System and method for smoothing seams in tiled displays
First Claim
Patent Images
1. A display for producing a substantially seamless combined image on a screen from at least first and second images, comprising:
- at least first and second projectors for projecting corresponding first and second images separately onto a screen, said projectors projecting said first and second images such that a portion of said first image overlaps a portion of said second image so as to define at least one seam region on said screen;
an image processor coupled to said first and second projectors for adjusting brightness of said first and second image portions such that said seam is substantially not visible to a viewer;
wherein said processor adjusts said brightness of said first and second image portions according to a quadratic relationship, wherein said quadratic relationship is described by the relationship;
wherein x1 represents a pixel from said first image portion after processing, x2 represents a pixel from said second image portion after processing, j represents the pixel number in the seam region corresponding to the location of overlapping pixels x1 and x2, overlap is the seaming area in number of pixels, and gamma is related to the gamma correction of the projector.
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Abstract
The present invention provides method for producing a substantially seamless video image on a display surface. The method comprises the steps of separately projecting at least a first and a second video image onto a display surface such that a seam is defined by overlapping portions of said first and second video images. Inside the seam, the brightness of the first video image and the brightness of the second video image are adjusted electronically so as to provide a uniform brightness profile.
14 Citations
6 Claims
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1. A display for producing a substantially seamless combined image on a screen from at least first and second images, comprising:
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at least first and second projectors for projecting corresponding first and second images separately onto a screen, said projectors projecting said first and second images such that a portion of said first image overlaps a portion of said second image so as to define at least one seam region on said screen; an image processor coupled to said first and second projectors for adjusting brightness of said first and second image portions such that said seam is substantially not visible to a viewer;
wherein said processor adjusts said brightness of said first and second image portions according to a quadratic relationship, wherein said quadratic relationship is described by the relationship;wherein x1 represents a pixel from said first image portion after processing, x2 represents a pixel from said second image portion after processing, j represents the pixel number in the seam region corresponding to the location of overlapping pixels x1 and x2, overlap is the seaming area in number of pixels, and gamma is related to the gamma correction of the projector.
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2. A method for producing a substantially seamless combined image on a screen from at least first and second images, comprising:
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providing at least first and second projectors for projecting corresponding first and second images separately onto a screen, said projectors projecting said first and second images such that at least a portion of said first image overlaps at least a portion of said second image so as to define at least one seam region on said screen; processing said first and second image portions so as to adjust at least one characteristic of said first and second image portions in accordance with corresponding characteristics of said projectors; projecting said adjusted first and second image portions onto said screen; adjusting the brightness of said first and second image portions in accordance with the linearly inverse relationships; wherein x1 represents a pixel from said first image portion after processing, x2 represents a pixel from said second image portion after processing, j represents the pixel number in the seam region corresponding to the location of overlapping pixels x1 and x2, overlap is the seaming area in number of pixels, and gamma is related to the gamma correction of the projector. - View Dependent Claims (3, 4, 5, 6)
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Specification