topic Re: Remove noise Grid in Data Management Questions

Remove noise Grid

ludovicofrate — Sat, 29 Sep 2012 11:15:12 GMT

Hi there!
In ArcView exists a function in the generalize grid tool, that allows to remove noise (is called just like that) in a grid image. Can ArcGis 10 perform the same operation?
Thanks

Re: Remove noise Grid

JeffreySwain — Tue, 02 Oct 2012 10:51:57 GMT

There are several options in the Generalization Tools for Spatial Analyst. Depending on what type of generalization that you are looking to perform you may prefer the Majority Filter or perhaps Nibble.

Re: Remove noise Grid

ludovicofrate — Tue, 02 Oct 2012 13:50:05 GMT

There are several options in the Generalization Tools for Spatial Analyst. Depending on what type of generalization that you are looking to perform you may prefer the Majority Filter or perhaps Nibble.

thank you for the answer! But I need to remove pixel under a threshold (10 pixel) and both Majority filter and Nibble do not allow to do this!

Re: Remove noise Grid

JeffreyEvans — Wed, 03 Oct 2012 16:46:00 GMT

The Sieve tool in our Geomorphometry and Gradient Metrics Toolbox will do exactly what you are wanting.

http://conserveonline.org/workspaces/emt/documents/all.html

Re: Remove noise Grid

ludovicofrate — Mon, 08 Oct 2012 18:02:25 GMT

The Sieve tool in our Geomorphometry and Gradient Metrics Toolbox will do exactly what you are wanting.

http://conserveonline.org/workspaces/emt/documents/all.html

Thank you for the tip! I still haven't tried the tool but i have found this procedure
http://resources.arcgis.com/en/help/main/10.1/index.html#//00nv00000010000000