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We present an end-to-end system capable of real-time capturing and displaying with full horizontal parallax high-quality 3D video contents on a cluster-driven multiprojector light-field display. The capture component is an array of low-cost USB cameras connected to a single PC. RawM-JPEG data coming fromthe software-synchronized cameras are multicast over Gigabit Ethernet to the back-end nodes of...
We present the principal aspects and the concept of a monocular combination of a scanning 3D time-of-flight sensor with a large-scale conventional 2D image sensor. While the 2D sensor profits from the whole field of view of an F-Mount photo film format lens, the smaller-sized 3D sensor is mounted onto a highly precise XY linear move stage. Thus, by the means of macro-scanning, the 3D sensor can be...
Virtual view synthesis has been considered as a crucial technique in three-dimensional television (3DTV) display, where depth-image-based rendering (DIBR) is a key technology. In order to improve the virtual image quality, a method without preprocessing the depth image is proposed. During the synthesis, the hole-flag map is fully utilized. A Horizontal, Vertical and Diagonal Extrapolation (HVDE) using...
This paper presents the design of a high-performance processor used for head-mounted display (HMD) applications targeting stereo video processing. The proposed hardware architecture of the video processor consists of three major parts: an adaptive 3-dimensional (3D) video decoder to accurately decoding the stereo composite video base band signal (CVBS) source, a video source separation module to generate...
Multi-view depth estimation is an important part in the virtual view synthesis and depth map coding within the 3DV/FTV applications. However, existing depth estimation methods generally have difficulty to generate good depth results around object edges or in areas with less texture. To solve this problem, we propose an improved algorithm to obtain a smooth and accurate depth map for view synthesis...
Subtractive crosstalk cancelation is an effective way to reduce the appearance of ghosting in 3D displays. However, effective cancelation requires the black level of the input images to be raised above zero, which reduces the image contrast and visual quality. Previous methods for selecting the raised black level do not consider the image content; they are either based on the worst case or they do...
A novel hardware implementation of an omnidirectional image sensor is presented which is capable of acquiring and processing 3D image sequences in real time. The system consists of a hemispherical arrangement of a large number of CMOS imagers, connecting to a layered arrangement of a high-end FPGA platform that is responsible data framing and image processing. The hardware platform in charge of real-time...
A novel method named digitized holography is proposed for 3D display systems. This is the technique replacing the whole process of classical holography with digital processing of optical wave-fields. The digitized holography allows us to edit holograms and reconstruct spatial 3D images including real-existent objects and CG-modeled virtual objects.
We propose a novel and practical stereo rectification method. The method is both simple and efficient for 3D content creation, especially for 3D post-production. The major contribution of this paper is rectifying the stereo video with a nonlinear deformation considering the gravity orientation, which helps producing view-reasonable and non-gap content instantly. In our framework, a new projective...
In collision warning systems for automotive applications the response time of a system is very important, since a precise response is useless if it comes too late. In this paper a fast collision warning system is presented, which uses a stereo camera as a sensor. The used algorithms allow a fast response of the system by making use of parallel processing. The parallel processing algorithms have been...
This paper describes objective and subjective display-related measurement methods to evaluate the performance of a laser illuminated head tracked auto-stereoscopic display. Essential characteristics are speckle, exit pupils and crosstalk. The described methods are used to evaluate a first prototype of an auto-stereoscopic display developed within the European Union-funded HELIUM3D project.
We introduce a scheme for the production of LDV (Layered Depth Video) content, based on capturing from a hybrid camera system, consisting of two time of flight and five CCD cameras and introduce a post production step, based on Grab - Cut segmentation, which significantly improves the quality of the end result. The proposed improvement step can be done fully automatically, based on initialization...
This work proposes an interactive tool for creating stereo image from a mono image. The user interaction is defined as scribbling on the object of interest followed by relative depth assignment to the selected object. Initial step in the algorithm is to create structured image oversegments with intensity homogeneity and geometrical convexity constraint. The final image segmentation is realized by...
This paper presents an approach for rendering heavily extrapolated novel views to be used as input for light-field displays. This view generation method builds on a combination and enhancement of existing methods. The interpolation quality is assured by detecting and keeping the most reliable gap area information from the content using depth layers. Concerning the extrapolation process, which is the...
Phase-shifted sinusoids are commonly used as projection patterns in structured light systems consisting of projectors and cameras. They require few image captures per 3D reconstruction and have low decoding complexity. Recently, structured light systems with a projector and a pair of stereo cameras have been used in order to overcome the traditional phase discontinuity problem and allow for the reconstruction...
We propose a method of filtering depth maps provided by Kinect depth camera. Filter uses output of the conventional Kinect camera along with the depth sensor to improve the temporal stability of the depth map and fill occlusion areas. To filter input depth map, the algorithm uses the information about motion and color of objects from the video. The proposed method can be applied as a preprocessing...
Multiview 3D videos can efficiently be represented using a mixed resolution multiview 3D video format that has a number of color and depth information with different resolutions. However, such a mixed resolution multiview video format would have a shortcoming on synthesizing virtual views between a low and a high resolution view. This paper provides an approach to synthesize virtual image from multi-view...
We propose an expanding method for viewing window in the integral floating display with the tilted side mirrors. These additional mirrors make some rays change the propagation direction, and the reflected ray has large propagation angle compared with the conventional system. Because the maximum propagation angle of ray determines the viewing window size, the proposed system can enlarge the viewing...
The present work analyses a layered depth-image-based-rendering algorithm based on possible errors occurring with perspective 3D warping. The outcome is improvements to the algorithm that treats depth reliably for scenes containing several levels of foreground objects. The filling of holes of different kinds is addressed so that results have better visual quality. The analysis compares the results...
We propose a novel 2D to 3D scheme by considering perceived 3D experience caused by occlusion and visual attention. In this scheme, initial depth model, the saliency map of visual attention and occlusion analysis are integrated in depth calculation. Mean-while, characteristics of human visual system are also considered as weight factors. Then, depth normalization and refining are implemented. The...
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