[MATLAB GUI] 求助：图像装载不出来怎么办？

[cathjj05]

用了一个显示图像的界面，按下按钮后应该显示图像，运行后显示
Error using ==> imread
Unable to determine the file format
该如何改imread函数？

以下是该函数：

function varargout = LoadPush_Callback(h, eventdata, handles, varargin)%回调函数


global im_original im_noised im_filtered %global:定义全局变量
[filename, pathname] = uigetfile('*.bmp;*.pgm;*.tif;*.jpg;*.*', 'Load input image');%读取文件
if isequal(filename,0) | isequal(pathname,0)
disp('User pressed cancel')%disp：显示
else
disp(['User selected ', fullfile(pathname, filename)])
end
im_original=imread(filename);
set(handles.Or_image,'HandleVisibility','OFF');%handles:句柄
set(handles.Out_image,'HandleVisibility','OFF');
%set(handles.Denoised_image,'HandleVisibility','OFF');
set(handles.Or_image,'HandleVisibility','ON');
axes(handles.Or_image);
imshow(im_original);
colormap(gray(256));
axis equal;%让图像的大小与框架吻合
axis tight;%同上
axis off;%把数轴关掉
set(handles.Or_image,'HandleVisibility','OFF');
set(handles.Or_image,'XTickLabel',' ','YTickLabel',' ');

[yhcode]

好好看看help中对imread函数的讲解,你这个程序中,读写的图像文件格式可能是pgm,jpg,bmp,比如你读取的图像是个bmp图像,应该imread(filename,'bmp'),你这个函数的改造要在读取文件时同时用一个变量保存当前图像文件的后缀,如extent, 之后用imread(filename,extent)就可以了