[opendtv] Re: opendtv Digest V7 #147
- From: Tom Barry <trbarry@xxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Sun, 20 Jun 2010 08:31:43 -0400
Albert Manfredi wrote:
> ...
> Enfin bref, I THINK that even if you interpret these effects as simple
> sampling theory, the brain seems to react differently to different stimuli.
> My bet is, the brain is smart enough to spend a lot less processing time on
> easy situations (e.g. low sampling rate), and to assign more processing power
> to difficult cases.
>
> Bert
>
In my own humble and totally non-scientific opinion I think the human
perceptual system has evolved a bazillion special purpose recognizers
for things that are of interest to us, such as finding food, mating
partners, and shelter, avoiding danger, and a very large part for
communicating and cooperating with each other to jointly achieve such
goals. It may not be easy to study one such sub-system without
understanding the interaction with the others.
For instance, how much of the HVS is just optimized to read postures and
facial expressions on other humans?
And I'm not sure whether I completely buy the idea of discrete visual
temporal sampling. It seems if we were doing this then some real world
(non-TV) wagon wheels would appear to be moving backwards when rotating
at certain speeds. Excluding situations under flickering lighting I
don't think I have ever observed such. Has this been studied?
Finally, I guess I don't really understand POV. Would it really be
distinguishable from the temporal low pass filtering caused by analog
processing delay?
- Tom
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