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filtering images in the fourier domain [message #37160]

Mon, 17 November 2003 06:06

dino.nicola
Messages: 7
Registered: October 2003

Junior Member

is anybody out there that can tell me how to filter row by row or column by
column an image (actually one radiographic projection)

indeed I am little confused with the FFT call in IDL

in matlab the commands are :

% matalb working example ... column by column ... H is my filter

proj = fft(proj); % p holds fft of projections
for ic = 1:size(proj,2)
% filter column by column i.e. row sino by row sino
proj(:,ic) = proj(:,ic).*H; % frequency domain filtering
end
proj = real(ifft(proj)); % p is the filtered projections

thank you in advance for your attention

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