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We propose a novel color demosaicking algorithm using direction categorization. Each pixel is classified as vertical, horizontal or smooth before interpolation. The categorization is based on gradient change within same channel, color differences and neighbors categories, so it explores relationship between intra-and inter-color channels. Color artifacts in reconstructed images are significantly reduced because directions of interpolation across edges are greatly avoided. Experimental resultsdoi:10.1109/icip.2007.4379996 dblp:conf/icip/YukALL07 fatcat:5vdr5ufrbzgedkc4vgjn4bd24q