1. A computer-implemented method of lens shading color correction, comprising: obtaining at least one statistics grid of pixel data spatially corresponding to a frame having blocks; selecting at least some of the blocks to be included in at least one cluster of blocks, and comprising choosing candidate blocks at least with a difference in luminance or color ratio between the candidate block and a reference block that meets a criteria; and forming a lens shading correction (LSC) table based, at least in part, on color data of the clusters, and to be applied to correct color at the frame.