Anaglyph [an-uh-glif] images are used to provide a stereoscopic 3D effect, when viewed with 2 color glasses (usually red and cyan). Video games, theatrical films, and other media can be shown in the anaglyph 3D process. Practical images, for science or design, where depth perception is useful, include the presentation of full scale and microscopic stereographic images.
Examples from NASA include Mars Rover imaging, and 3D images of the sun. Other applications include geological illustrations by the USGS. A recent application is for stereo imaging of the heart using 3D ultra-sound with plastic red/cyan glasses. Anaglyph images are much easier to view than stereograms, but don’t render colors as accurately. Recently, cross-view prismatic glasses with adjustable masking have appeared, that offer a wider image on the new HD video and computer monitors.
The Daily Omnivore 
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