Anaglyph or anaglyph images with two-dimensional images capable of producing a three-dimensional effect when viewed with special lenses (different color lenses for each eye).
Historia
They are based on the phenomenon of synthesis of binocular vision and was patented by Louis Ducos du Hauron in 1891 with the name of this article. Anaglyph images are composed of two layers of color, superimposed but slightly moved relative to each other to produce the depth effect. Usually, the main object is in the center, while the surrounding object and the background are moved laterally in opposite directions.
The image contains two filtered images per color, one for each eye. When viewed through the Anaglyph Glasses, a three-dimensional image will be revealed. The visual cortex of the brain fuses this into the perception of a scene with depth. In a red-blue anaglyph (good, really cyan, which is the complement of red) for example, the eye covered by the red filter sees the red parts of the image as "white" and the blue parts as "dark" The brain produces the adaptation of the colors). On the other hand, the eye covered by the blue filter perceives the opposite effect. The rest of the composition are perceived the same by the eyes. The brain fuses the images received from each eye, and interprets them as an image with depth.
