% CORS = CombineByer(FrameR,FrameGR,FrameGB,FrameB,bayer_order)
% from channel data to raw data.
% Inputs:
% FrameR,FrameGR,FrameGB,FrameB, every channel of the photo
% bayer_order the oder of FRAME. rggb and so on
% Outputs:
% CombinedFrame： the photo finish combined
