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Re: Problems with ERODE and DILATE functions [message #73600 is a reply to message #73589]

Wed, 17 November 2010 12:05

guillermo.castilla.ca is currently offline

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

Junior Member

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

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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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