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Re: Segmentation in ENVI [message #62430 is a reply to message #62429]

Wed, 10 September 2008 09:46

guillermo.castilla.ca is currently offline

guillermo.castilla.ca
Messages: 27
Registered: September 2008

Junior Member

Mort,

This involves several calls to Label_Region, but perhaps is easier
than Pal's suggestion (and will work also for a 8-neighborhood, by
including the /all kw in the call):

lmig = LABEL_REGION(climg EQ cl[0],/ULONG)
FOR i = 1, n - 1 DO BEGIN
mxlb = MAX(limg)
climgi = climg EQ cl[i]
limg = TEMPORARY(limg) + (LABEL_REGION(climgi, /ULONG) +
climgi*maxlb)
ENDFOR

Where climg is your classified image and cl is an array of n elements
containing the (numeric) labels of your classes. You might need to
zero the frame of your image before doing this.

Cheers

Guillermo

>> Hi Mort,
>
>> Try LABEL_REGION in IDL.
>> basically does a similar thing, only asks for a n-dimensional image
>> array as input. so you can separate your classification map to a 3D
>> cube with as many classes you have (including 'Unclassified') and feed
>> that to label_region as the data argument.
>
>> Tal
>
> Sounds good. Many thanks, Tal.
>
> 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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