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Re: Problems with ERODE and DILATE functions [message #73589]

Thu, 18 November 2010 00:55

Oriol Güell Riera
Messages: 7
Registered: September 2010

Junior Member

On 17 nov, 21:05, Guillermo <guillermo.castilla.castell...@gmail.com>
wrote:
> Hola Oriol,
>
> I haven't read thoroughly your post or your code, but since you say
> that "erode" and "dilate" modify separate your ellipses sometimes, it
> may be the case that then you have too many individual regions and
> your code gets too slow. Instead of using WHERE and SEARCH_2D, you can
> use LABEL_REGION and HISTOGRAM to locate individual regions in a much
> more efficient way:
>
> hst= histogram(label_region(slice, min=1, omax=nreg, rev=r)
> for j=0L, nreg-1 do begin
> region= r[r[j]:r[j+1]-1]
> ...
> numpts= hst[j]
> ...
> endfor
>
> Also, instead of dilate and erode, you could simply use the MEDIAN
> function to remove small regions or holes within small regions
>
> Bona sort!
>
> Guillermo

Hola Guillermo

Thank you very much for your suggestions!
I have thought in another way to approach the problem, and it seems
that it works fine, fingers crossed!

Moltes gràcies per l'ajuda!

Oriol

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[Message index]

		Re: Problems with ERODE and DILATE functions By: Oriol Güell Riera on Thu, 18 November 2010 00:55
		Re: Problems with ERODE and DILATE functions By: guillermo.castilla.ca on Wed, 17 November 2010 12:05
		Re: Problems with ERODE and DILATE functions By: Oriol Güell Riera on Tue, 16 November 2010 23:57
		Re: Problems with ERODE and DILATE functions By: James[2] on Tue, 16 November 2010 13:44
		Re: Problems with ERODE and DILATE functions By: Oriol Güell Riera on Tue, 16 November 2010 08:02
		Re: Problems with ERODE and DILATE functions By: David Fanning on Tue, 16 November 2010 07:56
		Re: Problems with ERODE and DILATE functions By: Oriol Güell Riera on Tue, 16 November 2010 07:38
		Re: Problems with ERODE and DILATE functions By: David Fanning on Tue, 16 November 2010 07:27

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