MATLAB 已生成图片colorbar颜色转换

clear 
I = imread('C:\Users\admin\Desktop\书稿图片再加工\3.3.8.png');
figure
imshow(I);
% I = I(72:232,579:599,:);
iimag = double(reshape(I,[],3));


cmap = jet(256)*256;
cmap = [cmap;