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ACM Transactions on Graphics (TOG), Volume 34 Issue 2, February 2015

Anisotropic Delaunay Meshes of Surfaces
Jean-Daniel Boissonnat, Kan-Le Shi, Jane Tournois, Mariette Yvinec
Article No.: 14
DOI: 10.1145/2721895

Anisotropic simplicial meshes are triangulations with elements elongated along prescribed directions. Anisotropic meshes have been shown well suited for interpolation of functions or solving PDEs. They can also significantly enhance the accuracy...

Linear Volumetric Focus for Light Field Cameras
Donald G. Dansereau, Oscar Pizarro, Stefan B. Williams
Article No.: 15
DOI: 10.1145/2665074

We demonstrate that the redundant information in light field imagery allows volumetric focus, an improvement of signal quality that maintains focus over a controllable range of depths. To do this, we derive the frequency-domain region of support...

A Light Transport Framework for Lenslet Light Field Cameras
Chia-Kai Liang, Ravi Ramamoorthi
Article No.: 16
DOI: 10.1145/2665075

Light field cameras capture full spatio-angular information of the light field, and enable many novel photographic and scientific applications. It is often stated that there is a fundamental trade-off between spatial and angular resolution, but...

Hybrid Skeletal-Surface Motion Graphs for Character Animation from 4D Performance Capture
Peng Huang, Margara Tejera, John Collomosse, Adrian Hilton
Article No.: 17
DOI: 10.1145/2699643

We present a novel hybrid representation for character animation from 4D Performance Capture (4DPC) data which combines skeletal control with surface motion graphs. 4DPC data are temporally aligned 3D mesh sequence reconstructions of the dynamic...

Interactive Material Design Using Model Reduction
Hongyi Xu, Yijing Li, Yong Chen, Jernej Barbič
Article No.: 18
DOI: 10.1145/2699648

We demonstrate an interactive method to create heterogeneous continuous deformable materials on complex three-dimensional meshes. The user specifies displacements and internal elastic forces at a chosen set of mesh vertices. Our system then...

Augmented Airbrush for Computer Aided Painting (CAP)
Roy Shilkrot, Pattie Maes, Joseph A. Paradiso, Amit Zoran
Article No.: 19
DOI: 10.1145/2699649

We present an augmented airbrush that allows novices to experience the art of spray painting. Inspired by the thriving field of smart tools, our handheld device uses 6DOF tracking, augmentation of the airbrush trigger, and a specialized algorithm...

Data-Driven Color Manifolds
Chuong H. Nguyen, Tobias Ritschel, Hans-Peter Seidel
Article No.: 20
DOI: 10.1145/2699645

Color selection is required in many computer graphics applications, but can be tedious, as 1D or 2D user interfaces are employed to navigate in a 3D color space. Until now the problem was considered a question of designing general color spaces...

Gaze-Driven Video Re-Editing
Eakta Jain, Yaser Sheikh, Ariel Shamir, Jessica Hodgins
Article No.: 21
DOI: 10.1145/2699644

Given the current profusion of devices for viewing media, video content created at one aspect ratio is often viewed on displays with different aspect ratios. Many previous solutions address this problem by retargeting or resizing the video, but a...

Synthesis of Complex Image Appearance from Limited Exemplars
Olga Diamanti, Connelly Barnes, Sylvain Paris, Eli Shechtman, Olga Sorkine-Hornung
Article No.: 22
DOI: 10.1145/2699641

Editing materials in photos opens up numerous opportunities like turning an unappealing dirt ground into luscious grass and creating a comfortable wool sweater in place of a cheap t-shirt. However, such edits are challenging. Approaches such as 3D...

Layered Light Field Reconstruction for Defocus Blur
Karthik Vaidyanathan, Jacob Munkberg, Petrik Clarberg, Marco Salvi
Article No.: 23
DOI: 10.1145/2699647

We present a novel algorithm for reconstructing high-quality defocus blur from a sparsely sampled light field. Our algorithm builds upon recent developments in the area of sheared reconstruction filters and significantly improves reconstruction...