| Re: Anaglyph display by IDL ? [message #1668] |
Wed, 16 February 1994 09:17  |
sterner
Messages: 106
Registered: February 1991
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Senior Member |
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xiaoming@fstgds08.tu-graz.ac.at (Xiaoming Xu) writes:
> is it possible display an anaglyph image pair with IDL?
> Thank you for your answer in advance!
Try using color_quan to combine the left and right images into
one red/green or red/blue image.
For example, suppose your anaglyph viewer has a red filter for the
left eye and a blue one for the right eye. Let the corresponding
images be left and right. Then try the following:
c = color_quan(left, left*0, right, r, g, b)
tv, c
tvlct, r, g, b
This assumes that both images are scaled to the range 0 to 255.
Ray Sterner sterner@tesla.jhuapl.edu
Johns Hopkins University North latitude 39.16 degrees.
Applied Physics Laboratory West longitude 76.90 degrees.
Laurel, MD 20723-6099
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| Re: Anaglyph display by IDL ? [message #1808 is a reply to message #1668] |
Sat, 12 March 1994 06:30  |
jimbrakefd
Messages: 4
Registered: March 1994
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Junior Member |
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I've done anaglyphs in PV~WAVE on both 24-bit and 8-bit color systems.
The 24-bit color approach is straight-forward, one image in red and the
other in green. It works best if you gamma correct or approximately
gamma correct via the lookup tables.
What was suprising is that 8-bit color is ~adequate for anaglyphs. You
have to redo the LUT for 4-bits red and 4-bits green and again it is best
to gamma correct at the same time. The secret is to histogram equalize
the original two images down to 4-bits each.
Jim Brakerfield, previously braker@shadow.brooks.af.mil, now via AOL
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