MATLAB 文件对话框之图片格式转换

Posted 2020-07-01

localpathname为当前路径，需要保存图片的位置，根据自己的实际路径设置，usedpathname用来保存打开的文件位置，方便下次打开文件对话框以上次的路径为默认路径。

global usedpathname; 
global localpathname; 
localpathname=‘D:\Program Files\MATLAB\R2013a\bin\毕业设计\图片\‘;
if ~ischar(usedpathname)
[filename, pathname, filterindex] = uigetfile( ...
{ ‘*.*‘, ‘All Files (*.*)‘;‘*.tif‘,‘ (*.tif)‘; ...
‘*.png‘,‘ (*.png)‘;‘*.bmp‘,‘ (*.bmp)‘; ...
}, ...
‘Pick a file‘, ...
‘MultiSelect‘, ‘on‘);
else
[filename, pathname, filterindex] = uigetfile( ...
{ ‘*.*‘, ‘All Files (*.*)‘;‘*.tif‘,‘ (*.tif)‘; ...
‘*.png‘,‘ (*.png)‘;‘*.bmp‘,‘ (*.bmp)‘; ...
}, ...
‘Pick a file‘, ...
‘MultiSelect‘, ‘on‘,usedpathname);
end
usedpathname=pathname;
pic=strcat(pathname,filename);
pic=imread(pic);
if size(pic,3)>1
pic=rgb2gray(pic);
imwrite(pic,[ localpathname strtok(filename,‘.‘) ‘.tif‘])
end
clear pathname;