Patent ID: 7738036

Claim:
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: x ⁢ ⁢ 1 = ( 0.5 × cosine ⁡ ( PI × j overlap ) + .5 ) 1 gamma ⁢ ⁢ and x ⁢ ⁢ 2 = ( 1 - ( 0.5 × cosine ⁡ ( PI × j overlap ) + .5 ) ) 1 gamma wherein x 1 represents a pixel from said first image portion after processing, x 2 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 x 1 and x 2 , overlap is the seaming area in number of pixels, and gamma is related to the gamma correction of the projector.