How do I make atrifacts for a synthetic image?
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Hello to everyone, could anybody help me making artifacts for a synthetic image?
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Image Analyst
le 10 Juil 2011
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Jan
le 11 Juil 2011
This is an adequate answer. Neither "artifact" nor "synthetic image" is well defined, such that an answer can be pure guessing only. Please, Mary, explain all needed details.
Sean de Wolski
le 11 Juil 2011
Ring artifacts and reconstruction artifacts for a parallel beam configuration:
I = imread('cameraman.tif');
theta = 0:.1:180; %make a bigger increment to add more reconstruction noise (e.g. 0:5:180);
S = radon(I,theta);
n = 5; %num rings
r = floor(rand(n,1)*size(S,1));
r2 = min(r+floor(rand(n,1)*8),size(S,1)); %max ring thickness is 8
for ii = 1:n
S(r(ii):r2(ii),:) = bsxfun(@minus,S(r(ii):r2(ii),:),.4*range(S(r(ii):r2(ii),:),2));
end
I2 = uint8(iradon(S,theta));
imshow(I2)
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