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ACM Transactions on Graphics (TOG), Volume 30 Issue 2, April 2011

Interactive editing of massive imagery made simple: Turning Atlanta into Atlantis
Brian Summa, Giorgio Scorzelli, Ming Jiang, Peer-Timo Bremer, Valerio Pascucci
Article No.: 7
DOI: 10.1145/1944846.1944847

This article presents a simple framework for progressive processing of high-resolution images with minimal resources. We demonstrate this framework's effectiveness by implementing an adaptive, multi-resolution solver for gradient-based image...

The area perspective transform: A homogeneous transform for efficient in-volume queries
Warren A. Hunt, Gregory S. Johnson
Article No.: 8
DOI: 10.1145/1944846.1944848

A key problem in applications such as soft shadows and defocus blur is to identify points or primitives which are inside a volume of space. For example, the soft shadow computation involves finding surfaces which pass in front of an area light as...

Frequency analysis and sheared filtering for shadow light fields of complex occluders
Kevin Egan, Florian Hecht, Frédo Durand, Ravi Ramamoorthi
Article No.: 9
DOI: 10.1145/1944846.1944849

Monte Carlo ray tracing of soft shadows produced by area lighting and intricate geometries, such as the shadows through plant leaves or arrays of blockers, is a critical challenge. The final image often has relatively smooth shadow patterns, since...

An efficient scheme for curve and surface construction based on a set of interpolatory basis functions
Ren-Jiang Zhang, Weiyin Ma
Article No.: 10
DOI: 10.1145/1944846.1944850

An efficient scheme is introduced to construct interpolatory curves and surfaces passing through a set of given scattered data points. The scheme is based on an interpolatory basis derived from the sinc function with a Guassian multiplier...

Metropolis procedural modeling
Jerry O. Talton, Yu Lou, Steve Lesser, Jared Duke, Radomír Měch, Vladlen Koltun
Article No.: 11
DOI: 10.1145/1944846.1944851

Procedural representations provide powerful means for generating complex geometric structures. They are also notoriously difficult to control. In this article, we present an algorithm for controlling grammar-based procedural models. Given a...

Image and video upscaling from local self-examples
Gilad Freedman, Raanan Fattal
Article No.: 12
DOI: 10.1145/1944846.1944852

We propose a new high-quality and efficient single-image upscaling technique that extends existing example-based super-resolution frameworks. In our approach we do not rely on an external example database or use the whole input image as a source...

Edge-aware color appearance
Min H. Kim, Tobias Ritschel, Jan Kautz
Article No.: 13
DOI: 10.1145/1944846.1944853

Color perception is recognized to vary with surrounding spatial structure, but the impact of edge smoothness on color has not been studied in color appearance modeling. In this work, we study the appearance of color under different degrees of edge...

Interactive architectural modeling with procedural extrusions
Tom Kelly, Peter Wonka
Article No.: 14
DOI: 10.1145/1944846.1944854

We present an interactive procedural modeling system for the exterior of architectural models. Our modeling system is based on procedural extrusions of building footprints. The main novelty of our work is that we can model difficult architectural...

Frame-based elastic models
Benjamin Gilles, Guillaume Bousquet, Francois Faure, Dinesh K. Pai
Article No.: 15
DOI: 10.1145/1944846.1944855

We present a new type of deformable model which combines the realism of physically-based continuum mechanics models and the usability of frame-based skinning methods. The degrees of freedom are coordinate frames. In contrast with traditional...