[GRASS-dev] New histogramming tool for GRASS 7

[Michael Barton]

You can save the histogram to various image formats. Here is an example from a set of Landsat bands 1-5, and 7. It took about 1 second to histogram all 6 bands.

http://dl.dropbox.com/u/7437464/histogramtest.png
____________________
C. Michael Barton
Director, Center for Social Dynamics & Complexity 
Professor of Anthropology, School of Human Evolution & Social Change
Arizona State University

voice: 	480-965-6262 (SHESC), 480-727-9746 (CSDC)
fax:          480-965-7671 (SHESC),  480-727-0709 (CSDC)
www: http://www.public.asu.edu/~cmbarton, http://csdc.asu.edu



On Sep 22, 2011, at 7:28 PM, <grass-dev-request at lists.osgeo.org> wrote:

> Date: Wed, 21 Sep 2011 22:25:05 -0700
> From: Michael Barton <Michael.Barton at asu.edu>
> Subject: [GRASS-dev] New histogramming tool for GRASS 7
> To: GRASS developers grass-developers <grass-dev at lists.osgeo.org>
> Message-ID: <4940725D-199D-49EC-BB3E-703AE35FA7E0 at asu.edu>
> Content-Type: text/plain; charset="us-ascii"
> 
> Something that I've thought about for quite awhile but only now managed to get around to doing. I have added a new histogramming tool to GRASS 7, based on PyPlot like the profiling tool. It will histogram a single raster map or all the maps in an imagery group. It gives user control over colors and line styles, axes, legends, fonts, and grid.
> 
> It is available from the analysis toolbar button on the display canvas as "Create histogram with PyPlot" for now. I've left in the old tool that displays d.hist in a window. It should be especially useful for image analysis.
> 
> Give it a try and let me know if you hit any bugs.