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Re: contouring from an explicit point in an array [message #34710 is a reply to message #34709]

Thu, 03 April 2003 09:57

Matt Feinstein
Messages: 33
Registered: July 2002

Member

On Thu, 3 Apr 2003 17:36:15 +0000 (UTC), egraves@socrates.Berkeley.EDU
(Ted Graves) wrote:

> Hi all,
>
> Is there a way to get only the contour of an image that passes through a
> given point? I'm currently doing this by contouring the entire image
> using the intensity of the desired point as a level, and then only keeping
> the contour with a vertex within half a pixel of that point. But this
> seems pretty kludgey and error-prone to me.
>

Don't know if there's a method that's a lot better, but I'd subtract
the critical value from the intensity array so that the desired level
value equals zero and use a filled contour to reduce the pixel
boundary error.

Matt Feinstein

--
The Law of Polarity: The probability of wiring a battery with
the correct polarity is (1/2)^N, where N is the number of times
you try to connect it.

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		Re: contouring from an explicit point in an array By: K. Bowman on Thu, 03 April 2003 09:59
		Re: contouring from an explicit point in an array By: Matt Feinstein on Thu, 03 April 2003 09:57

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