How to convert a flat scan of a 3D object, into a 3D picture in cylindrical coordinates?
- To: mathgroup at smc.vnet.net
- Subject: [mg47643] How to convert a flat scan of a 3D object, into a 3D picture in cylindrical coordinates?
- From: gilmar.rodriguez at nwfwmd.state.fl.us (Gilmar Rodr?guez Pierluissi)
- Date: Tue, 20 Apr 2004 03:18:46 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Please; double-click the following internet links:
(1.) the text file: "Abe3D.txt" and,
(2.) an Excel spreadsheet: "Abe3D.xls".
The file "Abe3D.txt" is data obtained by scanning the surface of a
bust of Abraham Lincoln. This file contains a 95 X 73 array of
values. Each line of longitude was smoothened using a cubic spline,
and the whole array can be used to draw a (rough) 3D picture of the
You can view this picture by opening the spreadsheet Abe3D.xls,
and opening the Excel chart in it. Notice that the image of "Abe"
is flat; i.e. similar to a Mercator map of the World. My question is:
How can I build a 3D picture of Abe, using cylindrical coordinates,
so that the new picture looks like the real bust of Abe, and a person
can rotate the picture of the bust in 3D?
Thank you for your help!
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