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

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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

Answers (1)

Amith Kamath
Amith Kamath on 22 Aug 2013
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.
  4 Comments
Amith Kamath
Amith Kamath on 22 Aug 2013
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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