question about i.zc

[charnotw]

Hi 

A collegue of mine has a question:

Does anybody know the whereabouts of any references for papers about the
type of zero-crossing edge detector used in i.zc. I have read the manual but
require something a bit more detailed.

cheers  Tom



Tom Charnock                       O--O
Dept Civil Engineering            (~~~~)
Aston University                 (  __  )
Birmingham B4 7ET UK             /|\  /|\
charnotw at sun.aston.ac.uk