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Re: Scale many regions in one image without using xroi [message #81657]

Thu, 11 October 2012 08:14

Yngvar Larsen
Messages: 134
Registered: January 2010

Senior Member

On Thursday, 11 October 2012 12:31:49 UTC+2, (unknown) wrote:

> I did try dilate but nothing happened; I expect I used it wrong as I didn't really
> understand it. Cold you give me an example of how it could be used in this case?

You must define a structure element to dilate with. For your case, an all one square matrix of some size might do the trick.

IDL> array = bytarr(10,10)
IDL> array[4:6,4:5] = 1
IDL> array[6,3] = 1
IDL> print, array
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 1 0 0 0
0 0 0 0 1 1 1 0 0 0
0 0 0 0 1 1 1 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
IDL> print, dilate(array, bytarr(2,2)+1B)
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 1 1 0 0 0
0 0 0 1 1 1 1 0 0 0
0 0 0 1 1 1 1 0 0 0
0 0 0 1 1 1 1 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
IDL> print, dilate(array, bytarr(3,3)+1B)
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 1 1 1 0 0
0 0 0 1 1 1 1 1 0 0
0 0 0 1 1 1 1 1 0 0
0 0 0 1 1 1 1 1 0 0
0 0 0 1 1 1 1 1 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0

--
Yngvar

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[Message index]

		Re: Scale many regions in one image without using xroi By: Yngvar Larsen on Thu, 11 October 2012 08:14
		Re: Scale many regions in one image without using xroi By: eeaal on Thu, 11 October 2012 03:31
		Re: Scale many regions in one image without using xroi By: eeaal on Thu, 11 October 2012 03:29
		Re: Scale many regions in one image without using xroi By: Yngvar Larsen on Wed, 10 October 2012 07:03
		Re: Scale many regions in one image without using xroi By: Brian Daniel on Tue, 09 October 2012 08:20
		Re: Scale many regions in one image without using xroi By: eeaal on Mon, 08 October 2012 06:15

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