manipulating each pixel in an image sequence

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AAS
AAS 2022-3-16
回答： yanqi liu 2022-3-17
Hi,
I have an image sequence of about 40 frames. I have some noise and out of plane motion in this sequence. I would like to look at each pixel in the 2D image over these 40 frames . How do I do that? How do I manipulate (reduce noise) and also draw information from each pixel (get FFT of the pixel over 40 frames).

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回答（2 个）

Walter Roberson
Walter Roberson 2022-3-16
k = 3;
dim = 3;
filtered_sequence = movmedian(ImageSequence, k, dim);
fft_of_sequence = fft(ImageSequence, [], dim); %fft over third dimension
yanqi liu
yanqi liu 2022-3-17
yes，sir，may be use loop to process，such as
for i = 1 : 40
im = imread(fullfile(pwd, 'images', sprintf('%02d.jpg')));
for j = 1 : size(im, 3)
im2(:,:,j) = medfilt2(im(:,:,i));
end
im3 = mat2gray(log(abs(fft2(double(im2(:,:,1))))+eps));
figure(i);
subplot(1,3,1); imshow(im, []); title(sprintf('origin image %02d', i));
subplot(1,3,2); imshow(im2, []); title(sprintf('medfilt denoise image %02d', i));
subplot(1,3,3); imshow(im3, []); title(sprintf('fft image %02d', i));
end

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