MATLAB: Rename file extension from 1.png to 001.png and so on

added file extension automaticallyloop over files

hi everyone,can I know how to rename the extension of 1.png to 001.png in matlab script!for your information, from the loop of my coding, the file has been created as 1.png and saved in a folder. however, I want to name the file as 001.png in my matlab script. how to do it.besides, if I have more than one file I should make it automatically rename as 001.png, 002.png ,003.png. how to make it? thank you.

Best Answer

folder='D:\answers\'
for k=1:1
file1=sprintf('%d.png ',k)
file2=sprintf('00%d.png',k)
dos_com=['!rename ', folder  file1 file2]
eval(dos_com)
end

Edited code (Simon's suggestions)

folder='D:\answers\'  % e.g
for k=1:4
 file1=[folder sprintf('%d.png ',k)]
 file2=[folder sprintf('00%d.png',k)]
 movefile(file1 ,file2] 
end

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MATLAB: Name of saved image should be the same than read image

Try this:

files = dir('*.png');
if exist('NewFolder', 'dir')
    NewFolder=mkdir('NewFolder');
end
for k = 1:numel(z)
   % Get input base file name.
   thisImage = imread(files(k).name);
   % Correct the image.
   correctedImage = undistortImage(thisImage, cameraParams);
   % Create the output filename.
   baseFileName = files(k).name; % Same as source filename.
   fullOutputFileName = fullfile(NewFolder, baseFileName);
   % Save the output image.
   imwrite(correctedImage, fullOutputFileName);  
end

MATLAB: Open a series of images and save them in another folder

See http://www.mathworks.com/matlabcentral/answers/13205#answer_18099 to format your code.

See the FAQ to process a sequence of images: http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

You need to have two folder variables, one for input, and one for output. And you need two base file names, one for input and one for output. Then use full file to create two filenames:

fullInputFileName = fullfile(inputFolder, baseInputFileName);
fullOutputFileName = fullfile(outputFolder, baseOutputFileName);

baseInputFileName would be files(k).name.

See full demo below:

% Copies all the files from one folder to another folder.
clc;    % Clear the command window.
workspace;  % Make sure the workspace panel is showing.
format compact;
% Define input and output folders.
% CHANGE THESE FOLDER NAMES!!!!!!
inputFolder = pwd;
outputFolder = uigetdir(pwd);
if strcmp(outputFolder, inputFolder)
  errorMessage = sprintf('Error: the output folder must be different than the input folder');
  uiwait(warndlg(errorMessage));
  return;
end
% Check to see that both folders exist.
if ~isdir(inputFolder)
  errorMessage = sprintf('Error: The following input folder does not exist:\n%s', inputFolder);
  uiwait(warndlg(errorMessage));
  return;
end
if ~isdir(outputFolder)
  errorMessage = sprintf('Error: The following output folder does not exist:\n%s', outputFolder);
  uiwait(warndlg(errorMessage));
  return;
end
% Get a list of files to copy.
filePattern = fullfile(inputFolder, '*.*'); % All files.
% filePattern = fullfile(inputFolder, '*.m'); % m-files.
fileNamesToTransfer = dir(filePattern);
numFiles = length(fileNamesToTransfer);
% Do the copying.
for k = 1 : numFiles
  % Get the base file name.
  baseFileName = fileNamesToTransfer(k).name;
  % Create the full input and output filenames.
  fullInputFileName = fullfile(inputFolder, baseFileName);
  fullOutputFileName = fullfile(outputFolder, baseFileName);
  fprintf(1, 'Now copying file #%d of %d: %s to %s\n', ...
    k, numFiles, fullInputFileName, fullOutputFileName);
  copyfile(fullInputFileName, fullOutputFileName);
end
msgbox('Done copy files!', 'modal');

Best Answer

Related Solutions

MATLAB: Name of saved image should be the same than read image

MATLAB: Open a series of images and save them in another folder

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