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Subject : [Anaglyphs] Ghost and Diplopia
From : "dr.Zsolnai-Nagy Imre"
To :
Date : Sat, 14 Jul 2007 22:46:49 +0200

31108_Stereo0011ana_re_iw.jpg : (405K)

Hello dear friends!
I come back a little bit with the stereo-geometry, sorry.
A lot of works are talking about the diplopia and ghosts on the stereo images.
I think that the ghosts and the diplopia are two different things, while the articles sometimes writing that they are similar.
I sent this image and you can see a little ghost on the left horn of the cow. This is the ghost, result of the anaglyph technic.
But: when you see the horns, you see the background with diplopia, or when you see the background, you see with diplopia the horns.
This is disturbing??? For me on this image this isnt a disturb. Perhaps this is only my opinion.
If this cow is "without horns": the image will be perfect. OK? I shoted this image with 50 mm focal and 15 cm of stereo-base. The nearest point was at 3 meters circa....
This effect of the horns is the OCCLUSION, I think...
Using a shorter base, the diplopia can avoid, but the same time the depth effect will be less...?!
I found a very good article about the stereo rules here:
http://acm.org/sigchi/chi95/proceedings/papers/cw_bdy.htm
 
 
              Cheers: Imre

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