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how to rename and save the result of image in the gui?

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Manoj Kumar
Manoj Kumar 2014-4-28
评论： Image Analyst 2014-5-1
%Input file name is TOPGAL.jpg and i am converting it into grayscale:
%i am doing this with the help of push buttons in the GUI.
%input file - push button 1
axes(handles.axes1);
global im
[filename,pathname]=uigetfile('*'); % read the input image
im=imread([pathname,filename]);
%oupufile - push button 2
axes(handles.axes2);
im1=rgb2gray(im);
"" now how to save the output image with the name as TOPGAL_gray.jpg("original file name"_gray.jpg) directly without need to type it again"
THANKS...

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Image Analyst
Image Analyst 2014-4-28
编辑：Image Analyst 2014-4-28
Try this:
[baseFileName, folder]=uigetfile('*') % read the input image
% other code.....
% Now save as jpg format.
[~, baseFileName, extension] = fileparts(baseFileName);
outputBaseFileName = sprintf('%s_gray.jpg', baseFileName);
outputFullFileName = fullfile(folder, outputBaseFileName)
imwrite(im1, outputFullFileName);
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Manoj Kumar
Manoj Kumar 2014-5-1
The code is working well when I save the image using save push button for one time. But when I try to save another image second time, it is getting overwritten on the first image that I saved. I am loosing the first image. Can you please help me.
Thanks...
Image Analyst
Image Analyst 2014-5-1
What gets reported to the command window for baseFileName? If you selected a different folder, then baseFileName will be different and then outputBaseFileName will also be different. Check to see that they are different.

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