Algorithm to 'walk' along a line from an endpoint by N pixels

[Robin Wilson]

Hi,

Does anyone know if an algorithm to take an endpoint of a binary line in an 
image and 'walk' back along the line for N pixels already exists in 
skimage? (or in any of the related projects). I'm happy to go ahead and 
implement it, but it seems like the kind of thing that would have already 
been implemented, even though I can't find it in the documentation.

Does this already exist?

Cheers,

Robin
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/scikit-image/attachments/20130628/70d273bb/attachment.html>