[Insight-users] itkOtsuMultipleThresholdCalculator.txx

[Jaehne Marion]

Hi everybody,

I take a look at the template class 
itkOtsuMultipleThresholdCalculator.txx to understand the way the otsu 
thresholds will be computed. More <se?lp=ende&p=/Mn4k.&search=more> 
precisely, I'm interested in how the between class variance is computed. 
<se?lp=ende&p=/Mn4k.&search=precisely>Did I understand it right that 
they the between class variance is computed like

classFrequency[0]*(mean - classMean[0])^2 + ...+ classFrequency[j]*(mean 
- classMean[j])^2

where j is the number of thresholds?

In the class itkOtsuMultipleThresholdsImageFilter, is there any chance 
to get all values of the between class variance, not only the maxima 
which correspond to the optimal thresholds?

Thanks a lot for any help!

Marion
|
|