[mythtv-users] OT: Why 3D TV won't work.
Douglas_Peale at comcast.net
Thu May 27 02:30:35 UTC 2010
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On 05/26/2010 06:42 PM, Raymond Wagner wrote:
> On 5/26/2010 21:04, Jean-Yves Avenard wrote:
>> On 27 May 2010 03:29, Gabe Rubin<gaberubin at gmail.com> wrote:
>>> I don't think this is a fair comparison. You are talking about
>>> perceiving 3D from a 2D image or seeing 3D in a real 3D environment.
>>> I would imagine the tricks to convince the eye and brain that
>>> something is in 3D for the former is much different than the natural
>>> way the brain has been trained through millions of years to perceive
>>> 3D in the world around us.
>> I don't see why there would be some fundamental differences between
>> looking at a real environment, and looking at a 3D TV
> Because it's not a 3D TV, it's just one that displays two different
> viewpoints. Your eyes are hard-wired to adjust both focus and
> convergence simultaneously. Since '3D' TVs only adjust the convergence,
> but not focus, you have to consciously work to keep focus constant,
> which causes strain and headaches.
As long as they don't attempt to make things appear to be in front of the screen in a 3D presentation (always a bad idea), the
focus offsets are small. If the human vision system could not deal with small focus changes, it would be impossible to use
glasses to correct vision, because glasses change the focus point.
Done right, 3D TV will be no worse than looking through a window.
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