MAKING ANAGLYPHS - Re: [photo-3d] Taking Digital Stereo pairs with Kodak DC260

["Dan Shelley" <dshelley@xxxxxxxxxxxx>]

Welcome to the list Bruce!

I am including a set of instructions for making anaglyphs here. I used this
procedure to make an anaglyph of one of your images -
http://members.xoom.com/fortbruce/buffnews/may2000/stereos/yosemiteST8.jpg
which can be seen at - http://www.dddesign.com/temp/yobw.jpg in black and
white and http://www.dddesign.com/temp/yobw.jpg in color. These were made
VERY quickly to give examples, more probably could have been done with them,
but you can get the idea.

- - - - - - - -

- 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 anaglyphs  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 look like 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
overlaid/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 will 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





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