3-D displays and signal processing - An answer to 3-D ills?

There exist different ways to produce 3D displays today. One method is planar stereoscopic displays which involves placing two drawings in front of viewer eyes and separating them by a mechanical barrier, known as the stereoscope which delivers two 2D images through partitioned optical channels to a viewer's eyes. Stereoscopic effects can also be achieved through the use of glasses which utilize filters or shutters, one for each eye of each viewer to present left and right channels of view information from a single display or screen. In Autostereoscopic displays, spatial multiplexing is applied to the left and right images in combination with a light-directing mechanism that presents those views to the viewer's eyes. The two major multiplexing techniques are parallax barrier displays and microlens displays. Another 3D generation method is active multiview displays which provide motion parallax by tracking the viewer's location, generating two appropriate views for the viewer's eye and using an optical mechanism. The other is passive multiview 3D displays which displays all views simultaneously by means of spatial multiplexing. Holographic displays incorporate diffraction as an underlying component of image formation. The other methods of displaying 3D include holographic video, volumetric displays, holographic optical elements, swept-volume displays, information reduction, static volume displays and occlusion and mid-air projection.