P3D Re Depth perception cues

[abram klooswyk <abram.klooswyk@xxxxxx>]

John Roberts wrote (PHOTO-3D Digest 3232, 6 Mar 1999) on his
>old list of depth perception cues

If this is meant to become exhaustive I should like an addition 
to "distance-related cues such as haze, brightness": 
color perspective, because this was stressed by Leonardo da Vinci.
You have to see the hills of Tuscany yourself to know how blue
they are in the distance, and how bright yellow and red are
close to you.

>binocular stereo: determining the distance (or relative distance) of an
>object based on the convergence of the eyes, and the disparity (if any)
>of the two views. Note that you don't have to converge on a particular
>object to get an idea of its distance (change in disparity with change
>in convergence is another source of information).

I would suggest to stress more that the perception of the absolute 
distance from the observer, called egocentric distance by 
psychophysiologists, is quite different from relative distance. 
Only the latter is sensed by stereopsis.

Gabriel Jacob quoted (PHOTO-3D Digest 3234, 08 Mar 1999)
>a list of major depth perception cues as outlined in the 
>book, "Perception."
Speaking on quotation, I'm probably a little over doing it, but I like 
quotations with sources which I can find back, also on this mailing 
list (it is nice when you search the archives). 
Is this the book by Irvin Rock, Paperback Reprint edition (August 1995)
                    W H Freeman & Co.; ISBN: 0716760118 ?
If not, please correct.
(There are at least SEVEN different books called "Perception" on sale, 
 see: http://shop.barnesandnoble.com/)

Abram Klooswyk


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End of PHOTO-3D Digest 3266
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