Re: Parallax differences...

[P3D Eric Goldstein <egoldste@xxxxxxxxxx>]

P3D wrote:

> ... are the primary determinant in stereopis. Well, to be exact, the rapid
> comparison of parallax differences.
> 
>      I am convinced by the following "proofs":
> 
> Fix your gaze on an object... do not move your head!... do not shift your
> gaze from the object!


I believe that this is virtually impossible to achieve for a number of reasons, 
including our biological tendency to exhibit small unconsious "scanning" eye 
movements no matter how hard we try to "fix" our gaze.

This (among other more consequential reasons) is why the many and varied 
discussions of real time perception versus single fixed image perception (that 
is, comparing "life" in real time to a fixed "snapshot" or recording of life) 
whether it be stereo, plano, sight, sound, olefaction, whatever, is not a 
meaningful one. Even if a proper "apples to apples" comparison could be achieved 
in a rigorous test environment, it is unclear what relevence it would have in 
the "real world" of perception and imaging.

People use "real time" analyses in their perceptions of incoming stimuli. 
Studying the mechanisms involved with "fixed" image perception is certainly 
interesting, but not necessarily fruitful in yielding much insight into what 
happens in real time.


Eric G.
egoldste@xxxxxx


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