Hi all, I need to use Otsu algorithm in my program but.. 1. I can not find itkOtsuThresholdCalculator.h/txx in my ITK TEST folder. Was this file added later to the toolkit? 2. How can I download it? Do I have to reinstall whole Insight Toolkit ? 3. How can I get to know what other new files are being added to the toolkit ? Thanks. Uday.