Question

计算一张图片的RGB/LAB/CMKY各分量的均值。MATLAB等

如图一张图片，因为每个点得L、A、B值有一些差异，RGB、CMKY亦然，想要通过软件计算出整张图片的各项均值，特别是A值、R值、M值。photoshop、matlab皆可，望不吝赐教。

Answer 1

I = imread('1.jpg');
% RGB各分量均值
RGB_mean = mean(mean(I));
R_mean = RGB_mean(:,:,1)

%Lab各分量均值
cform = makecform('srgb2lab');
I_lab = applycform(I, cform);
LAB_mean = mean(mean(I_lab));
A_mean = LAB_mean(:,:,2)

%cmky各分量均值
cform = makecform('srgb2cmyk');
I_cmky = applycform(I,cform);
CMKY_mean = mean(mean(I_cmky));
M_mean = CMKY_mean(:,:,2)

追问

谢谢你的回答，我明天运行试一试。