threshold images and save as jpeg in loop

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udi ibgui
udi ibgui 2020-2-13
回答： Subhadeep Koley 2020-2-13
Hi, I would like to run a threshold to approx 50 images of mine and then save the output as jpg, currently im not managing as the saved file says it cannot be read. below is my code
for i = 1:numel(I)
%Obtain red matrix of image
filename = fullfile(path, I(i).name);
im = imread(filename);
%Extract Red Channel
b = im(:,:,1);
%Normalising red values
Norm=double(b(:))./255;
%Reshaping to fit image shape
[f,g]=size(b);
imn=reshape(Norm,[f,g]);
%threshold image
thresh = imn .* imn>(0.6258);
thresh_im = uint8(thresh);
name = int2str(i);
save([name, '.jpg'], 'thresh_im')
end
Please help?

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采纳的回答

Subhadeep Koley
Subhadeep Koley 2020-2-13
Use imwrite instead of save.
for i = 1:numel(I)
% Obtain red matrix of image
filename = fullfile(path, I(i).name);
im = imread(filename);
% Extract Red Channel
b = im(:, :, 1);
% Normalising red values
Norm = double(b(:)) ./ 255;
% Reshaping to fit image shape
[f, g] = size(b);
imn = imresize(Norm, [f, g]);
% Threshold image
thresh = imn .* imn>(0.6258);
thresh_im = uint8(thresh);
% Save the image
imwrite(thresh_im, ['img', num2str(i), '.jpg']);
end

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