MATLAB: Functions renaming answers from variable, also saving cropped image as file

croppingimage processingsaving

Hi there, I have a simple question that I couldn't find an answer to.

I wrote a simple function for cropping, where I am cropping multiple images at the same size and dimensions as such:

function [I4] = icrop (Image) 
I4 = imcrop(Image,[2000 1185 776 760]);
imshow(I4)
end

I want to be able to automatically saved the cropped image with a suffix after the variable name. So, if I put in A.jpg, I want the cropped file to be A1.jpg

Any suggestions? Thanks

Best Answer

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.

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MATLAB: Autorename if saved file already exist

You have to check it by your own if a file is existing already.

[EDITED: Consider {File.txt, File3.txt}]

function SaveWithNumber(FileName, Data)
[fPath, fName, fExt] = fileparts(FileName);
if isempty(fExt)  % No '.mat' in FileName
  fExt     = '.mat';
  FileName = fullfile(fPath, [fName, fExt]);
end
if exist(FileName, 'file')
  % Get number of files:
  fDir     = dir(fullfile(fPath, [fName, '*', fExt]);
  fStr     = lower(sprintf('%s*', fDir.name);
  fNum     = sscanf(fStr, [fName, '%d', fExt, '*']);
  newNum   = max(fNum) + 1;
  FileName = fullfile(fPath, [fName, sprintf('%d', newNum), fExt]);
end
save(FileName, 'Data');

Limitations: "FileNameInf.txt" and "FileNameNaN.txt" will cause troubles...

Consider, that:

exist(FileName, 'file')

replies TRUE for directories also.

MATLAB: How to project an image stack in time dimension

It should be as simple as:

%%I just do this for all files in the same directory, you'll have to fix file-finding...
fNames = dir('*.tif');
totD = 0;
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  imageD1 = imread(fNames(i1).name);
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  totD = totD + imageD1;
end

HTH

Best Answer

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MATLAB: Autorename if saved file already exist

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