Patrik Hoyer with Shani Offen, 6/17/03

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Separating out local phase, orientation, and contrast from linear 
filter responses
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I'll describe some ongoing work I'm doing with Eero and Shani. The 
basic idea is to derive local measures of phase, orientation, and 
contrast from the responses of a few oriented linear filters. This 
allows us to investigate image statistics using variables that possibly 
behave in a more predictable way than the original filter responses. 
After describing the technique we're using I'll present some very 
preliminary measurements using this framework.