PDA

View Full Version : reversing a stereogram


CourtJester
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.

EricChadwick
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.
http://www.ibmr.net/

Here's a research paper on capturing heights from photos.
http://www.cee.hw.ac.uk/texturelab/projects/virtex/demo/bmpcapture.html

There are some cameras out there that take a z-depth image.
http://www.3dcgi.com/cooltech/cameras/cameras.htm
I'd love to have one of these!

CGTalk Moderation
01-17-2006, 04:00 AM
This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.