Groups > comp.soft-sys.math.mathematica > #1638

x y coordinates of image pixels for an image outline

From	william parr <willpowers69@hotmail.com>
Newsgroups	comp.soft-sys.math.mathematica
Subject	x y coordinates of image pixels for an image outline
Date	2011-04-12 09:52 +0000
Organization	Steven M. Christensen and Associates, Inc and MathTensor, Inc.
Message-ID	<io17cv$i44$1@smc.vnet.net> (permalink)

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Dear Mathgroup,

I think this problem is fairly straight forward, but I'm struggling with it!

essentially, I want to;
1) determine/assign x y coordinate values to the black pixels in a binarised image.
2) select the outline black pixels (and get their x y coordinates) on each line of the image.

This falls within a larger project of wanting to recover the outside outline (ie surface outline with x y coordinates) of a bone from a CT slice image. I would then probably aim to create a 3D point cloud for the external bone surface by assigning each slice a z coordinate value. However, unless anyone has a very clever (ie not processor intensive) way of of creating a polygon mesh from the 3D point cloud, I will probably export the point cloud for surface meshing in another program.

thanks in advance,

Will

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x y coordinates of image pixels for an image outline william parr <willpowers69@hotmail.com> - 2011-04-12 09:52 +0000
  Re: x y coordinates of image pixels for an image outline Stefan <wutchamacallit27@gmail.com> - 2011-04-15 07:56 +0000
    Re: x y coordinates of image pixels for an image outline Stefan <wutchamacallit27@gmail.com> - 2011-04-16 11:33 +0000

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