Reduce the steps within this code

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Ayesha 2014-1-19

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https://ww2.mathworks.cn/matlabcentral/answers/112868-reduce-the-steps-within-this-code

编辑： Image Analyst 2014-1-19

采纳的回答： Amit

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Hi there!

I've been wondering of a way to cut down the steps of sorting the transform and thresholding which constructs an image based on specific # of coefficicents. f is the image and M=4096:

R = fft2(f);
s = sort(abs(R(:)));
s = s(end:-1:1);
T = s(M+1);
R = R.*(abs(R)>T);
f1 = real(ifft2(R));

Just a thought. What do you suggest?

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Amit 2014-1-19

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https://ww2.mathworks.cn/matlabcentral/answers/112868-reduce-the-steps-within-this-code#answer_121334

编辑：Amit 2014-1-19

在 MATLAB Online 中打开

R = fft2(f); 
s = sort(abs(R(:)),1,'descend'); 
%s = s(end:-1:1); 
T = s(M+1); 
%R = R.*(abs(R)>T); 
f1 = real(ifft2(R.*(abs(R)>T)));

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Ayesha 2014-1-19

Thanks a ton!!

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Image Processing and Computer Vision Image Processing Toolbox Image Filtering and Enhancement Image Arithmetic

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