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Video matting of complex scenes

by Yung-yu Chuang, Aseem Agarwala, Brian Curless, David H. Salesin, Richard Szeliski - ACM Trans.Graph , 2002
"... This paper describes a new framework for video matting, the process of pulling a high-quality alpha matte and foreground from a video sequence. The framework builds upon techniques in natural image matting, optical flow computation, and background estimation. User interaction is comprised of garbage ..."
Abstract - Cited by 145 (10 self) - Add to MetaCart
based on information about where flow is likely to be accurate. A Bayesian matting technique uses the flowed trimaps to yield high-quality mattes of moving foreground elements with complex boundaries filmed by a moving camera. A novel technique for smoke matte extraction is also demonstrated. CR

Grasp Planning in Complex Scenes

by Dmitry Berenson, Rosen Diankov, Koichi Nishiwaki, Satoshi Kagami, James Kuffner
"... Abstract — This paper combines grasp analysis and manipulation planning techniques to perform fast grasp planning in complex scenes. In much previous work on grasping, the object being grasped is assumed to be the only object in the environment. Hence the grasp quality metrics and grasping strategie ..."
Abstract - Cited by 56 (10 self) - Add to MetaCart
Abstract — This paper combines grasp analysis and manipulation planning techniques to perform fast grasp planning in complex scenes. In much previous work on grasping, the object being grasped is assumed to be the only object in the environment. Hence the grasp quality metrics and grasping

Rendering Complex Scenes with Memory-Coherent Ray Tracing

by Matt Pharr, Craig Kolb, Reid Gershbein, Pat Hanrahan - In Proceedings of SIGGRAPH , 1997
"... Simulating realistic lighting and rendering complex scenes are usually considered separate problems with incompatible solutions. Accurate lighting calculations are typically performed using ray tracing algorithms, which require that the entire scene database reside in memory to perform well. Convers ..."
Abstract - Cited by 117 (1 self) - Add to MetaCart
Simulating realistic lighting and rendering complex scenes are usually considered separate problems with incompatible solutions. Accurate lighting calculations are typically performed using ray tracing algorithms, which require that the entire scene database reside in memory to perform well

Waterfall Segmentation of Complex Scenes

by Allan Hanbury, Beatriz Marcotegui - Lecture Notes in Computer Science 3851 , 2006
"... Abstract. We present an image segmentation technique using the mor-phological Waterfall algorithm. Improvements in the segmentation are brought about by using improved gradients. These are based on the detection of object boundaries learnt from human segmentations intro-duced by Martin et al. (2004) ..."
Abstract - Cited by 6 (2 self) - Add to MetaCart
Abstract. We present an image segmentation technique using the mor-phological Waterfall algorithm. Improvements in the segmentation are brought about by using improved gradients. These are based on the detection of object boundaries learnt from human segmentations intro-duced by Martin et al. (2004). We avoid the usual pitfall found when applying Watershed algorithms to these boundaries, namely that the boundary lines usually contain gaps, by making use of distance func-tions on the boundary image. Two types of distance function are used: the classic distance function and a distance function for numerical images recently introduced by Beucher (2005). Resulting segmentations are com-pared to human segmentations using the Berkeley segmentation bench-mark. The benchmark results show that the proposed segmentation al-gorithm produces segmentations comparable to those produced by the Normalised Cuts algorithm. 1

Video inpainting of complex scenes

by Alasdair Newson, Matthieu Fradet, Yann Gousseau, Alasdair Newson, Matthieu Fradet, Yann Gousseau, Alasdair Newson, Matthieu Fradet, Yann Gousseau , 2014
"... HAL is a multi-disciplinary open access archive for the deposit and dissemination of sci-entific research documents, whether they are pub-lished or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte p ..."
Abstract - Cited by 3 (0 self) - Add to MetaCart
HAL is a multi-disciplinary open access archive for the deposit and dissemination of sci-entific research documents, whether they are pub-lished or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et a ̀ la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

Complex Scenes and Glossy Reflections

by Marc Stamminger Mpi Informatik Saarbrücken, Daniel Wexler, Marc Stamminger , 2009
"... A lot of research towards global illumination has been focussed on the radiosity method. Nevertheless, it is still a rather academic topic which finds very slowly its way into commercial products. The scope of this tutorial is to describe recent developments in radiosity research that might narrow t ..."
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A lot of research towards global illumination has been focussed on the radiosity method. Nevertheless, it is still a rather academic topic which finds very slowly its way into commercial products. The scope of this tutorial is to describe recent developments in radiosity research that might narrow the gap with commercial applications. The first part of the tutorial course will be given by a pioneer in commercial computer graphics, who will set the stage for the demands of commercial rendering products and assess why radiosity has not been used until now.

search in complex scenes

by Alex D. Hwang, Emily C. Higgins, Marc Pomplun
"... model of top-down attentional control during visual ..."
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model of top-down attentional control during visual

A bayesian hierarchical model for learning natural scene categories

by Li Fei-fei - In CVPR , 2005
"... We propose a novel approach to learn and recognize natural scene categories. Unlike previous work [9, 17], it does not require experts to annotate the training set. We represent the image of a scene by a collection of local regions, denoted as codewords obtained by unsupervised learning. Each region ..."
Abstract - Cited by 948 (15 self) - Add to MetaCart
set of 13 categories of complex scenes. 1.

A Model of Saliency-based Visual Attention for Rapid Scene Analysis

by Laurent Itti, Christof Koch, Ernst Niebur , 1998
"... A visual attention system, inspired by the behavior and the neuronal architecture of the early primate visual system, is presented. Multiscale image features are combined into a single topographical saliency map. A dynamical neural network then selects attended locations in order of decreasing salie ..."
Abstract - Cited by 1748 (72 self) - Add to MetaCart
saliency. The system breaks down the complex problem of scene understanding by rapidly selecting, in a computationally efficient manner, conspicuous locations to be analyzed in detail. Index terms: Visual attention, scene analysis, feature extraction, target detection, visual search. \Pi I. Introduction

Abstract Ray Tracing Complex Scenes

by Timothy L. Kay, James T. Kajiya
"... A new algorithm for speeding up ray-object intersection calculations is presented. Objects are bounded by a new type of extent, which can be made to fit convex hulls arbitrarily tightly. The objects are placed into a hierarchy. A new hierarchy traversal algorithm is presented which is efficient in t ..."
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in the sense that objects along the ray are queried in an e~cient order. Results are presented which demonstrate that our technique is several times faster than other published algorithms. Fu.rthermore, we demon-strate that it is currently possible to ray trace scenes containing hundreds of thousands of ob-jects.
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