[photo-3d] Re: X-Ray Stereo Pair of Flower

[abram.klooswyk@xxxxxx]

Ralph Johnston:
> I have posted a large 2D image plus stereo pairs in 4 formats.  
> Which do you like best?  
 
Peter Abrahams:
>This is slide #22, Pink Peace Rose, by Albert Richards of Ann Arbor, 
>Mich.   He had an article in Stereo World, Jan/Feb 1992.

I also remember (and have) that article.
Peter modestly didn't mention that he has posted (a few years ago) 
stereo-x-rays of shells on his website, where they still are.
(This is good internet practice, some say: sites should live
forever.)  

Ralph has posted the same pair L-R as well as R-L.
But the funny thing about stereo-x-rays is that both work with
parallel as well as with cross-eyed viewing. If you don't
know how the real flower looked there is no way to tell
which pair is pseudoscopic and which orthoscopic, because 
the x-rays pictures are totally transparant.

For medical stereo x-rays (now hardly used anymore) it was
essential in some cases to use lead markers, for example in 
lateral stereo views of the cervical spine it is impossible to
say which side is left or right without lead markers, or
without carefully marking the films. (Surgeons like to
know on which side the fracture is.)

Abram Klooswyk 


 

Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/