Multi-view Autostereoscopic Display Research Articles

Future Directions in 3-Dimensional Imaging and Neurosurgery

Recent advances in 3-dimensional (3-D) stereoscopic imaging have enabled 3-D display technologies in the operating room. We find 2 beneficial applications for the inclusion of 3-D imaging in clinical practice. The first is the real-time 3-D display in the surgical theater, which is useful for the neurosurgeon and observers. In surgery, a 3-D display can include a cutting-edge mixed-mode graphic overlay for image-guided surgery. The second application is to improve the training of residents and observers in neurosurgical techniques. This article documents the requirements of both applications for a 3-D system in the operating room and for clinical neurosurgical training, followed by a discussion of the strengths and weaknesses of the current and emerging 3-D display technologies. An important comparison between a new autostereoscopic display without glasses and current stereo display with glasses improves our understanding of the best applications for 3-D in neurosurgery. Today's multiview autostereoscopic display has 3 major benefits: It does not require glasses for viewing; it allows multiple views; and it improves the workflow for image-guided surgery registration and overlay tasks because of its depth-rendering format and tools. Two current limitations of the autostereoscopic display are that resolution is reduced and depth can be perceived as too shallow in some cases. Higher-resolution displays will be available soon, and the algorithms for depth inference from stereo can be improved. The stereoscopic and autostereoscopic systems from microscope cameras to displays were compared by the use of recorded and live content from surgery. To the best of our knowledge, this is the first report of application of autostereoscopy in neurosurgery.

Segmentation-based adaptive vergence control for parallel multiview stereoscopic images

The vergence control is important for multiview stereoscopic images captured by a camera array to acquire natural and clear stereoscopic effects. In this paper, we derive the basic characteristics of vergence control for parallel multiview stereoscopic images. Then we segment the stereoscopic images based on Mean Shift, and shift the images by the disparity of the object in the central region to achieve the adaptive vergence control. We have evaluated our method on Middlebury data sets and artificially synthesized images. Experimental results show that the proposed method is effective, and the generated stereoscopic images could reproduce the 3D scenes vividly in a multiview autostereoscopic display.

Crosstalk evaluation in multiview autostereoscopic three-dimensional displays with an optimized diaphragm applied

The crosstalk evaluation of multiview autostereoscopic three-dimensional (3D) displays is discussed, with both the human and technical factors investigated via image quality assessment. In the imaging performance measurements and analysis for a multiview autostereoscopic display prototype equipment, it was inferred that crosstalk would have both a positive and a negative effect on the imaging performance of the equipment. The importance of the attached diaphragm in the crosstalk evaluation was proposed and then experimentally verified, using the developed prototype equipment. The luminance distribution and crosstalk situation were given, with two different diaphragm arrays applied. The analysis results showed that the imaging performance of this 3D display system can be improved with minimum changes to the system structure.

Guest Editorial Special Issue on 3D-TV Horizon: Contents, Systems, and Visual Perception

Despite initial skepticism, there is a growing consensus that the broadcast industry needs to seriously consider the pros and cons of providing services for three-dimensional television (3D-TV). In addition to the two-dimensional visual cues of perspective, size, shading, texture, blur, etc., that are offered by standard television images, 3D-TV will provide stereoscopic depth information in the form of disparity signals from paired images for both stereoscopic and multiview autostereoscopic display systems.

다시점 3차원 비디오 재생 시스템 설계 및 구현

This paper designs and implements a multi-view 3D video player system which is operated faster than existing video player systems. The structure for obtaining the near optimum speed in a multi-processor environment by parallelizing the component modules is proposed to process large volumes of multi-view image data at high speed. In order to use the concurrency of bottleneck, we designed image decoding, synthesis and rendering modules in a pipeline structure. For load balancing, the decoder module is divided into the unit of viewpoint, and the image synthesis module is geometrically divided based on synthesized images. As a result of this experiment, multi-view images were correctly synthesized and the 3D sense could be felt when watching the images on the multi-view autostereoscopic display. The proposed application processing structure could be used to process large volumes of multi-view image data at high speed, using the multi-processors to their maximum capacity.

Crosstalk reduction in multi-view autostereoscopic three-dimensional display based on lenticular sheet

Crosstalk reduction in multi-view autostereoscopic three-dimensional display based on lenticular sheet

一种减少柱面光栅自由立体显示图像串扰的方法

A method to reduce crosstalk in multi-view autostereoscopic three-dimensional (3D) displays based on the lenticular sheet is proposed. Correcting the luminance values of each parallax image displayed on the display screen is employed. We analyze the causes of crosstalk. We deduce the formulas of crosstalk reduction according to the relationship between crosstalk coefficients of each parallax image observed through the lenticular sheet, luminance values of each parallax image displayed on the display screen, and luminance values of each parallax image observed through the lenticular sheet at each viewing position. Experimental results verify the effectiveness of the proposed method.

Cross-talk reduction by correcting the subpixel position in a multiview autostereoscopic three-dimensional display based on a lenticular sheet

A method is proposed to alleviate the cross talk in multiview autostereoscopic three-dimensional displays based on a lenticular sheet. We analyze the positional relationship between subpixels on the image panel and the lenticular sheet. According to this relationship, optimal synthetic images are synthesized to minimize cross talk by correcting the positions of subpixels on the image panel. Experimental results show that the proposed method significantly reduces the cross talk of view images and improves the quality of stereoscopic images.

基于SIFT匹配算法的多视点自由立体显示视差图像的生成

基于SIFT匹配算法的多视点自由立体显示视差图像的生成

DMD-based autostereoscopic display system for 3D interaction

A novel approach to implement the multiview autostereoscopic display system is presented. This implementation brings together a high frame rate digital micro-mirror device (DMD) projector, an active shutter, and an optical wedge. It facilitates the modulation of the DMD to achieve extra high frame rate with a trade-off in greyscale resolution. The results have the great potential for commercialising the autostereoscopic display system.