Hi Adam, On Fri, Oct 31, 2008 at 9:51 PM, Adam C Powell IV <hazelsct@xxxxxxxxxx> wrote: > Greetings, > > I am working on an image processing plug-in (which I'll offer for > upstream contribution BSD-licensed), and would really like to have a > couple of primitives that I can't find. > > One is finding "islands" in an image: take a channel and create new > layers each with one contiguous region in the channel. So if the > channel has ten islands, create ten new layers, each with one of the > islands. Since this could be unwieldy (too many new layers), one new > layer with one island would suffice; one could then process that island > layer, subtract it from the original, and move on. > > Another is integrals: zero, first and second moments, or alternatively, > integrals/sums of channel intensity, x- and y-weighted intensity, and > x^2, y^2 and xy-weighted intensity. This lets me fit an ellipse to an > island, and then display major and minor axes. > > Finally, opening and storing data files. I'd like to be able to create > a CSV file with statistics of the islands: size, centroid, aspect ratio > (major/minor axis ratio), major axis orientation. One could then > further process these statistics in a spreadsheet or other program. > > I can do the first two in scheme, though it would be slow, but tolerable > for my needs. I don't see a script-fu primitive which would let me do > the last. > > If there are other packages which can do this, that would be helpful. > But having it in the same program/UI as GIMP, with all of its other > image manipulation tools, and with its presence across platforms, would > be even better. I'd love to have your ideas. It sounds like you might find working with the combination of Gimp-Python, NumPy and SciPy more effective. integration,definitely. Islands, possibly (a browse through http://scipy.org/scipy/scipy/browser/trunk might help you to find out. And Python has a CSV module as standard. I had the impression that writing external files was not supported by Script-Fu; I'm sure Kevin Cozens could tell you. Hope that helps, David _______________________________________________ Gimp-developer mailing list Gimp-developer@xxxxxxxxxxxxxxxxxxxxxx https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
