标题：Improved Adaptive Demosaicking Using Directional Weighting
作者：Zhou, Xiao; Yang, Fanfan; Zhang, Chunxiao; Wang, Chengyou
作者机构：[Zhou, Xiao; Yang, Fanfan; Zhang, Chunxiao; Wang, Chengyou] Shandong Univ, Sch Mech Elect & Informat Engn, Weihai 264209, Weihai, Peoples R China.
会议名称：9th IEEE International Conference on Computer Science and Education (ICCSE)
会议日期：AUG 22-24, 2014
来源：2014 PROCEEDINGS OF THE 9TH INTERNATIONAL CONFERENCE ON COMPUTER SCIENCE & EDUCATION (ICCSE 2014)
关键词：image demosaicking; color filter array (CFA); adaptive edge; directional; weighting; image interpolation
摘要：Color filter array (CFA) interpolation is the integral part of image processing for single sensor digital cameras. In this paper, we present a novel algorithm based on directional weighting and adaptive edge detection. We evaluate the edges by using improved edge detection method and estimate the missing color values in different directions. By calculating differences of directional gradients, the threshold will be determined when we calculate the pixel values according to weighting coefficients. Experimental results show that the proposed method yields visually pleasant results and outperforms existing demosaicking methods in composite peak signal-to-noise ratio (CPSNR). In addition, the computational complexity of the proposed method is comparable to the existing methods.