how to save/write images using for loop?

Question

azizullah khan 2014-2-10

1
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https://ww2.mathworks.cn/matlabcentral/answers/115539-how-to-save-write-images-using-for-loop

评论： Soner Kar 2022-5-16

for i=1:10
   imwrite(x,'i.jpg') % x be a image to write 
end;

how to vary i that different images can be saved?

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Answer 1

Azzi Abdelmalek 2014-2-10

12
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https://ww2.mathworks.cn/matlabcentral/answers/115539-how-to-save-write-images-using-for-loop#answer_123844

编辑：Azzi Abdelmalek 2014-2-10

在 MATLAB Online 中打开

for i=1:10
   imwrite(x,sprintf('%d.jpg',i))
end;

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ABDULMAJEED ALYAZIDI 2021-12-1

Thanks!

Soner Kar 2022-5-16

Thanks a lot!

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Answer 2

Mischa Kim 2014-2-10

5
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/115539-how-to-save-write-images-using-for-loop#answer_123845

编辑：Mischa Kim 2014-2-10

在 MATLAB Online 中打开

Azizullah, the code snippet below shows you how to save an (or several) images using a loop.

N = 4;
A = imread('my_img.png');
for ii = 1:N   
   imwrite(A,strcat('my_new',num2str(ii),'.png'));
end

The strcat command creates (oncatenates) a new string for each image containing a number (as a possible image identifier).

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Kamran shahani 2016-11-20

编辑：Image Analyst 2016-11-20

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bro and how I read and write multiple images I have code when i select two pictures, it give me error :

Error in imread (line 316)
[filename, fmt_s, extraArgs] = parse_inputs(varargin{:});
%improve underwater image 
tic;
[filename, pathname, filterindex] = uigetfile( ...
{
   '*.*',  'All Files (*.*)'}, ...
   'Pick a file', ...
   'MultiSelect', 'on');
if isequal(filename,0)
   disp('User selected Cancel')
else
   disp(['User selected', fullfile(pathname, filename)])
end
Il=imread(filename);
% imshow(Il), title('original');
RGB=Il;
cform2lab=makecform('srgb2lab');
LAB= applycform(RGB, cform2lab);
%image onvert in to L*A*B color  space
L=LAB(:,:,1);
LAB(:,:,1)=adapthisteq(L,'cliplimit', 0.02, 'Distribution', 'rayleigh');
cform2srgb=makecform('lab2srgb');
% convert back to RGB
A=applycform(LAB, cform2srgb);
t=toc,
 imwrite(A,strcat('a','.jpg'))
subplot(2,2,1), imshow(RGB), title('BEFOR CLAHE');
subplot(2,2,2), imshow(A), title('AFETR CLAHE');

Image Analyst 2016-11-20

在 MATLAB Online 中打开

That's because you constructed the full filename when you used disp() but forgot to use it when you called imread. Also, multiselect needs to be off, not on since imread() can't open multiple files at once. To fix:

% Have user browse for a file, from a specified "starting folder."
% For convenience in browsing, set a starting folder from which to browse.
startingFolder = 'C:\Program Files\MATLAB';
if ~exist(startingFolder, 'dir')
  % If that folder doesn't exist, just start in the current folder.
  startingFolder = pwd;
end
% Get the name of the file that the user wants to use.
defaultFileName = fullfile(startingFolder, '*.*');
[baseFileName, folder] = uigetfile(defaultFileName, 'Select a file');
if baseFileName == 0
  % User clicked the Cancel button.
  fprintf('You clicked the Cancel button.\n');
  return;
end
fullFileName = fullfile(folder, baseFileName)
fprintf('You chose file %s.\n', fullFileName);
% Read in the file.
Il = imread(fullFileName);