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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...
Integral imaging, also known as holoscopic imaging, appears to be a promising approach for glassless 3D. This paper presents the general concepts of integral imaging and lenticular lenses, which are used in the image acquisition and displaying step. Special attention is devoted to the analysis of 3D holoscopic video compression considering its intrinsic nature of having a high cross-correlation between...
With the development of 3D display and interactive multimedia systems, new 3D video applications, such as 3DTV and Free Viewpoint Video, are attracting significant interests. In order to enable these new applications, new data formats including captured 2D video sequences and corresponding depth maps have been proposed. Compared to conventional video frames, depth maps have very different characteristics...
Currently, depth sequences generated by automatic depth estimation suffer from the temporal inconsistency problem. Estimated depth values of some objects vary in adjacent frames, whereas the objects actually remain on the same depth planes. These temporal depth errors significantly impair the visual quality of the synthesized virtual view as well as the coding efficiency of the depth sequences. Since...
During view synthesis based on depth maps, also known as Depth-Image-Based Rendering (DIBR), annoying artifacts are often generated around foreground objects, yielding the visual effects that slim silhouettes of foreground objects are scattered into the background. The artifacts are referred as the boundary noises. We investigate the cause of boundary noises, and find out that they result from the...
In this paper we propose a novel approach to error concealment that can be applied to MVC and other 3D video coding technologies. The image content, that is lost due to errors, is recovered with use of multiple error-concealment techniques. In our work we have used three techniques: well-known temporal- and intra-based techniques and a novel inter-view technique. Proposed inter-view recovery employs...
In this paper, we propose an efficient depth video coding method for the 3D video (3DV) system. Since the boundary information of depth video significantly affects the rendering quality in the 3DV system, the proposed method reduces the loss of the boundary information by producing precise intra prediction modes. The characteristics of depth video are analyzed and considered to modify the previous...
Compression of Depth maps that are used in 3D video systems based on Depth Image Based Rendering (DIBR) poses a new challenge in video coding, since it is not a sequence of images for final viewing by end users rather an aid for rendering. Therefore, compressing depth maps using existing video coding techniques yields unacceptable distortions while rendering virtual views. In this paper we propose...
An effective representation of 3D video in future 3D-TV systems consists of monoscopic video (colour component) and associated per-pixel depth information (depth component). As depth component indicates relative distance between objects within the scene and a camera, pixel values change not only when objects move in vertical and horizontal directions but also when they move in a depth direction. Instead...
This paper presents a content prioritization technique for perceptually enhanced communication of 3D video data over wireless local area network. The prioritisation is performed on the basis of a novel segmentation technique, which utilizes the depth information of 3D content for separating individual objects of the sequence. These objects are then encoded and transmitted separately under different...
Depth image-based rendering (DIBR) is generally used to synthesize virtual view images in free viewpoint television (FTV) and three-dimensional (3-D) video. One of the main problems in DIBR is how to fill the holes caused by disocclusion regions and inaccurate depth values. In this paper, we propose a new hole filling method using a depth based in-painting technique. Experimental results show that...
The context of this study is 3D video. Starting from a sequence of multi-view video plus depth (MVD) data, the proposed quad-based representation takes into account, in a unified manner, different issues such as compactness, compression, and intermediate view synthesis. The representation is obtained into two steps. Firstly, a set of 3D quads is extracted by using a quadtree decomposition of the depth...
Technological advances have made possible a number of new applications in the area of 3D video. One of the enabling technologies for many of these 3D applications is multiview video coding, which has received significant attention in the last several years. However, the fundamental need of multiview coding for applications like immersive tele-conferencing has not been addressed. In this paper we define...
Multiview video coding (MVC) is getting more and more attention in recent years because of the realistic perception it can bring. However, the current H.264-based coding scheme cannot get enough coding gain in the rate-distortion (R-D) performance. Furthermore, the view synthesis and random access between views are also design challenges. In this paper, a multiview hybrid coding system with texture-depth...
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