[X,map]=imread('canoe.tif');
Image_Type_YN1=isind(X);
%索引圖像的讀取與判斷
I = imread('moon.tif'); 
Image_Type_YN2=isgray(I);
%灰度圖像的讀取與判斷
RGB=imread('flowers.tif'); 
Image_Type_YN3=isrgb(RGB);
%真彩色圖像的讀取與判斷
BW = imread('circles.tif');
Image_Type_YN4=isbw(BW);
%二值圖像的讀取與判斷
disp([Image_Type_YN1 Image_Type_YN2 Image_Type_YN3 Image_Type_YN4]);
%返回值結果在MATLAB工作間顯示