[GRASS-user] "Select shapes from image"[->Gimp]/tracing in GRASS ?

[Nikos Alexandris]

Hi Peter!

peter:
...
> * Task: "Some combination of GRASS modules" derives a shortest path (a
> subset of pixels, not a vector) between the two given points which is
> plotted along the contrast changes of the raster data.

There is i.zc and I think r.gauss (an add-on provided by Jachym [1])
that should do edge-detection. Haven't used i.zc, with r.gauss I was
playing a bit in the past.

Cheers, Nikos
---

[1] http://grass.osgeo.org/wiki/GRASS_AddOns#r.gauss