Messages from Usenet group comp.lang.idl-pvwave, compiled by Paulo Penteado
RADON: user-specified angular range possible?
To whoever may have used IDL's RADON function before: I am using the (forward) Radon transform to detect the orientation angle of features in radiographs. Since I know the approximate value of the angle beforehand, I need the transform only in a very limited range of angles. Calculating the entire range [0, pi], as RADON does by default, is a mere waste of time. Hence my question: Does the RADON function allow the user to specify any other angular range than [0, pi]? From the documentation and a futile attempt using the THETA keyword, I think it doesn't. But I sure would appreciate if someone could tell me that I'm wrong. Thanks Timm -- Timm Weitkamp <http://people.web.psi.ch/weitkamp>