Area computation and contour generation

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#721

From: Xiaoyi Wu
Date: Thu, 07 Dec 1995 21:52

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Hi dear gurus,

If the message doesn't belong to this newsgroup, I
am sorry - I tried my best to direct it to appropriate
ones.

I need to do some statistics different regions of an
image, the contour of the regions will be defined by
user with the use of mouse.

What I have done is I traced the movement of the 
mouse and generated a set of coordinates of the 
contour(s), but when I tried to calculate the area
within the contour(s), I find it very very 
complicated, at least for me.

Is there an established algorithm to do this? - also,
the contour generated by the user might not be closed,
is there also an algorithm to generate a closed 
contour?

Thanks.

Xiaoyi

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Message-ID: <4a7nnh$1p3@charm.magnus.acs.ohio-state.edu>

Path: arc1-ca.pugleaf.net!bmecg.bme.ohio-state.edu!xiaoyi

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Path: arc1-ca.pugleaf.net!bmecg.bme.ohio-state.edu!xiaoyi
From: xiaoyi@bmecg.bme.ohio-state.edu (Xiaoyi Wu)
Newsgroups: alt.graphics.pixutils,comp.graphics.algorithms,comp.graphics.visualization,comp.sys.sgi.graphics,osu.graphics,comp.graphics.api.misc,comp.graphics.apps.data-explorer,comp.graphics.misc,de.comp.graphik,comp.windows.x,comp.lang.c,comp.windows.x.motif
Subject: Area computation and contour generation
Date: 7 Dec 1995 21:52:49 GMT
Organization: Biomedical Engineering OSU
Distribution: world
Message-ID: <4a7nnh$1p3@charm.magnus.acs.ohio-state.edu>
Reply-To: xiaoyi@bmecg.bme.ohio-state.edu (Xiaoyi Wu)