 However, these examples do not employ any of the stereoscopy techniques that characterize phantograms.A patent for a technique that uses anaglyph and stereoscopic images was filed in 1926 by inventor Alfred John Macy ().This described rotation of an image with respect to a second, as required to present the illusion of depth from a particular vantage point, and presented different images, but with no anamorphic process to correct proportions, to the viewer's left and right eyes using color filters.