P3D Re Cardboarding

[abram klooswyk <abram.klooswyk@xxxxxx>]

Gabriel Jacob, P3d 3770, 06 Mar 2000:
>Sorry for the delay in replying. 
>I usually take a day off on Sunday's from the P3D 
>discussions, to recharge my batteries! ;-)

I on the other hand try to keep P3d discussions on
Sunday's, so sorry for the delay :-).

Gabriel quotes from 
http://www.itc.co.uk/mirage/Standard/glos.htm :
>> Cardboarding: A defect occuring in stereoscopic images, 
when because of inadequate depth resolution, a scene divides 
into a small number of separated planes in depth (like 
cardboard cut-outs), instead of the planes being continously 
linked as in normal vision.<<

and he asks: >Bruce or Abram might have something to share? 
             >Or the gang at ISU?

Quoting unauthorized from the forthcoming ISU glossary:
>>Cardboarding (colloquial)  
-  A condition where objects appear as if cut out of cardboard 
and lack individual solidity. 
Usually the result of inadequate depth resolution arising 
from, for example, a mismatch between the focal length of the 
taking lens, the stereo base and/or the focal length of the 
viewing system.<<

A part of these two definitions is similar, which is 
understandable when you know that Charles W. Smith is involved
as author or advisor of/to both glossaries. 
However, the descriptive part was almost the same in 
Dalgoutte's 1967 glossary.
The draft of the ISU glossary adds possible causes, which of
course can and will be disputed. But I agree with Gabriel's
views on the subject. (It remains doubtful whether a glossary 
should go beyond descriptions)

Abram Klooswyk