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- Daniel Vlasic, Ilya Baran, Wojciech Matusik, Jovan Popovic
- ACM Trans. Graph.
- 2008

Details in mesh animations are difficult to generate but they have great impact on visual quality. In this work, we demonstrate a practical software system for capturing such details from multi-view video recordings. Given a stream of synchronized video images that record a human performance from multiple viewpoints and an articulated template of the… (More)

- Ilya Baran, Jovan Popovic
- ACM Trans. Graph.
- 2007

Animating an articulated 3D character currently requires manual rigging to specify its internal skeletal structure and to define how the input motion deforms its surface. We present a method for animating characters automatically. Given a static character mesh and a generic skeleton, our method adapts the skeleton to the character and attaches it to the… (More)

- Alec Jacobson, Ilya Baran, Jovan Popovic, Olga Sorkine-Hornung
- ACM Trans. Graph.
- 2011

Object deformation with linear blending dominates practical use as the fastest approach for transforming raster images, vector graphics, geometric models and animated characters. Unfortunately, linear blending schemes for skeletons or cages are not always easy to use because they may require manual weight painting or modeling closed polyhedral envelopes… (More)

- Ilya Baran, Erik D. Demaine, Mihai Patrascu
- Algorithmica
- 2005

We obtain subquadratic algorithms for 3SUM on integers and rationals in several models. On a standard word RAM with w-bit words, we obtain a running time of $O(n^{2}/\max\{\frac{w}{\lg^{2}w},\frac{\lg^{2}n}{(\lg\lg n)^{2}}\})$ . In the circuit RAM with one nonstandard AC 0 operation, we obtain $O(n^{2}/\frac{w^{2}}{\lg^{2}w})$ . In external memory, we… (More)

- Alec Jacobson, Ilya Baran, Ladislav Kavan, Jovan Popovic, Olga Sorkine-Hornung
- ACM Trans. Graph.
- 2012

Skinning transformations are a popular way to articulate shapes and characters. However, traditional animation interfaces require all of the skinning transformations to be specified explicitly, typically using a control structure (a rig). We propose a system where the user specifies only a subset of the degrees of freedom and the rest are automatically… (More)

- Daniel Vlasic, Pieter Peers, +4 authors Wojciech Matusik
- ACM Trans. Graph.
- 2009

We describe a system for high-resolution capture of moving 3D geometry, beginning with dynamic normal maps from multiple views. The normal maps are captured using active shape-from-shading (photometric stereo), with a large lighting dome providing a series of novel spherical lighting configurations. To compensate for low-frequency deformation, we perform… (More)

- Jiawen Chen, Ilya Baran, Frédo Durand, Wojciech Jarosz
- SI3D
- 2011

Light scattering in a participating medium is responsible for several important effects we see in the natural world. In the presence of occluders, computing single scattering requires integrating the illumination scattered towards the eye along the camera ray, modulated by the visibility towards the light at each point. Unfortunately, incorporating… (More)

- Linjie Luo, Ilya Baran, Szymon Rusinkiewicz, Wojciech Matusik
- ACM Trans. Graph.
- 2012

3D printing technology is rapidly maturing and becoming ubiquitous. One of the remaining obstacles to wide-scale adoption is that the object to be printed must fit into the working volume of the 3D printer. We propose a framework, called Chopper, to decompose a large 3D object into smaller parts so that each part fits into the printing volume. These parts… (More)

- Ilya Baran, Jiawen Chen, Jonathan Ragan-Kelley, Frédo Durand, Jaakko Lehtinen
- ACM Trans. Graph.
- 2010

Volumetric effects such as beams of light through participating media are an important component in the appearance of the natural world. Many such effects can be faithfully modeled by a single scattering medium. In the presence of shadows, rendering these effects can be prohibitively expensive: current algorithms are based on ray marching, i.e., integrating… (More)

- Daniele Panozzo, Ilya Baran, Olga Diamanti, Olga Sorkine-Hornung
- ACM Trans. Graph.
- 2013

We consider the problem of generalizing affine combinations in Euclidean spaces to triangle meshes: computing weighted averages of points on surfaces. We address both the <i>forward problem</i>, namely computing an average of given anchor points on the mesh with given weights, and the <i>inverse problem</i>, which is computing the weights given anchor… (More)