Re: What can you do in 2d that cannot do in 3d (Escher)

[P3D Bob Wier <wier@xxxxxxxxxxxxxxxxx>]

This message from Boris appeard to get wrongly diverted off for
some reason...


|From: P3D Boris Starosta <boris@xxxxxxxxxxxx>
|Subject: Re: What can you do in 2d that cannot do in 3d (Escher)
|
|G. Themelis writes:
|
|>Ken Luker writes:
|
|>>I believe one cannot, in principle, make a convincing 3d
|>>photograph of the Escher fixture.
|
|>Since these are "impossible" objects (i.e. do not exist and cannot be
|>constructed in real life) it is reasonable to expect that a convincing 3d
|>photograph cannot be made.  However I believe that a 3d drawing or a
|>computer-generated image can be made and perhaps a real photograph
|>can be digitally "twisted" to produce the impossible object.
|
|In fact, 3D Magazin has a fine little article on just this subject in the
|July-Sept issue.  A theory is presented on how to construct a stereo pair
|of a triangular impossible solid, which does indeed show depth, with all
|three legs of the triangle coming towards the observer - and all three legs
|apparently connected in space.  The article shows the final result, a
|computer generated stereo pair.  The trick is in the third leg, which is
|discontinuous in a very subtle way.
|
|I think one could definitely do this sort of thing with photography,
|although some photo- or computer-retouching would certainly be required.
|Actually, maybe I'll give this a try...
|
|Boris
|
|
|
|Boris Starosta
|
|usa 804 979 3930
|
|boris@xxxxxxxxxxxx
|http://www.starosta.com
|
|"Chaos, like the grave, is a haven for equality."
|- Eric Hoffer



------------------------------

End of PHOTO-3D Digest 2293
***************************
***************************
 Trouble? Send e-mail to 
 wier@xxxxxxxxxxxxxxxxxxxxxxxx 
 To unsubscribe select one of the following,
 place it in the BODY of a message and send it to:
 listserv@xxxxxxxxxxxxxxxxxxxxxxxx 
   unsubscribe photo-3d
   unsubscribe sell-3d
   unsubscribe overland-trails
   unsubscribe icom
 ***************************