MATLAB: How to retrieve a word from a filename

matlab function

name:"rgb_watermark_lena.jpg"

I want to retrieve only "lena" word from file

It should be "lena.jpg"

Can any one sort out this problem

name = 'rgb_watermark_lena.jpg';
name(end-7:end-4)
ans =
lena

You probably get the point :)

filename = 'A.jpg';
number   = 1;
[fPath, fName, fExt] = fileparts(filename);
newfilename = fullfile(fPath, sprintf('%s%d%s', fName, number, fExt));

Then use imwrite with the new file name.

You need to use fullfile() to make a name with the output folder prefixing the base file name:

outputFileName = fullfile(outputFolder, filename);
imwrite(img, outputFileName);