P3D Re: From Euclid to Wheatstone and further on

[KenDunkley@xxxxxxx]

In  PHOTO-3D digest 3032,  Date: Tue, 20 Oct 1998 19:20:05 +0100
 abram klooswyk <abram.klooswyk@xxxxxx> wrote a brief history of 3-D and
visual perception.  


>>I always refer to the flat 2D pictures, on screen and printed, as 
>>"so-called 3D". The programmers however, and most people from the 
>>"ray tracing community", call these mono-pictures: 3D.

>>In a talk on similar pictures a few years ago, I have argued that, 
>>when this computer output is called "3D", the perspective drawings 
>>and paintings from the Renaissance on *also* should be called "3D". 
>>But there is a difference, *in the computer* many of these programs 
>>use a true 3-dimensional representation of objects. The x, y and z 
>>coordinates of points are indeed in the computer's memory.

>>People from the cyber-graphics community like to see themselves as the
>>pioneers of this age. The fact that they call the flat 2D on-screen 
>>output "3D" says a lot about them. They obviously think that the 2D
>>image, brought to their *own* mind when they look at the monitor, is 
l>>ess important than the 3D "object" which is in the "mind" of the 
>>*computer*. But when they really *are* the pioneers, it means that 
>>man in this age is going to identify himself with a computer.

Abraham, what many readers on the P3-D list are aware of and that you 
may not be is that those persons representing the cyber-graphics 
community (which I have no connection to) are closer to being correct 
than you realize.  I discovered, in 1985, that with 15 minutes of practice 
it is possible to train your vision to make any 2-D picture appear to be 
fully three-dimensional. In other words, the picture will appear to be truly 
stereoscopic.  Apparent depth will extend to infinity and each element 
within the picture will be perceived in its proper depth relationship 
relative to other picture elements. Professor Bela Julesz experienced 
the effect in 1989 and named it the Dunkley Effect. 

Yes, I know the above statement is hard to believe but a handful of P3-D 
list members can and have verified the basic thrust of my comments.   
These members have not however experienced the advanced 3-DVG 
optical device.   The advanced 3-DVG unit consists of two hollow 
rectangular tubes with matched optical frames on one end and optical 
quality variable apertures on the other. No reflective or refractive optical 
elements of any kind are involved.  The final 3-D stereoscopic results
are stunning.

More information is provided on the 3-DVG home page at:

http://members.aol.com/kendunkley

Respectively submitted

Ken Dunkley
kendunkley@xxxxxxx


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