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In view of structure similarity between depth and texture in multiview video plus depth, efficient depth intra-coding with the aid of texture information has received a lot of attention. In this paper, a new depth-texture cooperative clustering method is first proposed for cluster-based depth prediction (CBDP) by exploiting the similarity. Due to inaccuracy of depth maps and the resulted texture-depth...
Compressed sensing has shown great potential to speed up magnetic resonance imaging (MRI) assuming the image is sparse and compressible in a transform domain. Conventional methods typically use a pre-defined sparsifying transform such as wavelets or finite difference, which sometimes does not lead to a sufficient sparse representation. In this paper, we design a patch-based nonlocal operator (PANO)...
The Cave Automatic Virtual Environment (CAVE) system is a fully immersive virtual reality system, which can provide users with a realistic experience and a large freedom of interactions. In this paper, we propose vDesign, a CAVE-based virtual design environment using finger interactions. Specifically, we focus on the function of image segmentation and composition in the vDesign system. In vDesign,...
The paper focuses on 3D structure and motion factorization from uncalibrated image sequences. An alternative weighted factorization algorithm is proposed to handle noisy image measurement. The novelty and main contributions of the paper are as follows: (i) A simple while accurate quasi-perspective projection model is adopted for structure and motion factorization; (ii) feature uncertainties are estimated...
Phase measuring profilometry is a method for measuring the 3D profile of objects. The method is known for its accuracy and high speed. In real world applications, however, the 3D reconstructions of the high-contrast regions have large measurement errors due to the smoothing effect by digital cameras. In this paper, we model the smoothing as a mathematical smooth mask applying process. Accordingly,...
To overcome the phase error caused by the partial intensity saturation in phase measuring profilometry, this paper studies the relative phase error caused by partial saturation. Moreover, an improved algorithm for phase reconstruction with partial saturated intensity is proposed. Compared with other phase-recovering methods, the improved algorithm is not limited to saturation coefficient. Finally...
Depth-image-based rendering (DIBR) has attracted more and more attention as a method of virtual view rendering in three-dimensional video (3DV) applications. Many efforts have been dedicated to realize high-quality rendering, ranging from pre-process of the reference depth images to post-process of the virtual texture images. A DIBR method based on inverse mapping and depth-aided image inpainting...
Acoustic sensor arrays are recognized as an important development for field studies of animal behavior and ecology. While birds live in a 3D world and all dimensions seem important for most birds, use of these arrays has been limited almost entirely to 2D. A notable exception was the development by S. Asgari of Approximate Maximum Likelihood methods for 3D, tested with recorded sounds. Here we describe...
Multi-atlas based approaches are effective for the medical image segmentation. The strategy of assigning weights for the atlases is critically important to the segmentation performance. Previous works either assign weights on the image level or assign weights of different regions independently, i.e., they can't employ the uniqueness of each region and the connectivity among different regions simultaneously...
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