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Objects in ENVI ROI files [message #48839]

Mon, 22 May 2006 05:22

Bradley Wallet
Messages: 4
Registered: March 2006

Junior Member

Does anyone know how to extract polygon information from an ENVI ROI
file? I have ROI files that contain multiple objects, each as its own
polygon. I have an application I wrote, and it needs to extract each
of these objects separately. Currently, I do a region growing
algorithm, but I want something cleaner and faster. Tech support told
me the following:

> You can do this in a round about way by exporting the ROI to an EVF (each point
> as separate record) and then exporting the evfs back to ROIs (each record of EVF to
> new ROI). This can be used to 'separate' the different entities in one ROI into multiple
> ROIs.

Surely there is a cleaner way to do this that would be transparent to
the user. Any suggestions? If I have to read the ROI file myself,
that's fine, but I haven't found any documentation on the format.

Brad

------------------------------------------------------------ --------------------------------------
Brad Wallet
President and Chief Scientist
Automated Decisions, LLC
consulting@automateddecisions.com

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[Message index]

		Objects in ENVI ROI files By: Bradley Wallet on Mon, 22 May 2006 05:22
		Re: Objects in ENVI ROI files By: zhour.najoui on Thu, 16 May 2013 05:23
		Re: Objects in ENVI ROI files By: Josh Sixsmith on Mon, 20 May 2013 22:08
		Re: Objects in ENVI ROI files By: samsammurphy on Thu, 05 March 2015 10:02
		Re: Objects in ENVI ROI files By: Josh Sixsmith on Thu, 23 May 2013 21:22
		Re: Objects in ENVI ROI files By: zhour.najoui on Wed, 22 May 2013 06:40

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