P3D Re: Anaglyph creation

[Dan Shelley <dshelley@xxxxxxxxxxxx>]

You are very welcome. Glad to pass tat knowledge along! =)

My comment about converting to B&W first is to reduce the number of
colors in the resulting anaglyph to reduce eye strain. Some color
anaglyphs are fine, but those with highly bright spots, or items that
contain red or blue in them cause differences in what is seen by the
viewer.

The trick to doing the B& W thing correctly is to convert each image to
a grayscale version, then convert that grayscale iamge back to RGB. (It
will still look B&W, but will be made up of the RGB channels.) This way
you end up with a smoother looking anaglyph - most of the time. 

Have fun!

Dan

Frederick Greenspan wrote:
> 
> Thanks to Dan Shelley for his excellent instructions! We didn't get it
> at first, trying to follow his details after we already converted our
> images to b&w. Once we tried WITHOUT going to b&w, we got our first
> anaglyph - and it was in color! I still don't understand how we could
> succeed at this when most of the anaglyphs on the net are B&W (maybe to
> make the files small enought to load in reasonable time). Anyway, thank
> you!
> 
> > Date: Thu, 14 Jan 1999 22:00:36 -0700
> > From: Dan Shelley <dshelley@xxxxxxxxxxxx>
> > To: photo-3d@xxxxxxxxxxxxxxxxx
> > Subject: P3D Re: anaglyphs
> > Message-ID: <369ECB74.B67@xxxxxxxxxxxx>
> 
> > Hi Fred,
> >
> > Here is the VERY quick version of the instructions. NOTE: horizontal and
> > vertical alignment is crucial...
> >
> > Split the RGB channels of the left image, then copy the R from that
> > image.
> >
> > Split the RGB channels of the right image, then paste the R from the
> > left image over it - BUT - before you finalize that paste, set the
> > paster R to 50% transparency so you can align it to the view you are
> > pasting over. A good rule of thumb (that will nto be best in all
> > situations, but is a good place to start) is to set it so that an object
> > in the view that is closest to the camera lines up with it's
> > counterpart. Set it back to 100% (non-transparent) and recombine the RGB
> > parts of the right image.
> >
> > Trim away "bad" edges and voila!
> >
> > Enjoy!! =)
> >
> > Dan Shelley
> > dshelley@xxxxxxxxxxxx
> > http://www.dddesign.com/3dbydan


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