of the segmented image according to the resolution width of the input image, the number of columns of the projection splicing matrix, the number of columns of the splicing position and the width of the horizontal fusion belt of the segmented image; the ordinate calculating unit is used for calculating the ordinate of the starting point coordinate of the segmented image according to the resolution height of the input image, the number of rows of the projection splicing matrix, the number of rows of the splicing position and the height of the vertical fusion belt of the segmented image;
the segmented image generation module is used for generating a segmented image by segmenting the input image according to the starting point coordinates of the segmented image, the width of the segmented image and the height of the segmented image;
and the segmented image output module is used for outputting the segmented image.
6. The projection apparatus according to claim 5, wherein the divided image width calculation unit calculates the divided image width based on the input image resolution width, the projection stitching matrix column number, and the divided image horizontal fusion zone width, and comprises:
judging whether the number of columns of the splicing position is equal to 1 or equal to the number of columns of the projection splicing matrix, if so, calculating the width of the segmented image = the width of the resolution of the input image/the number of columns of the projection splicing matrix + the width of the horizontal fusion zone of the segmented image/the number of columns of the projection splicing matrix, if not, calculating the width of the segmented image = the width of the resolution of the input image/the number of columns of the projection splicing matrix + (the number of columns of the projection splicing matrix + 1) the width of the horizontal fusion zone of the segmented image/the number of columns of the projection splicing matrix;
the method for calculating the height of the segmented image by the segmented image height calculating unit according to the resolution height of the input image, the number of rows of the projection splicing matrix and the vertical fusion zone height of the segmented image comprises the following steps:
and judging whether the number of the lines of the splicing positions is equal to 1 or equal to the number of the lines of the projection splicing matrix, if so, calculating the height of the split image=the resolution height of the input image/the number of the lines of the projection splicing matrix+the height of the vertical fusion zone of the split image/the number of the lines of the projection splicing matrix, and if not, calculating the height of the split image=the resolution height of the input image/the number of the lines of the projection splicing matrix+ (the number of the lines of the projection splicing matrix+1) the height of the vertical fusion zone of the split image/the number of the lines of the projection splicing matrix.
7. The projection apparatus according to claim 5, wherein the abscissa calculating unit of the start coordinates of the divided image calculates the abscissa of the start coordinates of the divided image based on the input image resolution width, the projection stitching matrix column number, the stitching position column number, and the divided image horizontal fusion belt width, comprising:
judging whether the number of the columns of the splicing positions is equal to 1, if so, calculating the abscissa=0 of the starting point coordinates of the segmented image, and if not, calculating the abscissa= (input image resolution width+segmented image horizontal fusion zone width)/projection splicing matrix number of columns (number of the columns of the splicing positions-1) -segmented image horizontal fusion zone width+1 of the starting point coordinates of the segmented image;
the method for calculating the ordinate of the starting point coordinate of the segmented image by the ordinate calculation unit according to the resolution height of the input image, the number of rows of the projection splicing matrix, the number of rows of the splicing position and the vertical fusion belt height of the segmented image comprises the following steps:
judging whether the number of the lines of the splicing positions is equal to 1, if so, calculating the ordinate=0 of the starting point coordinates of the segmented image, and if not, calculating the ordinate= (the resolution height of the input image + the vertical fusion zone height of the segmented image)/the number of the lines of the projection splicing matrix (the number of the lines of the splicing positions-1) -the vertical fusion zone height of the segmented image +1;
the number of the rows of the splicing positions and the number of the columns of the splicing positions are natural numbers from 1.
8. The projection device of claim 5, further comprising a segmented image correction module for geometrically correcting the segmented image; color correction and brightness correction are performed on the horizontal blend belt and/or the vertical blend belt in the split image.
9. A projection system comprising at least 2 projection devices according to any of claims 5-8.
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