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This work is concerned with the design of two different analog channels for hybrid and monolithic pixels in view of applications to the vertex detector at the SuperB Factory. The circuits have been designed in a 130 nm CMOS, vertical integration technology, which may provide some advantages in terms of functional density and electrical isolation between the analog and the digital section of the front-end...
With the arrival of High Definition Television (HDTV), the TV technology is heading towards 3DTV. Evolution of 3DTV requires the facility of capturing and analyzing the multi-view images and compressing and transmitting massive volume of data through the communication channel. The most sever issue in 3D shape extraction is the roughness of the surfaces. Image focusing is a dominant method of reconstructing...
The 3D reconstruction for freehand 3D ultrasound remains a hard problem because that the recorded B-scans are not only sparse, but also non-parallel (actually they may intersect each other). Conventional volume reconstruction methods can't reconstruct sparse data efficiently while not introducing geometrical artifacts, and conventional surface reconstruction methods can't reconstruct surfaces from...
For future applications like 3DTV and free view point TV, the video data format is likely to comprise of multiple views plus pre-estimated geometric information such as a depth map corresponding to each view. By using multi-view video plus depth (MVD), it is possible to efficiently render virtual views in decoder site. However, the error and packet loss during the transmission will result in the distortion...
We have proposed a panoramic video synthesis method that uses a layered probability mapping method to generate high-quality three-dimensional (3D) images. The method's algorithm required a certain amount of synthesis calculation for estimating the presence of objects within an overall scene.
Given a pair of images, a stereoscopic display should execute the image plane calibration, the depth map estimation, and the multiple views rendering to show a 3-D picture. Among all signal processing stages, the depth estimation is the most critical one. This paper presents a real-time depth map estimation algorithm as well as parallel software architecture based on a GPU processor. The experimental...
We present a multi-view 3D video acquisition and its processing system for multi-view 3D television (3DTV). The proposed hybrid camera system consists of three-color cameras and one time of flight (TOF) camera. Since currently available TOF cameras do not provide color images associated with the depth image, we use a beam splitter between the color camera of the center view and the TOF camera to minimize...
The designed circular holographic display system produces ghost-like 3D optical reconstructions of a computer generated 3D model. System uses six phase-only reflective-type spatial light modulators (SLMs) that are configured circularly. Alignment of the SLMs are successful and gap problem is solved by using half-mirrors. The total number of pixels of the resultant display is 11520 × 1080. Reconstructions...
We implement a viewing angle enhanced integral imaging system by the use of more than one lenslet arrays placed in a curve-like manner. The curve effect providing widened viewing angle is achieved, from the nature that we approximate a curved lenslet array using three flat lenslet arrays. To confirm the feasibility of pickup in real time, a digital reconstruction is carried out. It is revealed that...
Generating in-between images from multiple views of a scene is a crucial task for both computer vision and computer graphics fields. Photorealistic rendering, 3DTV and robot navigation are some of many applications which benefit from arbitrary view synthesis, if it is achieved in real-time. GPUs excel in achieving high computation power by processing arrays of data in parallel, which make them ideal...
We propose an effective virtual view synthesis approach, which utilizes the technology of depth-image-based rendering (DIBR). In our scheme, two reference color images and their associated depth maps are used to generate the arbitrary virtual viewpoint. Firstly, the main and auxiliary viewpoint images are warped to the virtual viewpoint. After that, the cracks and error points are removed to enhance...
The quality of depth maps is crucial for 2D to 3D conversion, but high quality depth map generation methods are usually very time consuming. We propose an efficient semi-automatic depth map generation scheme based on limited user inputs and depth propagation. First, the original image is over-segmented. Then, the depth values of selected pixels and the approximate locations of T-junctions are specified...
This paper presents a method that jointly performs stereo matching and inter-view interpolation to obtain the depth map and virtual view image. A novel view synthesis method based on depth map layers representation of the stereo image pairs is proposed. The main idea of this approach is to separate the depth map into several layers of depth based on the disparity distance of the corresponding points...
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...
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