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Re: Calculate maximum diameter? [message #47368 is a reply to message #47300]

Mon, 06 February 2006 14:36

Jeff N.
Messages: 120
Registered: April 2005

Senior Member

Yep, it does need to go through the center. I may end up using a
fitted ellipse as a starting point, so we'll just see what works best.
Thanks for the ideas!

Jeff

kuyper@wizard.net wrote:
> Jeff N. wrote:
>> Hi folks,
>>
>> I have a set of roughly circular ROI's for which I want to compute the
>> maximum diameter - the longest straight line from one point on the
>> boundary of the ROI, through the center, to the opposing boundary.
>
> Is it essential that it go through the center? In many contexts its
> more useful to know the length of the longest straight line from any
> given vertex to any other vertex. There's a pretty obvious O(N^2)
> algorithm for finding that maximun distance.

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[Message index]

		Calculate maximum diameter? By: Jeff N. on Sat, 04 February 2006 12:28
		Re: Calculate maximum diameter? By: Karsten Rodenacker on Tue, 07 February 2006 00:06
		Re: Calculate maximum diameter? By: Jeff N. on Wed, 08 February 2006 15:01
		Re: Calculate maximum diameter? By: Paul Van Delst[1] on Mon, 06 February 2006 15:17
		Re: Calculate maximum diameter? By: Jeff N. on Wed, 08 February 2006 15:18
		Re: Calculate maximum diameter? By: Jeff N. on Mon, 06 February 2006 14:36
		Re: Calculate maximum diameter? By: James Kuyper on Mon, 06 February 2006 07:41
		Re: Calculate maximum diameter? By: greg michael on Mon, 06 February 2006 05:14

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