load wbarb;

figure,imshow(X,map);%显示原图

imwrite(X,map,'C:\Users\Jv\Desktop\wbarb.jpg');%保存索引图

src=ind2rgb(X,map);%索引图像转rgb

figure,imshow(src);%显示原图

gray=ind2gray(X,map);%灰度图

figure,imshow(gray);

imwrite(gray,'C:\Users\Jv\Desktop\wbarb_gray.jpg');