smooth hue transition interpolation algorithm in logarithmic exposure space out = shtlog(in) Demosaic'ing algorithms estimate missing color information by interpolation of the known color information across different color planes. Ting Chen implementation. Must be re-written entirely. Assumptions : in has following color patterns ------------------> x | G R G R ... | B G B G ... | G R G R ... | B G B G ... | . . . . . | . . . . . | . . . . . | V y Input : in : original image matrix (mxnx3), m&n even Output : out : color interpolated image