【谷速软件】matlab源码-图像RGB转YUV

function yuvimg = rgb2yuv(rgbimg)

% 转换矩阵

rgb2yuvT = [0.2126 0.7152 0.0722;...

-0.1146 -0.3854 0.5000;...

0.5000 -0.4542 -0.0468];

% 偏移矩阵

yuvoffset = [0; 128; 128];

% 计算

T = rgb2yuvT;

R = double(I(:,:,1));

G = double(I(:,:,2));

B = double(I(:,:,3));

Y = T(1,1) * R + T(1,2) * G + T(1,3) * B + yuvoffset(1); U = T(2,1) * R + T(2,2) * G + T(2,3) * B + yuvoffset(2); V = T(3,1) * R + T(3,2) * G + T(3,3) * B + yuvoffset(3);

% 转成uint8

Y = uint8(round(Y));

U = uint8(round(U));

V = uint8(round(V));

% 输出

yuvimg = cat(3,Y,U,V);

end