[Insight-users] logarithmic intensity transformation

[Renaud Isabelle]

Hi Luis,
 
In one of your numerous posted replies, you already mentioned the use of logarithmic scaling to improve visualisation of images.
 
"It is not rare to use a logarithmic intensity transformation in order to display the FFT output and still be able to "see" something."
http://public.kitware.com/pipermail/insight-users/2004-November/011201.html
 
This is actually what I need to do to improve the quality of my ultrasonographic image. 
 
--> Could you tell me a way to perform this logarithmic scaling? Is there already a function for that, or maybe could I compute my own one if you tell me how to get access of the pixel data of my image displayed with ITK and VTK.
 
Thanks for answer,
 
Isabelle

		
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