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Visual Media Production, 2007. IETCVMP. 4th European Conference on

Date 27-28 Nov. 2007

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Displaying Results 1 - 25 of 43
  • About the speaker

    Publication Year: 2007, Page(s): 1
    IEEE is not the copyright holder of this material | PDF file iconPDF (57 KB)
    Freely Available from IEEE
  • High-resolution animation of facial dynamics

    Publication Year: 2007, Page(s):1 - 10
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (5919 KB)

    This paper presents a framework for performance-based animation and retargeting of high-resolution face models from motion capture. A novel method is introduced for learning a mapping between sparse 3D motion capture markers and dense high-resolution 3D scans of face shape and appearance. A high-resolution facial expression space is learnt from a set of 3D face scans as a person specific morphable... View full abstract»

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  • Safe hulls

    Publication Year: 2007, Page(s):1 - 8
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2334 KB)

    The visual hull is widely used as a proxy for novel view synthesis in computer vision. This paper introduces the safe hull, the first visual hull reconstruction technique to produce a surface containing only foreground parts. A theoretical basis underlies this novel approach which, unlike any previous work, can also identify phantom volumes attached to real objects. Using an image-based method, th... View full abstract»

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  • Multi-viewpoint silhouette extraction with 3D context-aware error detection, correction, and shadow suppression

    Publication Year: 2007, Page(s):1 - 9
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (430 KB)

    This paper presents a novel approach for silhouette extraction from multi-viewpoint images. The main contribution of this paper is a new algorithm for 1) 3D context-aware error detection and correction of 2D multi-viewpoint silhouette extraction and 2) 3D context-aware classification of cast-shadow regions. Some experiments demonstrate advantages against previous approaches. View full abstract»

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  • Temporal 3D shape matching

    Publication Year: 2007, Page(s):1 - 10
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2751 KB)

    This paper introduces a novel 4D shape descriptor to match temporal surface sequences. A quantitative evaluation based on the receiver-operator characteristic (ROC) curve is presented to compare the performance of conventional 3D shape descriptors with and without using a time filter. Feature- based 3D shape descriptors including shape distribution (Osada et al., 2002 ), spin image (Johnson et al.... View full abstract»

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  • Articulated 3-D modelling in a wide-baseline disparity space

    Publication Year: 2007, Page(s):1 - 10
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (885 KB)

    Image-based novel-view synthesis requires dense correspondences between the original views to produce a high quality synthetic view. In a wide-baseline stereo setup, dense correspondences are difficult to achieve due to the significant change in viewpoint giving rise to a number of problems. To improve their quality, the original, incomplete disparity maps are usually interpolated to fill in the m... View full abstract»

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  • Motion-based finger tracking for user interaction with mobile devices

    Publication Year: 2007, Page(s):1 - 6
    Cited by:  Papers (3)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (769 KB)

    A new motion-based tracking algorithm for user interaction with hand-held mobile devices is presented. The idea is to allow mobile phone users to control the device simply by moving a finger in front of a camera. A novel combination of Kalman filtering and the expectation maximization (EM) algorithm is utilized for estimation of two distinct motion components corresponding to the camera motion and... View full abstract»

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  • Deformable object tracking using optical flow constraints

    Publication Year: 2007, Page(s):1 - 8
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1251 KB)

    In this paper, we present a method for deformable object tracking that exploits the entire image information using the optical flow equation instead of working with discrete feature points. Our method starts from the optical flow constraint and first estimates global transformations in a hierarchical framework. Elastic deformations are then estimated separately using deformable meshes and spatial ... View full abstract»

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  • Motion segmentation using region growing and an attention based algorithm

    Publication Year: 2007, Page(s):1 - 8
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (788 KB)

    A novel two-stage framework for motion segmentation under stationary background conditions is proposed in this paper. The first stage uses an attention based method to extract motion information. The second stage then applies a region growing technique to motion vectors to obtain motion segmentation and completes motion segmentation with region matching. The algorithm is tested on various video da... View full abstract»

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  • Electronic slide matching and enhancement of a lecture video

    Publication Year: 2007, Page(s):1 - 7
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (694 KB)

    This paper presents an automatic method to enhance video presentations for distance learning applications. From a material recorded by a fixed, non professional camera, the system matches the slides displayed during the presentation with their electronic versions. The process to achieve slide recognition consists of two phases. In the first phase, the location where the slides are displayed is loc... View full abstract»

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  • Real-time foveal light fields for spatial imaging devices

    Publication Year: 2007, Page(s):1 - 8
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1495 KB)

    Recent advances in display technology are introducing new devices that provide multiple viewers with a true 3D experience. These spatial imaging devices display either volumetric models or four dimensional image-based light-field models. The light field or plenoptic function gives radiance along the lines passing through a scene. Due to its higher dimensionality it is expensive to model, capture, ... View full abstract»

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  • Dynamic feathering: Minimising blending artefacts in view-dependent rendering

    Publication Year: 2007, Page(s):1 - 10
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1051 KB)

    Conventional view-dependent texture mapping techniques produce composite images by blending subsets of input images, weighted according to their relative influence at the rendering viewpoint, over regions where the views overlap. Geometric or camera calibration errors often result in a los s of detail due to blurring or double exposure artefacts which tends to be exacerbated by the number of blend... View full abstract»

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  • Combining motion segmentation and feature based tracking for object classification and anomaly detection

    Publication Year: 2007, Page(s): 1
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (428 KB)

    We present a novel pipeline for automated visual surveillance system based on utilising conventional adaptive background modelling in-conjunction with optic flow to provide motion sensitive foreground/background segmentation. Furthermore active contours are then used to detect robust motion boundaries within the scene from which PCA is used for object classification. Feature based tracking is then... View full abstract»

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  • Construction and perceptual evaluation of a 3D head model

    Publication Year: 2007, Page(s): 1
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (593 KB)

    This paper presents a method to construct a compact 3D head model capable of synthesizing realistic face expressions with subtle details such as wrinkles and muscle folds. The models parameters are based on the facial action coding system (FACS), and its output verified by expert psychologists. Such a compact and accurate model offers a large market potential not only in computer graphics industri... View full abstract»

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  • Real time facial features detection using boosted classifiers and geometrical models

    Publication Year: 2007, Page(s): 1
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (206 KB)

    In this short communication, we present a four steps algorithms for fast eyes and mouth detection and tracking in videos. Attentionnal cascades of boosted classifiers respectively trained on faces, eyes and mouths are used as a detection step. Facial features are also detected using a Chinese transformation which results in a finer localization than the holistic approach of boosted classifiers alo... View full abstract»

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  • Real-time video analysis for vehicle lights detection using temporal information

    Publication Year: 2007, Page(s): 1
    Cited by:  Papers (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (202 KB)

    We have proposed a real-time system for vehicle lights detection. This goal has been achieved by combining together a rule-based approach and a temporal tracking system. View full abstract»

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  • Automatic audio driven animation of non-verbal actions

    Publication Year: 2007, Page(s): 1
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (169 KB)

    While speech driven animation for lip-synching and facial expression synthesis from speech has previously received much attention, there is no previous work on generating non-verbal actions such as laughing and crying automatically from an audio signal. In this article initial results on a system designed to address this issue are presented. 3D facial data is recorded for a participant making diff... View full abstract»

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  • Reverse storyboarding for video retrieval

    Publication Year: 2007, Page(s): 1
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (490 KB)

    We report early experiments towards a content based retrieval (CBVR) system that harnesses storyboards as an efficient and intuitive input mechanism for querying video databases. Storyboards encapsulate high level semantics describing both objects in the scene (spatially) and their movement (dynamics). Dynamics are depicted using a rich vocabulary of motion cues borrowed from animation; streak and... View full abstract»

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  • Stochastic generation of realistic image content

    Publication Year: 2007, Page(s): 1
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (269 KB)

    Our goal is to generate novel photo-realistic images of a given object class (e.g. faces, trees) using a model trained from example images. To achieve this, we treat training images as samples from a texture with spatially varying statistics and synthesize using a modification of the patch-based method of Efros and Freeman. Unfortunately this generates images that are locally consistent, but globa... View full abstract»

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  • HDR Photoreal Paint Shaders For Automobiles and Planes utilizing Thin Film optics

    Publication Year: 2007, Page(s): 1
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (688 KB)

    This paper presents the development of HDR photoreal shaders for automobiles and planes utilizing thin film optics techniques. The shaders allows the artist to create metallic, pearlescent, candy paints, and colored chromes. View full abstract»

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  • About the speaker

    Publication Year: 2007, Page(s): 1
    IEEE is not the copyright holder of this material | PDF file iconPDF (56 KB)
    Freely Available from IEEE
  • About the speaker

    Publication Year: 2007, Page(s):1 - 2
    IEEE is not the copyright holder of this material | PDF file iconPDF (41 KB)
    Freely Available from IEEE
  • Self shadows and cast shadows in estimating illumination distribution

    Publication Year: 2007, Page(s):1 - 10
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1471 KB)

    This paper compares two methods for estimating illumination distributions from shadows: methods using self shadows and cast shadows. The cast shadow method provides an effective framework for recovering illuminations in a real scene utilizing variations of image brightnesses inside shadows cast by an occluding object of known shape. The shadow surface is typically the same plane on which the objec... View full abstract»

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  • Recovering refined surface normals for relighting clothing in dynamic scenes

    Publication Year: 2007, Page(s):1 - 8
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2123 KB)

    In this paper we present a method to relight captured 3D video sequences of non-rigid, dynamic scenes, such as clothing of real actors, reconstructed from multiple view video. A view-dependent approach is introduced to refine an initial coarse surface reconstruction using shape-from-shading to estimate detailed surface normals. The prior surface approximation is used to constrain the simultaneous ... View full abstract»

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  • Gamut ID

    Publication Year: 2007, Page(s):1 - 10
    Cited by:  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (530 KB)

    New technologies in capturing and displaying wide gamut images and new standards for wide gamut colour encoding enable a new market of wide-gamut content creation (video, images, games, electronic documents). One obstacle for adopting wide gamut content in motion picture creation is the compatibility of wide gamut content to the employed displays. The term display includes here any video colour re... View full abstract»

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