AutoStereoscopic 3D is any method of displaying stereoscopic images (adding binocular perception of 3D depth) without the use of special glasses on the part of the viewer. It is based on sending imagery to multiple regions of viewing at once, thus enabling several viewing zones. This is implemented in the most flat panel displays (Parallax barrier & Lenticular lens), because it allows simultaneous viewing for multiple viewer. And, these advances will provide the viewer with the natural feeling of being present in the real scene without glasses in TV.
Examples of AS3D displays technology.
· Pic 1 : Parallax Barrier
A parallax barrier is a device placed in front of an image source, such as a liquid crystal display, to allow it to show a stereoscopic image or multi-scopic image without the need for the viewer to wear 3D glasses.
· Pic 2 : Lenticular Lens
A lenticular lens is an array of magnifying lenses, designed so that when viewed from slightly different angles, different images are magnified.
A disadvantage of the technology is that the viewer must be positioned in a well-defined spot to experience the 3D effect. Another disadvantage is that the effective horizontal pixel count viewable for each eye is reduced by one half.
Ultra High-Definition(UHD) TV for AS3D
To supplement a disadvantage of the technology, there is research attempting to improve these limitations and to show effective image in TV. So that it developed Ultra high definition television (also known as UHDTV 4K, 8K) and it would be used for displays that have an aspect ratio of at least 16:9 and at least one digital input capable of carrying and presenting native video at a minimum resolution of pixels, it includes 4K UHD (2160 P) , 8K UHD(4320P). As a result it can watch optimized 3D image without any glasses in UHD.
Single View Vs. Multi View
Movement parallax refers to the fact that the view of a scene changes with movement of the head. Thus, different images of the scene are seen as the head is moved from left to right, and from up to down. Many autostereoscopic displays are single-view displays and are thus not capable of reproducing the sense of movement parallax, except for a single viewer in systems capable of eye tracking. Some autostereoscopic displays, however, are multi-view displays, and are thus capable of providing the perception of left-right movement parallax. Eight and sixteen views are typical for such displays. While it is theoretically possible to simulate the perception of up-down movement parallax, no current display systems are known to do so, and the up-down effect is widely seen as less important than left-right movement parallax. One consequence of not including parallax about both axes becomes more evident as objects increasingly distant from the plane of the display are presented, for as the viewer moves closer to or farther away from the display such objects will more obviously exhibit the effects of perspective shift about one axis but not the other, appearing variously stretched or squashed to a viewer not positioned at the optimum distance from the display.
Multi-View 3D Plus is a video conversion solution for Multi-View and glasses-free AS3D (Autostereoscopic 3D).
Using the Multi-View 3D Plus, any 2D as well as S3D (stereoscopic 3D) video stream can be converted and stored on Multi-View AS3D video, enabling new applications where AS3D content is a few and expensive. This makes content widely available for glasses-free AS3D displays and offers new options for glasses-free AS3D applications especially for UHD 3D.