Anaglyph 3D is the name given to the
stereoscopic 3D effect achieved by means of encoding each eye's image using filters of different (usually chromatically opposite) colors, typically
red and
cyan. Anaglyph 3D images contain two differently filtered colored images, one for each eye. When viewed through the "color-coded" "anaglyph glasses", each of the two images reaches the eye it's intended for, revealing an integrated
stereoscopic image. The
visual cortex of the brain fuses this into perception of a three-dimensional scene or composition.