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

%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...

Answer 1

[Image Analyst]

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);

[Manoj Kumar]

Thanks for your code. It helped me a lot..

[Manoj Kumar]

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]

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.