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Re: Image analysis and ring identification [message #30369 is a reply to message #30271]

Thu, 18 April 2002 08:33

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

James Kuyper (kuyper@gscmail.gsfc.nasa.gov) writes:

> Yes, but I didn't get the impression that he wants to find the bright
> spot. He asked how to determine the center of the circle, and complained
> about the fact that the bright spot would mess up the centroid-based
> method of calculating the center, because the bright spot was off-center.

Isn't language odd? I thought she asked how to find the
center of the ring, but then realized she wasn't interested
in the center, but in the bright spot, which wasn't necessarily
in the center. I think she might be able to have her cake
and eat it too, depending upon the values she uses to
calculate the centroid. In fact, she might even learn
something fascinating about her rings by measuringg how
the centroid changes between the two different calculations.

But, hang on a minute! We don't have to be Aristotle and
his friends arguing endlessly about how many teeth a
horse has, we can ask the source. Rachel, what in the
world are you asking about?

Cheers,

David
--
David W. Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438, E-mail: david@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155

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[Message index]

		Re: Image analysis and ring identification By: James Kuyper on Thu, 18 April 2002 08:07
		Re: Image analysis and ring identification By: Paul Van Delst[1] on Thu, 18 April 2002 06:44
		Re: Image analysis and ring identification By: David Fanning on Thu, 18 April 2002 06:05
		Re: Image analysis and ring identification By: Paul Van Delst[1] on Thu, 18 April 2002 05:37
		Re: Image analysis and ring identification By: Rachel Pepper on Wed, 17 April 2002 21:21
		Re: Image analysis and ring identification By: David Fanning on Wed, 17 April 2002 07:29
		Re: Image analysis and ring identification By: Dan Larson on Thu, 18 April 2002 08:37
		Re: Image analysis and ring identification By: David Fanning on Thu, 18 April 2002 08:33

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