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ACM Transactions on Graphics (TOG), Volume 35 Issue 5, September 2016

DisCo: Display-Camera Communication Using Rolling Shutter Sensors
Kensei Jo, Mohit Gupta, Shree K. Nayar
Article No.: 150
DOI: 10.1145/2896818

We present DisCo, a novel display-camera communication system. DisCo enables displays and cameras to communicate with each other while also displaying and capturing images for human consumption. Messages are transmitted by temporally modulating...

Example-Based Sketch Segmentation and Labeling Using CRFs
Rosália G. Schneider, Tinne Tuytelaars
Article No.: 151
DOI: 10.1145/2898351

We introduce a new approach for segmentation and label transfer in sketches that substantially improves the state of the art. We build on successful techniques to find how likely each segment is to belong to a label, and use a Conditional Random...

Interactive High-Quality Green-Screen Keying via Color Unmixing
Yağiz Aksoy, Tunç Ozan Aydin, Marc Pollefeys, Aljoša Smolić
Article No.: 152
DOI: 10.1145/2907940

Due to the widespread use of compositing in contemporary feature films, green-screen keying has become an essential part of postproduction workflows. To comply with the ever-increasing quality requirements of the industry, specialized compositing...

Image Perforation: Automatically Accelerating Image Pipelines by Intelligently Skipping Samples
Liming Lou, Paul Nguyen, Jason Lawrence, Connelly Barnes
Article No.: 153
DOI: 10.1145/2904903

Image pipelines arise frequently in modern computational photography systems and consist of multiple processing stages where each stage produces an intermediate image that serves as input to a future stage. Inspired by recent work on loop...

Printed Perforated Lampshades for Continuous Projective Images
Haisen Zhao, Lin Lu, Yuan Wei, Dani Lischinski, Andrei Sharf, Daniel Cohen-Or, Baoquan Chen
Article No.: 154
DOI: 10.1145/2907049

We present a technique for designing three-dimensional- (3D) printed perforated lampshades that project continuous grayscale images onto the surrounding walls. Given the geometry of the lampshade and a target grayscale image, our method computes a...

A Probabilistic Model for Exteriors of Residential Buildings
Lubin Fan, Peter Wonka
Article No.: 155
DOI: 10.1145/2910578

We propose a new framework to model the exterior of residential buildings. The main goal of our work is to design a model that can be learned from data that is observable from the outside of a building and that can be trained with widely available...

Nonuniform Spatial Deformation of Light Fields by Locally Linear Transformations
Clemens Birklbauer, David C. Schedl, Oliver Bimber
Article No.: 156
DOI: 10.1145/2928267

Light-field cameras offer new imaging possibilities compared to conventional digital cameras. However, the additional angular domain of light fields prohibits direct application of frequently used image processing algorithms, such as warping,...

Hexahedral-Dominant Meshing
Dmitry Sokolov, Nicolas Ray, Lionel Untereiner, Bruno Lévy
Article No.: 157
DOI: 10.1145/2930662

This article introduces a method that generates a hexahedral-dominant mesh from an input tetrahedral mesh. It follows a three-step pipeline similar to the one proposed by Carrier Baudoin et al.: (1) generate a frame field, (2) generate a pointset...

Efficient and Flexible Deformation Representation for Data-Driven Surface Modeling
Lin Gao, Yu-Kun Lai, Dun Liang, Shu-Yu Chen, Shihong Xia
Article No.: 158
DOI: 10.1145/2908736

Effectively characterizing the behavior of deformable objects has wide applicability but remains challenging. We present a new rotation-invariant deformation representation and a novel reconstruction algorithm to accurately reconstruct the...

A Non-Parametric Factor Microfacet Model for Isotropic BRDFs
Mahdi M. Bagher, John Snyder, Derek Nowrouzezahrai
Article No.: 159
DOI: 10.1145/2907941

We investigate the expressiveness of the microfacet model for isotropic bidirectional reflectance distribution functions (BRDFs) measured from real materials by introducing a non-parametric factor model that represents the model’s...

Integration with Stochastic Point Processes
A. Cengiz Öztireli
Article No.: 160
DOI: 10.1145/2932186

We present a novel comprehensive approach for studying error in integral estimation with point distributions based on point process statistics. We derive exact formulae for bias and variance of integral estimates in terms of the spatial or...