Rename jpg files in a folder

I need some help here,

So I have like 200 Images with the name of 1 2 3 4 ... n

Ineed the file to be renamed as 001 002 .... 012... 034 .... 180 ... 200

How to do that?

Thanks,

[Stephen23]

https://www.mathworks.com/help/matlab/import_export/process-a-sequence-of-files.html

https://www.mathworks.com/help/matlab/ref/movefile.html

Answer 1

[Image Analyst]

Try this:

folder = pwd; % Wherever your input images are stored.
outputFolder = fullfile(folder, '/renamed'); % Can be the same as the input folder if you want.
% Make output folder if it exists.
if ~isfolder(outputFolder)
	mkdir(outputFolder)
end
fileList = dir('*.bmp')
% Loop over all files.
for k = 1 : length(fileList)
	% Get this filename.
	thisFileName = fullfile(fileList(k).folder, fileList(k).name);
	% Find out just the base filename without the folder.
	[~, baseFileNameNoExt, ext] = fileparts(thisFileName);
	number = str2double(baseFileNameNoExt);
	% Skip non-numbers
	if isnan(number)
		continue;
	end
	fprintf('Processing %s...\n', thisFileName);
	
	% Optionally display the image
% 	% Read in the input image.
% 	originalImage = imread(thisFileName);
% 	% Display it.
% 	imshow(originalImage);
% 	drawnow;

	% Create the new base filename without the folder.
	baseOutputFileName = sprintf('%3.3d%s', number, ext);
	% Create output image filename....
	fprintf('   Renaming to %s to %s...\n', baseFileNameNoExt, baseOutputFileName);
	% Create the output filename which will be in the output folder.
	outputFileName = fullfile(outputFolder, baseOutputFileName);
 	movefile(thisFileName, outputFileName); % or imwrite()
end
message = sprintf('Done processing %d images', length(fileList))
uiwait(helpdlg(message));

If you want to save the renamed files in a different folder, use imwrite(), otherwise if you want to rename in the same folder use movefile().

[Image Analyst]

Ravin - are you still there? Did it work or not?

[Ravin Rayeok]

Hey sorry just checked it today, it did work.

Thank you very very much!

[Niladri]

How to automatically change the name of several IMAGE files (in .bmp) stored in a folder?

Folder name is: gauss and filenames are stored as: GAUSS0, GAUSS1, GAUSS2,......etc.

I want to make them: GAUSS501, GAUSS502, GAUSS503,.... etc. in the same/different folder.

A quick help will be appreciated!

Thank you.

Niladri

[Image Analyst]

@Niladri see code below and make appropriate changes.

% Optional initialization steps
clc;    % Clear the command window.
close all;  % Close all figures (except those of imtool.)
clear;  % Erase all existing variables. Or clearvars if you want.
workspace;  % Make sure the workspace panel is showing.
format long g;
format compact;

folder = pwd; % or 'C:\Users\niladri\pictures'
if ~isfolder(folder)
    msgboxw('Warning: folder does not exist.\n"%s"\n\nPlease pick a new folder.', folder);
    folder = uigetdir;
    if ~isfolder(folder)
        return;
    end
end

filePattern = fullfile(folder, 'GAU*.bmp');
fileList = dir(filePattern)
if isempty(fileList)
    msgboxw('Warning: No .BMP files found in:\n"%s"\n\nPlease pick a new folder.', folder);
    folder = uigetdir;
    if ~isfolder(folder)
        return;
    end
end
allFileNames = {fileList.name}

for k = 1 : numel(allFileNames)
    baseFileName = allFileNames{k};
    thisFileName = fullfile(folder, baseFileName);
    fprintf('Checking "%s".\n', thisFileName)
    % Change fro GAUSS1 to GAUSS501 by replacing the first 5 characters
    newBaseFileName = strrep(baseFileName, 'GAUSS', 'GAUSS50');
    outputFullFileName = fullfile(folder, newBaseFileName);
    % Rename the .xlsx
    fprintf('    Renaming "%s" to "%s"\n', baseFileName, newBaseFileName);
    movefile(thisFileName, outputFullFileName);
end
if ispc
    winopen(folder);
end