A color interpolation technique is proposed for image signal processing system in single-chip CMOS image sensor SoC with Bayer color-filter-array format.Considering that G color component plays a key role in luminance value of image,the algorithm focuses on the reconstruction of the missing G components.First,the algorithm judges the edge-direction,and then the weighted edge-direction gradient is calculated,which makes the reconstruction of G-component aviod the phenomenon of edge blur effectively.Meanwhile...