By Topic

Proceedings. 2nd International Symposium on 3D Data Processing, Visualization and Transmission, 2004. 3DPVT 2004.

6-9 Sept. 2004

Filter Results

Displaying Results 1 - 25 of 148
  • A unified approach for motion analysis and view synthesis

    Publication Year: 2004, Page(s):717 - 724
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (764 KB) | HTML iconHTML

    Image based rendering (IBR) consists of several steps: (i) calibration (or ego-motion computation) of all input images, (ii) determination of regions in the input images used to synthesize the new view. (iii) interpolating the new view from the selected areas of the input images. We propose a unified representation for all these aspects of IBR using the space-time (x-y-t) volume. The presented app... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Specularity elimination in range sensing for accurate 3D modeling of specular objects

    Publication Year: 2004, Page(s):707 - 714
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (755 KB) | HTML iconHTML

    We present a novel range sensing method that is capable of constructing accurate 3D models of specular objects. Our method utilizes a new range imaging concept called multipeak range imaging, which accounts for the effects of mutual reflections. False measurements generated by mutual reflections are then eliminated by applying a series of constraint tests based on local smoothness, global coordina... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A formulation of boundary mesh segmentation

    Publication Year: 2004, Page(s):82 - 89
    Cited by:  Papers (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB) | HTML iconHTML

    We present a formulation of boundary mesh segmentation as an optimization problem. Previous segmentation solutions are classified according to the different segmentation goals, the optimization criteria and the various algorithmic techniques used. We identify two primarily distinct types of mesh segmentation, namely parts segmentation and patch segmentation. We also define generic algorithms for t... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Adaptive online transmission of 3D TexMesh using scale-space analysis

    Publication Year: 2004, Page(s):688 - 695
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (445 KB) | HTML iconHTML

    Efficient online visualization of 3D mesh and photo realistic texture is essential for a variety of applications, such as museum exhibits and medical images. In these applications synthetic texture and a predefined set of views is not an option. We propose using a mesh simplification algorithm based on scale-space analysis of the feature point distribution, combined with an associated analysis of ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Estimating the surface radiance function from single images

    Publication Year: 2004, Page(s):494 - 501
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (598 KB) | HTML iconHTML

    This work describes a simple method for estimating the surface radiance function from single images of smooth surfaces made of materials whose reflectance function is isotropic and monotonic. The method makes use of an implicit mapping of the Gauss map between the surface and a unit sphere. By assuming the material brightness is monotonic with respect to the angle between the illuminant direction ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Data-driven approaches to digital human modeling

    Publication Year: 2004, Page(s):380 - 387
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1321 KB) | HTML iconHTML

    Data-driven approach is an appealing way to depict people in a virtual world. The captured shape and movement data from real people are structured and combined to reproduce or create new samples in an intuitive and controllable way. We focus on the body shape modeling and elucidate the issues related to data-driven methods. The difficulty of adopting data-driven approach for human body shape model... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Surface height recovery using heat flow and manifold embedding

    Publication Year: 2004, Page(s):860 - 867
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (691 KB) | HTML iconHTML

    We make two contributions to the problem of shape-from-shading. First, we develop a new method for surface normal recovery. We pose the problem as that of solving the steady state heat equation subject to the hard constraint that Lambert's law is satisfied. According to this picture, the surface normals are found by taking the gradient of a scalar field. The heat equation for the scalar field can ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Surface normals and height from non-Lambertian image data

    Publication Year: 2004, Page(s):18 - 25
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1040 KB) | HTML iconHTML

    It is well known that many surfaces exhibit reflectance that is not well modelled by Lambert's law. This is the case not only for surfaces that are rough or shiny, but also those that are matte and composed of materials that are particle suspensions. As a result, standard Lambertian shape-from-shading methods cannot be applied directly to the analysis of rough and shiny surfaces. In order to overc... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • GPU-assisted z-field simplification

    Publication Year: 2004, Page(s):673 - 679
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB) | HTML iconHTML

    Height fields and depth maps which we collectively refer to as z-fields, usually carry a lot of redundant information and are often used in real-time applications. This is the reason why efficient methods for their simplification are necessary. On the other hand, the computation power and programmability of commodity graphics hardware has significantly grown. We present an adaptation of an existin... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Detection and compensation of image sequence jitter due to an unstable CCD camera for video tracking of a moving target

    Publication Year: 2004, Page(s):258 - 261
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB) | HTML iconHTML

    Nowadays image motion analysis is considered as a significant subject in image processing and according to its characteristics is divided into different categories. This paper focuses on camera jitter as fast translations in image sequence due to an unstable platform. Our studies have led to do correlation matching [C-S. Fuh et al. (1991)] between well featured templates [M.A.Z. Pisheh et al. (200... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Estimating curvatures and their derivatives on triangle meshes

    Publication Year: 2004, Page(s):486 - 493
    Cited by:  Papers (79)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1542 KB) | HTML iconHTML

    The computation of curvature and other differential properties of surfaces is essential for many techniques in analysis and rendering. We present a finite-differences approach for estimating curvatures on irregular triangle meshes that may be thought of as an extension of a common method for estimating per-vertex normals. The technique is efficient in space and time, and results in significantly f... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fusing multiple color images for texturing models

    Publication Year: 2004, Page(s):558 - 565
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (830 KB) | HTML iconHTML

    A commonly encountered problem when creating 3D models of large real scenes is unnatural color texture fusion. Due to variations in lighting and camera settings (both manual and automatic), captured color texture maps of the same structure can have very different colors. When fusing multiple views to create larger models, this color variation leads to a poor appearance with odd color tilings on ho... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Filling the signed distance field by fitting local quadrics

    Publication Year: 2004, Page(s):1003 - 1010
    Cited by:  Papers (7)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1132 KB) | HTML iconHTML

    We propose a method of filling unmeasured regions of shape models integrated from multiple measurements of surface shapes. We use the signed distance field (SDF) as shape representation that contains information of the surface normal along with the signed distance at the closest point on the surface from the sampling point. We solve this problem by iteratively fitting quadratic function to generat... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Real time visualization of 3D variable in time object based on cloud of points data gathered by coloured structure light projection system

    Publication Year: 2004, Page(s):623 - 630
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5243 KB) | HTML iconHTML

    The problem of virtual view creation has received increasing attention in recent years. Major current approaches are based on modified stereo vision systems. Recently the structure light measurement system based on digital light projection supported by special data coding and processing allow to rapid 3D shape acquisition. Application of this technology to record 3D data has increased significantl... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Spacetime-coherent geometry reconstruction from multiple video streams

    Publication Year: 2004, Page(s):365 - 372
    Cited by:  Papers (5)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (438 KB) | HTML iconHTML

    By reconstructing time-varying geometry one frame at a time, one ignores the continuity of natural motion, wasting useful information about the underlying video-image formation process and taking into account temporally discontinuous reconstruction results. In 4D spacetime, the surface of a dynamic object describes a continuous 3D hyper-surface. This hyper-surface can be implicitly defined as the ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 3D performance capture for facial animation

    Publication Year: 2004, Page(s):42 - 49
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (956 KB) | HTML iconHTML

    This work describes how a photogrammetry based 3D capture system can be used as an input device for animation. The 3D Dynamic Capture System is used to capture the motion of a human face, which is extracted from a sequence of 3D models captured at TV frame rate. Initially the positions of a set of landmarks on the face are extracted. These landmarks are then used to provide motion data in two diff... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Scalable and efficient coding of 3D model extracted from a video

    Publication Year: 2004, Page(s):836 - 843
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (789 KB) | HTML iconHTML

    This work presents an efficient and scalable coding scheme for transmitting a stream of 3D models extracted from a video. As in classical model-based video coding, the geometry, connectivity, and texture of the 3D models have to be transmitted, as well as the camera position for each frame in the original video. The proposed method is based on exploiting the interrelations existing between each ty... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Helmholtz Stereopsis on rough and strongly textured surfaces

    Publication Year: 2004, Page(s):10 - 17
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1309 KB) | HTML iconHTML

    Helmholtz Stereopsis (HS) has recently been explored as a promising technique for capturing shape of objects with unknown reflectance. So far, it has been widely applied to objects of smooth geometry and piecewise uniform Bidirectional Reflectance Distribution Function (BRDF). Moreover, for nonconvex surfaces the inter-reflect ion effects have been completely neglected. We extend the method to sur... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Segmenting correlation stereo range images using surface elements

    Publication Year: 2004, Page(s):656 - 663
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (900 KB) | HTML iconHTML

    This work describes methods for segmenting planar surfaces from noisy 3D data obtained from correlation stereo vision. We make use of local planar surface elements called patchlets. Patchlets have 3D position, orientation and size parameters. As well, they have positional confidence measures based on the stereo sensor model. Patchlet orientations (i.e., surface normals) provide important additiona... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A robust correlation measure for correspondence estimation

    Publication Year: 2004, Page(s):155 - 162
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (553 KB) | HTML iconHTML

    A median correlation for the estimation of corresponding points in stereovision is proposed. It is based on the normalised correlation coefficient using the median instead of the mean. Its performance appears to be superior than conventional correlation specially in depth discontinuities image areas. This conclusion is derived from an empirical evaluation in which the proposed correlation is compa... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Construction of animal models and motion synthesis in 3D virtual environments using image sequences

    Publication Year: 2004, Page(s):250 - 257
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1451 KB) | HTML iconHTML

    We describe a system that can build 3D animal models and synthesize animations in 3D virtual environments. The model is constructed by 2D images captured by specific views. The animation is synthesised by using physical motion models of the animal and tracking data from image sequences. Finally, the user selects some points of the 3D world and a smooth and safe motion path, which passes by these p... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Enhanced vector quantization for data reduction and filtering

    Publication Year: 2004, Page(s):470 - 477
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (453 KB) | HTML iconHTML

    Modern automatic digitizers can sample huge amounts of 3D data points on the object surface in a short time. Point based graphics is becoming a popular framework to reduce the cardinality of these data sets and to filter measurement noise, without having to store in memory and process mesh connectivity. Main contribution of this paper is the introduction of soft clustering techniques in the field ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Disordered patterns projection for 3D motion recovering

    Publication Year: 2004, Page(s):262 - 269
    Cited by:  Papers (5)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (750 KB) | HTML iconHTML

    We present a new color structured light technique based on a disordered codeword strategy. The aim of this method is to recover 3D information in moving scenes in such a way that the correspondence problem is easily and robustly solved. With this goal in mind a six-connectivity topology has been introduced in our pattern and color features have been inserted on it. Repetition and disorder are allo... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Feature based registration of range images for mapping of natural outdoor environments

    Publication Year: 2004, Page(s):542 - 549
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (911 KB) | HTML iconHTML

    Challenges related to viewpoint registration in rough forest terrain can be quite different compared to those faced in structured environments. Maneuvring the sensor between measurement positions introduces large error into the a priori estimates of the registration coordinates. As a consequence, locally optimal registration methods may not work properly. Moreover, due to the clutter, the scene co... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Automatic extraction of planar projections from panoramic range images

    Publication Year: 2004, Page(s):231 - 234
    Cited by:  Papers (3)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1079 KB) | HTML iconHTML

    This work presents a segmentation technique to decompose automatically a panoramic range image into a set of planar projections. It consists of three stages. Firstly, two orthogonal surface orientation histograms are generated. Secondly, from these histograms the major surfaces orientations are extracted. Finally, a histogram of distances is computed for each one of these orientations; it would be... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.