How to decide upon a threshold
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I am using the function wthresh to carry out soft thresholding on my wavelet coefficients however, I was wondering if someone could advise me and how to decide upon the best threshold to use. How is the best threshold usually determined?
many thanks in advance Bran
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Image Analyst
on 16 May 2013
try my interactive thresholding app: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862. Once you find a good threshld visually, try to figure out an algorithm to determine that from the histogram. As you know there is not one threshold or one algorithm that works best for all images ever taken in the universe. So you have to figure out the algorithm that works best for you.
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Image Analyst
on 16 May 2013
I don't have the wavelet toolbox so I don't know what wthresh() does or how to use it. I'd have to look it up in the help - same as you. Sorry. Maybe Wayne King will see your question and answer you.
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