how i measure a threshold value to use it in a wavelet_based image segmentation ?

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mona
mona 2013-8-22
hi, i need a help please i want to know how i measure a threshold value to use it in a wavelet_based image segmentation ? if any one has a code , function or any answer that help me please send it thanks for your time

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Amith Kamath
Amith Kamath 2013-8-22
If you are looking at segmentation in general, and tuning parameters to do so, I would recommend using http://www.mathworks.com/matlabcentral/fileexchange/38484-segmenttool-an-interactive-gui-for-segmenting-images.
For specific cases of wavelet transformed images, the threshold would depend on the scale and frequency you want to focus on.
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Amith Kamath
Amith Kamath 2013-8-22
As far as I can tell, there is no analytic threshold value which can be preset in your code, and so it would depend on specific cases. http://eeweb.poly.edu/iselesni/lecture_notes/WaveletQuickStudy_expanded.pdf has some good discussion about this.

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