Stereoscopic analysis

GRASS 5

There is an old GRASS 5 software in http://grass.osgeo.org/outgoing/grass5/ -> stereo

which is doing this job. It is yet awaiting integration into GRASS 6.

Tutorial: http://grass.osgeo.org/gdp/stereo-grass/index.html

GRASS 6

There is a d.anaglyph addon module for an easy way to greate 3D anaglyphs for use with red/cyan glasses. It uses the m.nviz.image module to render two viewpoints, then from those composes the 3D image into a PNG file. It should be possible to port that functionality into NVIZ itself.

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Anaglyph

Red/cyan anaglyph created with the d.anaglyph module

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Stereogram

Stereogram created with the d.anaglyph module (requires stereoscope viewer)

Stereoscope viewer

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"Free-view" Stereogram

• No special viewing equipment needed: just cross your eyes.

See also

• Stereo anaglyphs wiki page
• Principles of Photogrammetry: Stereoscopic Parallax
• nasa/StereoPipeline: The NASA Ames Stereo Pipeline is a suite of automated geodesy & stereogrammetry tools designed for processing planetary imagery captured from orbiting and landed robotic explorers on other planets