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Thread Subject:
definition of projection area

Subject: definition of projection area

From: m4 Chrennikov

Date: 21 Sep, 2010 11:32:04

Message: 1 of 4

Hi.
At the moment I write a program to rate the fragmentation effect.
Is there a Matlab built-in tools for the rapid determination of the projection areas of figures (cubes, spheres, cones, etc.) on the plane? Actually, this is not a plane, it is part of a sphere (http://xmages.net/storage/10/1/0/6/b/upload/b5ceb605.png). Information on the density of the axisymmetric fragmentation field is divided into zones of 2 degrees (from the fuse to the bottom of the shell). I hope I lucidly explained.
Just wanted to know what tool is better to used for visualization of tragets, each target consists of 4-400 figures (cubes, spheres, cones, etc.)

Subject: definition of projection area

From: ImageAnalyst

Date: 21 Sep, 2010 11:53:56

Message: 2 of 4

Well there's radon() and fanbeam() in the Image Processing Toolbox but
I think they only project a 2D image onto a line. I don't know if
they work for 3D arrays (I doubt it) or if there's an analogous built-
in function. You might have to write your own.

Subject: definition of projection area

From: m4 Chrennikov

Date: 26 Sep, 2010 07:40:32

Message: 3 of 4

Any other suggestions? Maybe computation geometry will help? Will the solution easier if I only use the cubes? (Bodies without the second-order surfaces)

Subject: definition of projection area

From: ImageAnalyst

Date: 26 Sep, 2010 12:45:19

Message: 4 of 4

On Sep 26, 3:40 am, "m4 Chrennikov" <abre...@gmail.com> wrote:
> Any other suggestions? Maybe computation geometry will help? Will the solution easier if I only use the cubes? (Bodies without the second-order surfaces)

-----------------------
I don't have any other suggestions. I think it's just such a niche
application that there's nothing built in and you'll have to write it
yourself.

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