Hi ! I am working on a project that concerns a retinal identification system, the vascular patterns in each human eye being uniqe and non replecated. However i would greatly appreciate any ideas or suggestions concerning good feature extraction methods that i could use to feed my neural network with. I have already tried simple averaging and edgeing techniques which did not turn quite significant results.

Thank you very much
greatly appreciating any suggestions or replies

maby this site can help http://et.wcu.edu/aidc/BioWebPages/Biometrics_Eye.html
( my friend majors in security developement and works with some of this stuff...)