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Re: checking for connectedness of a given set of pixels [message #73338 is a reply to message #73333]

Tue, 02 November 2010 13:37

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Guillermo writes:

> Hi there, I would need to create a function that tells me whether a
> set of pixels (given by their 2D coordinates) forms a single blob or
> consists of two or more disjoint groups, in either a 4- or 8-
> neighborhood. Can anyone suggest a computationally cheap method for
> doing that (i.e., one that doesn't rely on label_region or search_2d)?

Why are you hoping to re-write these two useful routines?

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		Re: checking for connectedness of a given set of pixels By: David Fanning on Wed, 03 November 2010 06:35
		Re: checking for connectedness of a given set of pixels By: guillermo.castilla.ca on Wed, 03 November 2010 06:32
		Re: checking for connectedness of a given set of pixels By: David Fanning on Tue, 02 November 2010 15:14
		Re: checking for connectedness of a given set of pixels By: guillermo.castilla.ca on Tue, 02 November 2010 15:06
		Re: checking for connectedness of a given set of pixels By: David Fanning on Tue, 02 November 2010 13:37
		Re: checking for connectedness of a given set of pixels By: James[2] on Mon, 08 November 2010 11:22
		Re: checking for connectedness of a given set of pixels By: guillermo.castilla.ca on Sun, 14 November 2010 13:56
		Re: checking for connectedness of a given set of pixels By: guillermo.castilla.ca on Mon, 03 January 2011 13:50

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