P3D Re: Instant Anaglyphs

[Brian Reynolds <reynolds@xxxxxxxxx>]

Tom wrote:
> Brian Reynolds asked:
> 
> >Assume I built a box camera (to take a Polaroid 4x5 film
> >holder/processor) with two pinholes (or lenses) at the proper
> >distance (lets say 60mm).  If I then covered the left pinhole with
> >a red filter and the right with a blue filter and shoot with color
> >film, will I get a proper anaglyph (i.e., not pseudo)?
> 
> It sounds like a fine idea, except that it won't work.  Ain't it
> always like that?  You wouldn't get a good anaglyph, stereo or
> pseudo.  Using this scheme you would obtain color separations, not
> anaglyphs.
> 

Actually I planned on using color separation filters.

> In other words, imagine what happens if you shoot a photo of a red
> and white striped ball.  To the green lens, it looks BLACK and
> green!  To the red lens, it's solid red.
> 

Well perhaps I was unclear about one of the camera details.  I
intended to have both the left and the right pinhole expose the same
piece of film with no septum or other separating device.  The image
formed by the red and green pinholes should merge to form a single
image.

> And it doesn't matter because, the images would not be oriented
> correctly, as you guessed. (Realist format users are frustrated by
> their inability to freeview a film strip for the same reason.)  Then
> there is another problem.  This arrangement would yield two images
> spread far apart, instead of one on top of another like an anaglyph.
> 

What if I put the red filter on the right pinhole and viewed with the
red filter over my left eye?

> I considered the same idea, until I thought about it more.  Dang, it
> was a good idea til then.  :^)

Most of my ideas are pretty good until I sit down and think about
them.  :)

-- 
Brian Reynolds                  | "Humans explore the Universe with five
reynolds@xxxxxxxxx              |   senses and call the adventure science."
http://www.panix.com/~reynolds/ | - Edwin P. Hubble


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End of PHOTO-3D Digest 2890
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