.mat converstion to jpg png jpeg etc

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Asaf Raza
Asaf Raza 2021-4-11
回答： Gayathri 2025-6-10
How i can convert the whole data set into jpg jpeg formate from .mat formate? currently each image is in .mat formate
  1 个评论
Walter Roberson
Walter Roberson 2021-4-11
Is it one mat file for each image? Is the variable name in the mat file consistent?
Are all images in the same .mat file? Are they in separate variables?

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回答（1 个）

Gayathri
Gayathri 2025-6-10
Hello @Asaf Raza,
Inorder to convert the images in '.mat' format to '.jpg', we should load each file and then convert using a "for loop". Please refer to the code below for achieving the same.
% Specify the folder containing the .mat files
folderPath = 'path_to_your_mat_files'; % Replace with your folder path
matFiles = dir(fullfile(folderPath, '*.mat')); % Get all .mat files
% Loop through each .mat file
for k = 1:length(matFiles)
% Load the .mat file
matFileName = fullfile(folderPath, matFiles(k).name);
data = load(matFileName);
% Extract the image data (adjust the variable name as necessary)
img = data.imageData; % Replace 'imageData' with the actual variable name
% Convert to uint8 if necessary
img = im2uint8(img); % Ensure the image is in the correct format
% Create a filename for the output image
[~, name, ~] = fileparts(matFiles(k).name); % Get the base name of the file
outputFileName = fullfile(folderPath, [name, '.jpg']); % Change extension to .jpg
% Save the image
imwrite(img, outputFileName);
end
The above code is written assuming that each image is stored in a separate '.mat' file. If it is a single MAT file for all images please modify the code accordingly.
For more information on "imwrite" function, refer to the following documentation link.
https://www.mathworks.com/help/matlab/ref/imwrite.html

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