[vtkusers] [Insight-users] logarithmic intensity transformation

Renaud Isabelle renauisa at yahoo.fr
Tue Jun 28 11:28:55 EDT 2005

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."
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,

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