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Re: find_boundary routine [message #38669 is a reply to message #38636]

Wed, 24 March 2004 10:29

brian_frizzelle
Messages: 2
Registered: March 2004

Junior Member

David and Ben,

Thanks for the assistance. I now understand how David's routine works,
and it attacks this perimeter problem in a different manner than what
I needed. So I wrote a different routine which will calculate the
boundary of a region in an array, as long as all cells in the region
are coded with a 1.
The reason that the FIND_BOUNDARY routine didn't work for me is that I
needed to calculate the perimeters from the pixel corners rather than
the centers. So a one-pixel region should have a perimeter of 4, and a
2-by-2 region should have a perimeter of 8. In your routine, the
one-pixel region's perimeter would be 0, and the 2x2 pixel region's
perimeter would be 1.

If anyone is interested, I can post my code.

Brian

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[Message index]

		Re: find_boundary routine By: David Fanning on Thu, 18 March 2004 18:47
		Re: find_boundary routine By: btt on Thu, 18 March 2004 14:47
		Re: find_boundary routine By: brian_frizzelle on Wed, 24 March 2004 10:29

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