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This paper presents a novel depth map generation method based on geometric information. Our method divides a 2d image into two parts—the foreground and the background. Through extracting the predominant lines and vanishing point of the background, the background depth map is determined. Then we use this depth map as a ‘scalar’ to measure the depth value of the foreground object. Finally, the depth...
<?Pub Dtl?>For a three dimensional video (3DV) system, coding distortion of texture videos and depth maps could be propagated to virtual views during the view synthesis procedure. In this paper, the coding distortion is considered in the virtual view synthesis. In order to reduce the coding distortion as well as improve the qualities of synthesized virtual views, wiener filter is utilized in...
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...
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...
An efficient depth map generation method is presented for static scenes with moving objects. Firstly, static background scene is reconstructed. Depth map of the reconstructed static background scene is extracted by linear perspective. Then, moving objects are segmented precisely. Depth values are assigned to the segmented moving objects according to their positions in the static scene. Finally, the...
The current study presents an innovative magnetic bead-based 3-dimensional (3D) micro-incubator for rapid purification of tumor cells (TCs) by using micro-electro-mechanical-systems (MEMS) technologies. With the incorporation of magnetic beads, specific antibodies conjugated onto the surface of the magnetic beads can be used to specifically recognize the TCs in the clinical body fluids, followed by...
A novel watermarking method using singular value decomposition (SVD) is presented in this paper. In this algorithm, a 3D model is taken as a model that consists of triangular meshes, and we select some triangles called independent triangles set (ITS) to generate a Hankel matrix and apply SVD on it, then watermarks are embedded through modulating singular values. The watermarks that embedded by this...
An independent triangles set-based watermarking algorithm using singular value decomposition (SVD) is presented in this paper. In this algorithm, a 3D model is taken as a model that consists of triangular meshes, and we select the triangles called independent triangles set (ITS) to generate a Hankel matrix and apply SVD on it, then watermarks are embedded by modulating singular values. The watermarks...
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