Implementation of autostereoscopic HD projection display with dense horizontal parallax

摘要

A projector array-based 70-inch screen display, which is our first prototype, has a smooth horizontal parallax and gives a dense viewpoint interval that is narrower than half of the interocular distance. Our final goal is to develop advanced autostereoscopy so that viewers are not compelled to wear 3D glasses and can avoid watching under insufficient resolution. We believe that larger screen size, higher image quality, and such natural image appearances as motion parallax and multiple viewer capability are priority targets for professional 3D display applications. By combining a proprietary screen and our developed projector array, we've designed and implemented a kind of autostereoscopic projection display. Enough pixels to render true high definition are assigned for every viewpoint. The initial implementation has more than 100 million pixels. The actual observed horizontal motion parallax is smooth and reduces flipping. This feasibility study clarified the following two factors: the strong requirement of an array friendly feature ready projector, and the existence of some image glitches. The appearances of moires and ghost images are the most significant factors of visual fatigue in our implementation. Some of these problems were tackled and suppressed. The projectors for the array must be prepared to manage color space, brightness, geometric image compensation, and accurate frame synchronization. Extracting and examining the practical problems with an autostereoscopic projection display are the first steps of our feasibility study. Our goal is to establish an autostereoscopic display with natural and superior horizontal parallax.