MATLAB: How to make matrix from images in folders

.csv fileconvert imageshuman motion recognitionimages

Hello.

I want to convert images in folders to CSV file.

(name of images : weighted2, weighted3, weighted4, weighted5,,,,)

Best Answer

Hi Kong,

I am assuming all images are of ‘.jpg’ format and located in same folder. If they are of different format, tweak below provided code as required.

Below mentioned code can be used for writing each image into separate CSV files:

for i=1:5
    imName = strcat('weighted', num2str(i),'.jpg');
    imVal = imread(imName);
    fName=strcat('weightedimage',num2str(i),'.csv');
    writematrix(imVal,fName);
end

And for saving images to different worksheets of a single excel file, use below mentioned code:

for i=1:5
    imName = strcat('weighted', num2str(i),'.jpg');
    imVal = imread(imName);
    writematrix(imVal, 'weightedimages.xlsx','Sheet',i);
end

For more details, please refer imread and writematrix documentation.

Hope this helps!

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MATLAB: Conversion of .BMP to .jpg images

Sean, try this code:

% Demo to create JPG copies of BMP files in a different folder.
% By Image Analyst
% inputFolder = fileparts(which('cameraman.tif')) % Determine where demo folder is (works with all versions).
inputFolder = fullfile(pwd, 'Project\Matlab Folder\BMP Data');
filePattern = fullfile(inputFolder, '*.bmp')
% Get list of all BMP files in input folder
bmpFiles = dir(filePattern)
% Create the output folder:
outputFolder = fullfile(pwd, 'Project\Matlab Folder\JPEG Data')
if ~exist(outputFolder, 'dir')
  mkdir(outputFolder);
end
figure;
% Enlarge figure to full screen.
set(gcf, 'Units', 'Normalized', 'OuterPosition', [0 0 1 1]);
% Loop over all bmp files, making a jpg version 
% of them in the output folder.
for k = 1 : length(bmpFiles)
  % Read in .bmp file
  baseFileName = bmpFiles(k).name;
  fullFileNameInput = fullfile(inputFolder, baseFileName)
  rgbImage = imread(fullFileNameInput);
  subplot(1, 2, 1);
  imshow(rgbImage);
  title('Original image', 'FontSize', 30);
  drawnow;
  
  % Prepare output file name
  fullFileNameOutput = fullfile(outputFolder, baseFileName);
  % Converts to JPEG and gives it the .jpg extension
  fullFileNameOutput = strrep(lower(fullFileNameOutput), '.bmp', 'jpg')
  imwrite(rgbImage,fullFileNameOutput);
  % Reloads it in a JPEG format to see how bad the compression artifacts are.
  rgbImage = imread(fullFileNameOutput);
  subplot(1, 2, 2);
  imshow(rgbImage);
  title('Recalled JPG image', 'FontSize', 30);
  drawnow;
  pause(1);
end
% Open Windows Explorer to the output folder:
winopen(outputFolder);

Best Answer

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MATLAB: Conversion of .BMP to .jpg images

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