P3D Re: Anaglyphs in Photoshop

[Dan Shelley <dshelley@xxxxxxxxxxxx>]

> Message text written by INTERNET:photo-3d@xxxxxxxxxxxxxxxxx
> >I Am looking for software to batch produce red & blue anaglyph images.
> I have been directed to Depthcharge Developer studio is any one familiar
> with this product? I also have Photoshop 5.0 with Batch processing.
> Where can I find information for the processing of anaglyph images in
> Photoshop. Any help will be appreciated as I know this is an old subject
> here.<

Dave Harvey's Stereo Image Factory has already been mentioned in
response to this note. I thought I would throw a few more specifics
about manual anaglpyh composing out there to all of you who might want
to make some good anaglyphs.

- - - - -

Here are some generic instructions on how to do anaglyphs manually:

- Load you left image in RGB (Red, Green, Blue) format.

- Load you right image in RGB (Red, Green, Blue) format.

- Convert both images to Grayscale. (Not REQUIRED, but highly
recommended as _most_ color anglyphs have some amount retinal rivalry
when viewed with the red/blue glasses.)

- Convert both images back to RGB. (They will now look like black and
white photos, but will be made up of RGB color information.)

- Split the RGB parts of the left image. (They will looklike three
grayscale copies of the same image with only slight variations in tone,
etc.)

- Copy the R (Red) part of the left image to a "clip-board" or into
memory.

- Recombine the RGB parts of the left image.

- Split the RGB parts of the Right image.

- Paste the R (Red) part of the left image over the R (red) part of the
right image. (if you are using software that lets you set transparency,
set it to 50% and while you can see both images, move the
overlayed/pasted image around (UP AND DOWN AND SIDE TO SIDE) to align
the images. IMPORTANT: Then reset the transparency to zero so that you
only see the pasted image.)

A good hint at this point is to determine what the closest thing in the
image is and line the two R images up using that as a guide. This sets
your "window" at that point. Moving the image a few pixels either way
can modify that window placement, and help to eliminate ghosting... This
will make more sense once you have tried it a few times.

- Recombine the RGB parts of the right image.

- You now have an anaglyph. Trim off any extra "junk" left on the edges
by any non overlapping information from the two original images.

- Enjoy! 

(Remember, if you see too much ghosting - split the channels again - CUT
the red channel - paste it again (it wil go back to the same position
and move it a few pixels to the left or right depending on your
situation and combine again. Do this until you are satisfied with the
results.)

- - - - - - - - 

Any questions?

Dan Shelley
dshelley@xxxxxxxxxxxx
http://www.dddesign.com/3dbydan


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