Multi-view Stereoscopic Display Research Articles

A new rectification scheme for uncalibrated stereo image pairs and its application to intermediate view reconstruction

In this paper, a new rectification scheme to transform the uncalibrated stereo image pair into the calibrated one is suggested and its performance is analyzed by applying this scheme to the reconstruction of the intermediate views for multiview stereoscopic display. In the proposed method, feature points are extracted from the stereo image pair by detecting the corners and similarities between each pixel of the stereo image pair. These detected feature points, are then used to extract moving vectors between the stereo image pair and the epipolar line. Finally, the input stereo image pair is rectified by matching the extracted epipolar line between the stereo image pair in the horizontal direction. Based on some experiments done on the synthesis of the intermediate views by using the calibrated stereo image pairs through the proposed rectification algorithm and the uncalibrated ones for three kinds of stereo image pairs; ‘Man’, ‘Face’ and ‘Car’, it is found that PSNRs of the intermediate views reconstructed from the calibrated images improved by about 2.5 ∼ 3.26 dB than those of the uncalibrated ones.

ステレオ画像投射方式の繰返し複数視点ホログラムスクリーンディスプレイ

This paper discusses multi-view technology for a projection-type stereoscopic display. The multi-focal screen of this display employs the diffractive function of a Holographic Optical Element (HOE). For three dimensional (3D) displays to be viewable without special glasses, multi-view is very important, and this requirement is difficult to meet because the wide viewing area conflicts with the separation of viewing area between the right and left eyes. Holography is suitable for developing such an optical device. The display is a recursive multi-view stereoscopic display that uses multiple mirrored focal point HOEs. The advantage of this display is that it doesn't require mixing of stereoscopic images. The configuration is very simple because of the type of projection. The stereoscopic images from two cameras can be directly observed without editing them. The display lets more than one observer view the same 3D image at the same time.

３次元映像情報メディア技術 １次元光源列の回転走査による全周形リアルタイム３次元ディスプレイ

The multi-view stereoscopic display has several merits such as requiring no special glasses and providing motion parallax. Since existing displays have flat screens, observers can not watch images from behind. If a multi-view stereoscopic display which has a cylindrical screen is developed, it would enable observers to watch the stereoscopic image like a multiplex hologram from all the horizontal directions around it. But it is difficult to make a cylindrical multi-view stereoscopic display with conventional technology such as a lenticular sheet and two-dimensional spatial light modulators such as LCD or CRT. Therefore we propose a new type of three-dimensional display, which has a cylindrical parallax barrier and a one-dimensional light array which consists of semiconductor light sources in a vertical line. The light array rotates along the cylindrical parallax barrier and its intensity is modulated synchronously. We have developed an experimental display and we confirmed that we can watch different images from all the directions surrounding.