RE: [GDAlgorithms-List] Re: [Algorithms] Scale, camera, and world units and how it affects perception

[Pallister, K. <kim...@in...>]

Probably off-topic, but a neat little tidbit to add. If you are working with
stereo display devices, you can get people to perceive scale differently by
changing the distance between the position of the left & right view
frustums.

The place I saw this trick was in an IMAX movie where they showed you some
people in a boat, and then a miniture replica of the boat. When they zoomed
in on the miniature (which really did look like a 6" model) you saw people
moving and realized it was the same real boat.

The reason this happens is that you interpret the stereo image pair as
though the distance between the two viewpoints is the distance between your
two eyes. However, if they move the cameras a foot apart, your brain assumes
everything is like 1/4 scale More if you have eyes that are too close
together :-)

Kim Pallister

We will find a way or we will make one.
                     - Hannibal


> -----Original Message-----
> From: Patrick E. Hughes [mailto:hu...@tr...]
> Sent: Friday, July 14, 2000 1:38 PM
> To: Algorithms List
> Subject: [GDAlgorithms-List] Re: [Algorithms] Scale, camera, and world
> units and how it affects perception
> 
> 
> >fact that the camera is higher above the ground on the 
> human?  I mean,
> >if the human stuck his eye on the ground level with the 
> ant's viewpoint,
> >doesn't the human still see more of the terrain than does the ant?)
> 
> No.  You can realistically get your eye down to hound-dog 
> level though by
> laying flat out on the ground, ants way too low for a good example.
> 
> This is why all Hollywood special effects done with miniature 
> models work
> OK and the resulting shot doesn't look horribly out of place..
> 
> 
> 
> 
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