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Re: Segmentation in ENVI [message #62422]

Thu, 11 September 2008 00:30

Mort Canty
Messages: 134
Registered: March 2003

Senior Member

guillermo.castilla.castellano@gmail.com schrieb:
>> Any idea why the ENVI built-in doesn't work?
>
> Well, I wouldn't say it doesn't work, it is simply intended to perform
> a different task, namely to partition into homogeneous regions a grey-
> level image. In your case (a classified image), you already have a
> partition where each region is a set of connected pixels sharing a
> common class. What you wanted to do is to single out the regions
> within your classified image, which is different from what is usually
> understood as 'segmentation'.
>

I wonder if we're talking about the same function. There are two
"Segmentation Image" commands in the ENVI main menu. The one I mean is

"Classification/Post Classification/Segmentation Image"

This command explicitly asks for an ENVI Classification Image and aborts
if you don't provide one. Then you can choose any combination (or all)
class labels and start segmenting. I think it should respect class
labels, otherwise it makes no sense (too me anyway). But it doesn't.

Cheers

Mort

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[Message index]

		Re: Segmentation in ENVI By: Mort Canty on Thu, 11 September 2008 00:30
		Re: Segmentation in ENVI By: guillermo.castilla.ca on Wed, 10 September 2008 13:36
		Re: Segmentation in ENVI By: Mort Canty on Wed, 10 September 2008 11:51
		Re: Segmentation in ENVI By: guillermo.castilla.ca on Wed, 10 September 2008 09:46
		Re: Segmentation in ENVI By: Mort Canty on Wed, 10 September 2008 01:52
		Re: Segmentation in ENVI By: Tal on Tue, 09 September 2008 23:19
		Re: Segmentation in ENVI By: guillermo.castilla.ca on Thu, 11 September 2008 08:26

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