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Daniel G. Aliaga |
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Assistant
Professor of Computer Science Purdue
University 305 N.
University St. West
Lafayette, IN 47907-2066 Office:
(765) 496-7943 FAX:
(765) 494-0739 Email:
aliaga at cs purdue edu |
Academic History
o Assistant Professor, Purdue University, 2003-present.
o Research Staff, Princeton University, 2003.
o Member of Technical Staff, Bell Labs, 1999-2002.
o Ph.D., Computer Science, University of North Carolina at Chapel Hill,
1993-1999.
o M.S., Computer Science, University of North Carolina at Chapel Hill,
1991-1993.
o B.S. Computer Science, Magna Cum
Laude, Honors, Brown University, 1987-1991.
o High School, Colegio Santa Maria, Lima - Peru,
1982-1986.
Research
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We present a photogeometric framework for acquiring
highly-detailed models of 3D objects and for enabling interactive and
close-up digital inspection. A key inspiration for our framework is that of
simultaneously supporting a photometric and geometric-based approach thus
producing a self-calibrating photogeometric modeling system. |
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Our objective is to capture and modify models of urban
environments. To date, we have developed several algorithms used ground-level
imagery, aerial-imagery, procedural modeling, and street and parcel vector
data in to create/modify 3D geometry and 2D layouts. |
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Modeling real-world scenes, beyond diffuse objects, plays
an important role in computer graphics. For structured-light systems, we
first present a robust pixel classification algorithm. Second, we apply an
iterative and adaptive algorithm to further reduce the inter-reflection
within the scene. Thus, more points can be decoded and reconstructed after
each iteration. |
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Creating models of dynamic 3D objects is an important part
of content generation for computer graphics. If the states or poses of the
dynamic object repeat often (but not necessarily periodically), we call such
a repetitive motion. Our approach enables robustly acquiring and obtaining
space-time 3D models of repetitive motions using as few as two cameras or one
camera-projector pair. |
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We investigate an approach for simplifying the
reconstruction process by mathematically eliminating external camera
parameters. This results in less parameters to estimate and in an overall significantly
more robust and accurate reconstruction. Unlike self-calibration, omitting
pose parameters from the acquisition process implies no external calibration
data must be computed or provided. |
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Obtaining image sequences of popular and active
environments is often hindered by unwanted interfering occluders. In this
work, we propose a family of Occlusion-Resistant Camera (ORC) designs for
acquiring such environments. Our cameras explicitly remove interfering
occluders from acquired data in real-time and during live capture. |
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We present an image-based approach to providing
interactive and photorealistic walkthroughs of complex indoor environments.
Our strategy is to obtain a dense sampling of viewpoints in a large static
environment with omnidirectional images and to replace the 3D reconstruction
challenges with easier problems of motorized-cart control, dense image-based
sampling, and compression. |
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The project investigates several graphical and educational
tools using Tablet PCs. We have developed hardware and software tools for
tabletop mixed-reality and for Tablet PC applications in classrooms. |
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A key component of providing realism is rendering large
and detailed 3D models at high frame rates. We explore various rendering
acceleration methods, including visibility culling, geometry simplification,
and image-based rendering. |
[CGVLAB:
Computer Graphics and Visualization Lab at Purdue University]
Publications
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Courses
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Number |
Title |
Year |
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CS590G/CS635 |
Capturing, Modeling, Rendering 3D Structures |
Fall 2003, Fall 2004,
Spring 2007, Spring
2009 |
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CS590M |
Geometric Modeling and Applications |
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CS535 |
Interactive Computer Graphics |
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CS490G |
Tablet PC Graphics |
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CS397/CS497 |
Honor's Research |
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CS334 |
Fundamentals of Computer Graphics |
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CS251 |
Data Structures |
AMIGOS: Association for Minorities in Graphics and Other Sciences
Students
Graduate:
Advisee’s
Yi Xu (CS, PhD candidate)
Alvin Law (CS, PhD candidate)
Carlos Vanegas (CS, PhD candidate)
Yu-Hong Yeung
(CS, PhD candidate)
Daniel
Bekins (CS, MS 2005, now at EA)
Scott
Yost (CS, MS 2004, now at Microsoft)
Committee
member:
Ji Zhang (Math, PhD
candidate)
Mihai
Mudure (CS, PhD, 2008, now at Google)
Huiying
Xu (CS, PhD, 2007, now at Cisco)
David
Gotz (CS, PhD 2005, UNC, now at IBM Research)
Undergraduate:
Aaron
Link (CS, current)
Robert
Insley (CS, BS 2007)
Paul
Ardis (CS, BS 2005, now at Univ. Rochester)
Jamie
Gennis (CS, BS 2005, now at NVIDIA)
Professional Activities
o Editor for Graphical Models
o Conference Co-Chair for ACM Symposium on Interactive 3D Graphics
and Gaming 2009
o Program Committee for HyperText 2008
o Program Committee for Pacific Graphics
2008
o Program Committee for SIBGRAPI 2008
o Program Committee for ACM Symposium in
Interactive 3D Graphics 2008
o Student Stipend Chair for ACM Symposium on Interactive 3D
Graphics and Gaming 2008
o Program Committee for ACM Int'l
Symposium on Mixed and Augmented Reality 2007
o Program Committee for Pacific Graphics
2007
o Program Committee for Symposium on
Point-based Graphics 2007
o Program Committee for SIBGRAPI 2007
o Program Committee for ACM Symposium in
Interactive 3D Graphics 2007
o Program Committee for Int'l Conference
on Computer Graphics Theory and Applications 2007
o Program Committee for Symposium on
Point-based Graphics 2006
o Program Committee for ACM Int'l
Symposium on Mixed and Augmented Reality 2006
o Program Committee for Virtual Reality
Software and Technology 2006
o Program Committee for Pacific Graphics
2006
o Program Committee for ACM Symposium in
Interactive 3D Graphics 2006
o Program Committee for Int'l Conference
on Computer Graphics Theory and Applications 2006
o Program Committee for SIBGRAPI 2006
o Program Committee for Symposium on
Point-based Graphics 2005
o Program Committee for ACM Int'l
Symposium on Mixed and Augmented Reality 2005
o Program Committee for ACM Symposium in
Interactive 3D Graphics 2005
o Program Committee for Symposium on
Point-based Graphics 2004
o NSF Graphics Panel 2002
o NSF Graphics Panel 2001
o ACM SIGGRAPH Course Organizer 2000
o ACM SIGGRAPH Course Organizer 1999
Personal
o Hobbies:
vintage computers, astronomy, model trains, martial arts, soccer, mountain
biking
o Languages:
English, Spanish, some German