matlab 批处理图片

% 改变图片分辨率
clear all;clc
inputfile='C:\Users\Steel\Desktop\fig\';
outputfile='C:\Users\Steel\Desktop\fig\';
Files=dir([inputfile '*.bmp']);
number=length(Files);
for i=1:number
img=imread([inputfile Files(i).name]);
img_out=imresize(img,[420 560]);
imwrite(img_out,[outputfile Files(i).name(1:end-4) 'o.bmp']);
end