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ACM Transactions on Graphics (TOG), Volume 31 Issue 1, January 2012

Learning hatching for pen-and-ink illustration of surfaces
Evangelos Kalogerakis, Derek Nowrouzezahrai, Simon Breslav, Aaron Hertzmann
Article No.: 1
DOI: 10.1145/2077341.2077342

This article presents an algorithm for learning hatching styles from line drawings. An artist draws a single hatching illustration of a 3D object. Her strokes are analyzed to extract the following per-pixel properties: hatching level (hatching,...

Temporally coherent completion of dynamic shapes
Hao Li, Linjie Luo, Daniel Vlasic, Pieter Peers, Jovan Popović, Mark Pauly, Szymon Rusinkiewicz
Article No.: 2
DOI: 10.1145/2077341.2077343

We present a novel shape completion technique for creating temporally coherent watertight surfaces from real-time captured dynamic performances. Because of occlusions and low surface albedo, scanned mesh sequences typically exhibit large holes...

Physically-based simulation of rainbows
Iman Sadeghi, Adolfo Munoz, Philip Laven, Wojciech Jarosz, Francisco Seron, Diego Gutierrez, Henrik Wann Jensen
Article No.: 3
DOI: 10.1145/2077341.2077344

In this article, we derive a physically-based model for simulating rainbows. Previous techniques for simulating rainbows have used either geometric optics (ray tracing) or Lorenz-Mie theory. Lorenz-Mie theory is by far the most accurate technique...

Exposing photo manipulation with inconsistent reflections
James F. O'Brien, Hany Farid
Article No.: 4
DOI: 10.1145/2077341.2077345

The advent of sophisticated photo editing software has made it increasingly easier to manipulate digital images. Often visual inspection cannot definitively distinguish the resulting forgeries from authentic photographs. In response, forensic...

PolyDepth: Real-time penetration depth computation using iterative contact-space projection
Changsoo Je, Min Tang, Youngeun Lee, Minkyoung Lee, Young J. Kim
Article No.: 5
DOI: 10.1145/2077341.2077346

We present a real-time algorithm that finds the Penetration Depth (PD) between general polygonal models based on iterative and local optimization techniques. Given an in-collision configuration of an object in configuration space, we find an...

Feature-adaptive GPU rendering of Catmull-Clark subdivision surfaces
Matthias Nießner, Charles Loop, Mark Meyer, Tony Derose
Article No.: 6
DOI: 10.1145/2077341.2077347

We present a novel method for high-performance GPU-based rendering of Catmull-Clark subdivision surfaces. Unlike previous methods, our algorithm computes the true limit surface up to machine precision, and is capable of rendering surfaces that...

Interactive sound propagation using compact acoustic transfer operators
Lakulish Antani, Anish Chandak, Lauri Savioja, Dinesh Manocha
Article No.: 7
DOI: 10.1145/2077341.2077348

We present an interactive sound propagation algorithm that can compute high orders of specular and diffuse reflections as well as edge diffractions in response to moving sound sources and a moving listener. Our formulation is based on a...

Three-dimensional proxies for hand-drawn characters
Eakta Jain, Yaser Sheikh, Moshe Mahler, Jessica Hodgins
Article No.: 8
DOI: 10.1145/2077341.2077349

Drawing shapes by hand and manipulating computer-generated objects are the two dominant forms of animation. Though each medium has its own advantages, the techniques developed for one medium are not easily leveraged in the other medium because...

BRDF models for accurate and efficient rendering of glossy surfaces
Joakim Löw, Joel Kronander, Anders Ynnerman, Jonas Unger
Article No.: 9
DOI: 10.1145/2077341.2077350

This article presents two new parametric models of the Bidirectional Reflectance Distribution Function (BRDF), one inspired by the Rayleigh-Rice theory for light scattering from optically smooth surfaces, and one inspired by micro-facet...

Fluid simulation using Laplacian eigenfunctions
Tyler De Witt, Christian Lessig, Eugene Fiume
Article No.: 10
DOI: 10.1145/2077341.2077351

We present an algorithm for the simulation of incompressible fluid phenomena that is computationally efficient and leads to visually convincing simulations with far fewer degrees of freedom than existing approaches. Rather than using an Eulerian...

Specular reflection from woven cloth
Piti Irawan, Steve Marschner
Article No.: 11
DOI: 10.1145/2077341.2077352

The appearance of a particular fabric is produced by variations in both large-scale reflectance and small-scale texture as the viewing and illumination angles change across the surface. This article presents a study of the reflectance and texture...