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Re: weighted average for label_region [message #56388]

Wed, 24 October 2007 08:49

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

rpertaub@gmail.com writes:

> This leaves me with my spotscoord array with x,y coordinates. However,
> I need to find the center of each spot with some weighted
> average...i.e. if the cluster of pixels (for one spot) is more bright
> on one side, then the center will be skewed there...is there a way for
> me to do that?

Ah, this takes me back to my own blob processing days! :-)

You might find this article of interest:

http://www.dfanning.com/ip_tips/fit_ellipse.html

Also, if you don't add an extra pixel border to your
image before you do your LABEL_REGION thing, you will
likely run into considerable trouble with blobs or
spots touching the edge of your image.

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/

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