说明: for i=0:255; f=power((i+0.5)/256,1/2.2); LUT(i+1)=uint8(f*256-0.5); end img=imread('g2.bmp'); img0=rgb2ycbcr(img); R=img(:,:,1); G=img(:,:,2); B=img(:,:,3); Y=img0(:,:,1); Yu=img0(:,:,1); [x y]=size(Y); for row=1:x for width=1:y for i=0:255 if (Y(ro
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