8 results match your criteria Acm Transactions On Graphics[Journal]

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Fast and Exact Continuous Collision Detection with Bernstein Sign Classification.

ACM Trans Graph 2014 Nov;33(6)

University of North Carolina at Chapel Hill.

We present fast algorithms to perform accurate CCD queries between triangulated models. Our formulation uses properties of the Bernstein basis and Bézier curves and reduces the problem to evaluating signs of polynomials. We present a geometrically exact CCD algorithm based on the exact geometric computation paradigm to perform reliable Boolean collision queries. Read More

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http://dx.doi.org/10.1145/2661229.2661237DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4283478PMC
November 2014

Perception of Perspective Distortions in Image-Based Rendering.

ACM Trans Graph 2013 Jul;32(4)

REVES/INRIA Sophia-Antipolis ; University of Giessen ; MPI Informatik.

Image-based rendering (IBR) creates realistic images by enriching simple geometries with photographs, e.g., mapping the photograph of a building façade onto a plane. Read More

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http://dx.doi.org/10.1145/2461912.2461971DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3833453PMC
July 2013
5 Reads

Optimizing Locomotion Controllers Using Biologically-Based Actuators and Objectives.

ACM Trans Graph 2012 Jul;31(4)

Stanford University.

We present a technique for automatically synthesizing walking and running controllers for physically-simulated 3D humanoid characters. The sagittal hip, knee, and ankle degrees-of-freedom are actuated using a set of eight Hill-type musculotendon models in each leg, with biologically-motivated control laws. The parameters of these control laws are set by an optimization procedure that satisfies a number of locomotion task terms while minimizing a biological model of metabolic energy expenditure. Read More

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http://dx.doi.org/10.1145/2185520.2185521DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4523558PMC
July 2012
4 Reads

Using Blur to Affect Perceived Distance and Size.

ACM Trans Graph 2010 Mar;29(2)

University of California, San Francisco and University of California, Berkeley, CA 94720.

We present a probabilistic model of how viewers may use defocus blur in conjunction with other pictorial cues to estimate the absolute distances to objects in a scene. Our model explains how the pattern of blur in an image together with relative depth cues indicates the apparent scale of the image's contents. From the model, we develop a semiautomated algorithm that applies blur to a sharply rendered image and thereby changes the apparent distance and scale of the scene's contents. Read More

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http://portal.acm.org/citation.cfm?doid=1731047.1731057
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http://dx.doi.org/10.1145/1731047.1731057DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3088122PMC
March 2010
3 Reads

Optimizing Cubature for Efficient Integration of Subspace Deformations.

ACM Trans Graph 2009 Dec;27(5):165

Cornell University.

We propose an efficient scheme for evaluating nonlinear subspace forces (and Jacobians) associated with subspace deformations. The core problem we address is efficient integration of the subspace force density over the 3D spatial domain. Similar to Gaussian quadrature schemes that efficiently integrate functions that lie in particular polynomial subspaces, we propose cubature schemes (multi-dimensional quadrature) optimized for efficient integration of force densities associated with particular subspace deformations, particular materials, and particular geometric domains. Read More

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http://dx.doi.org/10.1145/1409060.1409118DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2731311PMC
December 2009
1 Read

Discovering Structural Regularity in 3D Geometry.

ACM Trans Graph 2008 Aug;27(3)

ETH Zurich.

We introduce a computational framework for discovering regular or repeated geometric structures in 3D shapes. We describe and classify possible regular structures and present an effective algorithm for detecting such repeated geometric patterns in point- or mesh-based models. Our method assumes no prior knowledge of the geometry or spatial location of the individual elements that define the pattern. Read More

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http://dx.doi.org/10.1145/1399504.1360642DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3002787PMC
August 2008
2 Reads

Misperceptions in Stereoscopic Displays: A Vision Science Perspective.

ACM Trans Graph 2008 Jan;2008:23-32

University of California, Berkeley.

3d shape and scene layout are often misperceived when viewing stereoscopic displays. For example, viewing from the wrong distance alters an object's perceived size and shape. It is crucial to understand the causes of such misperceptions so one can determine the best approaches for minimizing them. Read More

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http://dx.doi.org/10.1145/1394281.1394285DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3966488PMC
January 2008
2 Reads

Meshless Animation of Fracturing Solids.

ACM Trans Graph 2005 Jul;24(3):957-964

Stanford University.

We present a new meshless animation framework for elastic and plastic materials that fracture. Central to our method is a highly dynamic surface and volume sampling method that supports arbitrary crack initiation, propagation, and termination, while avoiding many of the stability problems of traditional mesh-based techniques. We explicitly model advancing crack fronts and associated fracture surfaces embedded in the simulation volume. Read More

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http://dx.doi.org/10.1145/1186822.1073296DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3001686PMC
July 2005
6 Reads
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