Autostereoscopic Visualization

Autostereoscopic 3D Display with a Long Viewing Distance
　A unique technique for displaying 3D images for distant viewing of an autostereoscopic image without the need for special glasses was proposed (Liao et al., Optics Letter 2005). This so called photo-based integral photography method enables precise 3D images to be displayed at long viewing distances without any influence from deviated or distorted lenses in a lens array. The elemental images are calculated from a referential viewing area for each lens, and the corresponding resulting images are projected onto a photographic film through each lens (Liao et al., IEEE TVCG 2011). Dr. Liao and his colleagues have succeeded in creating an image display that appears to have three-dimensionality even when viewed from a distance, with an image depth of 5.7 m or more in front of the display, and 3.5 m or more behind the display. The developed long-distance 3D display is technically unique since it is the first one that can generate an image with such a long viewing distance. This work has been reported by multiple international media from the USA, the UK, Germany, Russia, and Japan (See MEDIA COVERAGE). 　

High-resolution Autostereoscopic Display and High-speed / High-quality Interactive 3D Imaging System
　　A high-resolution stereoscopic surgical display using the IV technique and multiple projectors was developed with the aim of improving the quality of 3D display (Liao et al., Optics Express 2004). The solution for increasing image quality is to use multiple projectors to create a high-resolution image and project the resultant image onto a small screen by using long-zoom-lens projection optics. The main contribution of this development is application and modification of the medical stereoscopic technique originally developed for high-resolution multi-projector stereoscopic display system (Liao et al., Applied Optics 2005). Furthermore, an interactive 3D autostereoscopic image-displaying system for pre-/intra- operative medical image displaying was developed (Tran et al., IJVR 2010), and rotated-prism sheets were used to improve the viewing resolution of IV (Liao et al., Optics Express 2007).