Hi there... I used r.grow to segment dNBR images to map wildfires. See:
https://www.researchgate.net/publication/269692754_Semi-automated_mapping_of_burned_areas_in_semi-arid_ecosystems_using_MODIS_time-series_imagery Hope it helps... 2015-11-11 3:47 GMT-03:00 Uttam Kumar <uttamsinh...@gmail.com>: > > > Hi All, > > Is watershed image segmentation program or a similar module available in > GRASS GIS? > > I understand that we have r.watershed, i.segment and r.grow in GRASS GIS. > But I do not know which one best suits my problem. > > The problem is: > > I have two layers of raster data - > 1.) a gradient image (obtained by applying a 3 x 3 sobel filter on a water > index using r.mapcalc), and > 2.) a seed image of 2 classes labelled as "1" and "2" and remaining pixels > as "0". > > I want to use the seed image and the gradient image (which shows direction > of change in intensity) information to perform segmentation using the > watershed algorithm and label all "0" pixels as either 1 or 2. > > r.watershed does not use watershed segmentation algorithm. i.segment is > something close but I am not sure. > > Please suggest. > > Any comment is appreciated. > > Uttam. > > > > _______________________________________________ > grass-user mailing list > grass-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/grass-user > -- Dr. Leonardo A. Hardtke Laboratorio de Teledetección y S.I.G. Centro Nacional Patagónico (CONICET) Bvd. Brown 2825, 9120 Puerto Madryn, Chubut, Argentina
_______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
