Patent ID: 7106341
Filing Date: 2006-09-12
Classification: G06T,H04N

Abstract:
1. An image interpolating device comprising: a color filter having a first row, in which red(R) and green(G) color filter elements are alternately aligned in the horizontal direction, and a second row, in which green(G) and blue(B) color filter elements are alternately aligned in the horizontal direction, said second row being adjacent to the upper or lower side of said first row; an imaging device that generates first R, G, and B-signals which are pixel signals corresponding to said color filter elements; a pattern-setting processor that extracts images belonging to a first pattern, in which a pixel having said first R-signal is positioned at the upper-left corner of a 2×2 pixel matrix, a second pattern, in which a pixel having said first G-signal is positioned at the upper-right corner of said 2×2 pixel matrix, a third pattern, in which a pixel having said first G-signal is positioned at the lower-left corner of said 2×2 pixel matrix, and a fourth pattern, in which a pixel having said first B-signal is positioned at the lower-right corner of said 2×2 pixel matrix, from said first R, G, and B-signals generated by said imaging device; a G-interpolation processor that, regarding first and fourth objective pixels contained in said images belonging to said first and fourth patterns, obtains a second G-signal by utilizing said first G-signals of pixels adjacent to said first or fourth objective pixel; an R/B-interpolation processor that, regarding second and third objective pixels contained in said images belonging to said second and third patterns, obtains second R and B-signals by utilizing said first R and B-signals of pixels adjacent to said second and third objective pixels; a first interpolation/modification processor that extracts a first similar pixel which has the closest luminance value to that of said first objective pixel, from pixels adjacent to said first objective pixel, obtains a third B-signal of said first objective pixel by a first interpolation process, and modifies said second G-signal and said first R-signal of said first objective pixel, based on first information of said first similar pixel; and a second interpolation/modification processor that extracts a second similar pixel which has the closest luminance value to that of said fourth objective pixel, from pixels adjacent to said fourth objective pixel, obtains a third R-signal of said fourth objective pixel by a second interpolation process, and modifies said second G-signal and said first B-signal of said fourth objective pixel, based on second information of said second similar pixel.