View Full Version : reversing a stereogram
01-12-2004, 11:29 PM
Does there exist software that can extract a zbuffer from a given stereo pair, either in red-blue format or two separate images?
I have a primitive method in mind using Photoshop and the "difference" layer mode, but it involves some heavy filtering. I'm trying to figure out how to digitize heightfields, like the relief on a coin, so I can turn them into accurate bumpmaps.
01-13-2004, 03:20 PM
An artist posted a tutorial on Discreet's forum awhile back about how to scan a coin with different sets of lighting, to extract a dot-product3 normal map. Here is a zip with all the assets (http://www.ericchadwick.com/examples/normal_mapping_coin.zip). This is normal mapping though, not height. Heightfields are more difficult to get from photographs.
You might try EPHERE 3D.
Here's a research paper on capturing heights from photos.
There are some cameras out there that take a z-depth image.
I'd love to have one of these!
01-17-2006, 04:00 AM
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