By Topic

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

Date 6-9 Sept. 2004

Filter Results

Displaying Results 1 - 25 of 148
  • 3D modelling and visualization of the human lung

    Publication Year: 2004, Page(s):110 - 115
    Cited by:  Papers (3)  |  Patents (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1064 KB) | HTML iconHTML

    A method for modelling and visualizing human lungs using knowledge of lung anatomy and high resolution CT (HRCT) images is presented. The model consists of a symbolic description of lung anatomy and a 3D atlas. The 3D atlas is constructed using HRCT volume data. A few anatomical landmarks are determined and are used to divide the lungs into anatomically and diagnostically important regions. The la... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A unified approach for motion analysis and view synthesis

    Publication Year: 2004, Page(s):717 - 724
    Cited by:  Papers (3)
    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.
  • Analysis of Three-dimensional motion of an object using a fixed monocular camera

    Publication Year: 2004, Page(s):223 - 230
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (691 KB) | HTML iconHTML

    The research on analysis of three-dimensional motion by using a monocular camera instead of a stereo camera has important applications for making the microscopes used in microbiology or constructing the autonomous robots used in various fields of industry. We propose a fixed monocular camera whose focus changed cyclically to recognize three-dimensional absolute motion of a rigid object. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Panoramic image transform of omnidirectional images using discrete geometry techniques

    Publication Year: 2004, Page(s):608 - 615
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (571 KB) | HTML iconHTML

    This work proposes an omnidirectional-to-panoramic image transform with high accuracy using PDE-based resampling models. For the application of computer-vision techniques to omnidirectional images, the transformation of omnidirectional images to uniform-resolution quadric-surface images is needed in the two reasons. First, an omnidirectional image does not have a uniform resolution. Second, the de... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Multiple view reconstruction of people

    Publication Year: 2004, Page(s):357 - 364
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1012 KB) | HTML iconHTML

    This work presents a unified framework for model-based and model-free reconstruction of people from multiple camera views in a studio environment. Shape and appearance of the reconstructed model are optimised simultaneously based on multiple view silhouette, stereo and feature correspondence. A priori knowledge of surface structure is introduced as regularisation constraints. Model-based reconstru... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • View dependence of 3D recovery from folded pictures and warped 3D faces

    Publication Year: 2004, Page(s):35 - 41
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (916 KB) | HTML iconHTML

    In a popular visual illusion, the portrait on paper currency is folded into an M shape along vertical lines through the nose and the eyes. When this folded picture is tilted back and forth horizontally the face undergoes striking changes in expression. This distortion reveals two insights concerning 3D representation in the human visual system and we have explored these with experiments on simple ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Robust 3D segmentation for underwater acoustic images

    Publication Year: 2004, Page(s):813 - 819
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (375 KB) | HTML iconHTML

    A technique for 3D acoustic image segmentation and modelling is proposed. Especially, in the underwater environment, in which optical sensors suffer from visibility problems, the acoustical devices may provide efficient solutions, but, on the other hand, acoustic image interpretation is surely more difficult for a human operator. The proposed application involves the use of an acoustic camera whic... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Speech-driven face synthesis from 3D video

    Publication Year: 2004, Page(s):58 - 65
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (618 KB) | HTML iconHTML

    We present a framework for speech-driven synthesis of real faces from a corpus of 3D video of a person speaking. Video-rate capture of dynamic 3D face shape and colour appearance provides the basis for a visual speech synthesis model. A displacement map representation combines face shape and colour into a 3D video. This representation is used to efficiently register and integrate shape and colour ... 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.
  • Reconstruction of Euclidean planes from voxels

    Publication Year: 2004, Page(s):781 - 788
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2548 KB) | HTML iconHTML

    We aim to formulate the recognition of a planes from a discrete point set as a nonlinear optimization problem, and we prove a uniqueness theorem for the solution of this problem. We deal with the supercover model in a space for the expression of discrete planes. The algorithm achieves invertible data compression of digital objects, since the algorithm transforms a collection voxels to a collection... 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.
  • Face recognition from 3D data using Iterative Closest Point algorithm and Gaussian mixture models

    Publication Year: 2004, Page(s):502 - 509
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (401 KB) | HTML iconHTML

    An approach to face verification from 3D data is presented. The method uses 3D registration techniques designed to work with resolution levels typical of the irregular point cloud representations provided by structured light scanning. Preprocessing using a-priori information of the human face and the Iterative Closest Point algorithm are employed to establish correspondence between test and target... 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 (2)  |  Patents (3)
    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.
  • Novel diffractive optical elements and algorithms for real-time 3D and hyperspectral imaging

    Publication Year: 2004, Page(s): 944
    Request permission for commercial reuse | PDF file iconPDF (193 KB)
    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Surface illuminance flow

    Publication Year: 2004, Page(s):2 - 9
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (742 KB) | HTML iconHTML

    We introduce the concept of "surface illuminance flow" in two steps. First we reiterate the notion of the "light vector", and then proceed to decompose the light vector into a scalar "normal illuminance" and a vector "surface illuminance flow". The scalar normal illuminance generates the familiar illuminance pattern that is often known as the "shading". The vector surface illuminance flow is irrel... 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 (4)  |  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.
  • Realistic models of children heads from 3D-MRI segmentation and tetrahedral mesh construction

    Publication Year: 2004, Page(s):631 - 639
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (767 KB) | HTML iconHTML

    In order to analyze the sensitivity of children to RF fields and mobile phones in particular, the SAR (specific absorption ratio) defined as the power absorbed by a unit of mass of tissues (W/kg) should be computed based on a numerical model of the head. We propose to build realistic models from 3D-MRI of children heads. The method is composed of two steps. The first one consists in segmenting the... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Accurate 3D acquisition of freely moving objects

    Publication Year: 2004, Page(s):422 - 429
    Cited by:  Papers (5)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (777 KB) | HTML iconHTML

    This work presents a new acquisition method for 3D laser scanners that combines imaging, fast geometrical object tracking, and automatic pose estimation to register range profiles of freely moving objects. The method was developed to solve the constraint of rigidity between free-moving objects and a 3D scanner while preserving the accuracy of the range measurements. Rigidity constraint imposes tha... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Robust concealment for erroneous block bursts in stereoscopic images

    Publication Year: 2004, Page(s):820 - 827
    Cited by:  Papers (9)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (750 KB) | HTML iconHTML

    With the increasing number of image communication applications especially in the low complexity domain, error concealment has become a very important field of research. Since many compression standards for images and videos are block-based a lot of methods were applied to conceal block losses in monocular images. The fast progress of capture, representation and display technologies for 3D image da... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Pyramid coordinates for morphing and deformation

    Publication Year: 2004, Page(s):68 - 75
    Cited by:  Papers (15)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (795 KB) | HTML iconHTML

    Many model editing operations, such as morphing, blending, and shape deformation requires the ability to interactively transform the surface of a model in response to some control mechanism. For most computer graphics applications, it is important to preserve the local shape properties of input models during editing operations. We introduce the mesh editing technique that explicitly preserves loca... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Viewpoint consistent texture synthesis

    Publication Year: 2004, Page(s):388 - 395
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1016 KB) | HTML iconHTML

    The purpose of this work is to synthesize textures of rough, real world surfaces under freely chosen viewing and illumination directions. Moreover, such textures are produced for continuously changing directions in such a way that the different textures are mutually consistent, i.e. emulate the same piece of surface. This is necessary for 3D animation. It is assumed that the mesostructure (small-s... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fast interpolated cameras by combining a GPU based plane sweep with a max-flow regularisation algorithm

    Publication Year: 2004, Page(s):534 - 541
    Cited by:  Papers (8)  |  Patents (40)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (709 KB) | HTML iconHTML

    The work presents a method for the high speed calculation of crude depth maps. Performance and applicability are illustrated for view interpolation based on two input video streams, but the algorithm is perfectly amenable to multicamera environments. First a fast plane sweep algorithm generates the crude depth map. Speed results from hardware accelerated transformations and parallel processing ava... 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.
  • 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.