Batch image processing loop

2 visualizaciones (últimos 30 días)
Owen Lane
Owen Lane el 12 de Mzo. de 2021
Comentada: Owen Lane el 15 de Mzo. de 2021
I would like the system to read every image in the folder, which i does correctly but only processes the baseFile. How do i get it to run the below function on every image as it reads it?
%%Load image
rgb = imread(fullFileName);
%%Load image
Folder = 'C:\Users\Owen\Desktop\UNIVERSITY\Year 3\SEM2\KV6003 Induvidual Projects\MATLAB code';
if ~isfolder(Folder)
errorMessage = sprintf('Error: The following folder does not exist:\n%s', Folder);
uiwait(warndlg(errorMessage));
return;
end
filePattern = fullfile(Folder, '*.jpg');
jpegFiles = dir(filePattern);
for k = 1:length(jpegFiles)
baseFileName = jpegFiles(k).name;
fullFileName = fullfile(Folder, baseFileName);
fprintf(1, 'Now reading %s\n', fullFileName);
imageArray = imread(fullFileName);
imshow(imageArray); % Display image.
%%Find red points
redPoints = rgb(:,:,1)>=100 & rgb(:,:,2)<=149 & rgb(:,:,3)<=140;
percentRed = 100*(sum(sum(redPoints))/(size(rgb,1)*size(rgb,2)));
fprintf('Image has %d red pixels\n',sum(sum(redPoints)))
fprintf('Image is %.2f percent red\n',percentRed)
%%Highlight red on image
rgbRed = uint8(cat(3,redPoints,redPoints,redPoints)).*rgb;
figure(2)
imshow(rgbRed)
%Find green points
greenPoints = rgb(:,:,1)<=104 & rgb(:,:,2)>=0 & rgb(:,:,3)<=100;
percentGreen = 100*(sum(sum(greenPoints))/(size(rgb,1)*size(rgb,2)));
fprintf('Image has %d green pixels\n',sum(sum(greenPoints)))
fprintf('Image is %.2f percent green\n',percentGreen)
%Highlight green on image
rgbGreen = uint8(cat(3,greenPoints,greenPoints,greenPoints)).*rgb;
figure(3)
imshow(rgbGreen)
%Find blue points
bluePoints = rgb(:,:,1)<=111 & rgb(:,:,2)<=112 & rgb(:,:,3)>=0;
percentBlue = 100*(sum(sum(bluePoints))/(size(rgb,1)*size(rgb,2)));
fprintf('Image has %d blue pixels\n',sum(sum(bluePoints)))
fprintf('Image is %.2f percent blue\n',percentBlue)
%Highligh blue on image
rgbBlue = uint8(cat(3,bluePoints,bluePoints,bluePoints)).*rgb;
figure(4)
imshow(rgbBlue)
end

Respuesta aceptada

Aghamarsh Varanasi
Aghamarsh Varanasi el 15 de Mzo. de 2021
Editada: Aghamarsh Varanasi el 15 de Mzo. de 2021
Hi,
The image that you are reading using 'imread' in the for loop is assigned to a variable 'imageArray', whereas the operations are done on a variable named 'rgb'. Renaming the variable 'imageArray' to 'rgb' would solve the issue.
Forth line in the for loop would be,
...
for k = 1:length(jpegFiles)
baseFileName = jpegFiles(k).name;
fullFileName = fullfile(Folder, baseFileName);
fprintf(1, 'Now reading %s\n', fullFileName);
rgb = imread(fullFileName);
imshow(rgb); % Display image.
...
  1 comentario
Owen Lane
Owen Lane el 15 de Mzo. de 2021
Hi,
Thank you for your feedback.
I have tested this and it has worked perfectly. It now identifies and processes each image in the folder.
Thank you again

Iniciar sesión para comentar.

Más respuestas (0)

Productos


Versión

R2019b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by