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LAG CAMERA: A MOVING MULTI-CAMERA ARRAY FOR SCENE ACQUISITION
 

Summary: 1
LAG CAMERA: A MOVING MULTI-CAMERA ARRAY
FOR SCENE ACQUISITION
Daniel G. Aliaga Yi Xu Voicu Popescu
{aliaga|xu43|popescu}@cs.purdue.edu
Department of Computer Science at Purdue University
West Lafayette, IN - USA
ABSTRACT
Many applications, such as telepresence, virtual reality, and interactive walkthroughs, require a three-dimensional (3D)
model of real-world environments. Methods, such as lightfields, geometric reconstruction and computer vision use cameras to
acquire visual samples of the environment and construct a model. Unfortunately, obtaining models of real-world locations is a
challenging task. In particular, important environments are often actively in use, containing moving objects, such as people
entering and leaving the scene. The methods previously listed have difficulty in capturing the color and structure of the
environment while in the presence of moving and temporary occluders. We describe a class of cameras called lag cameras. The
main concept is to generalize a camera to take samples over space and time. Such a camera, can easily and interactively detect
moving objects while continuously moving through the environment. Moreover, since both the lag camera and occluder are
moving, the scene behind the occluder is captured by the lag camera even from viewpoints where the occluder lies in between
the lag camera and the hidden scene. We demonstrate an implementation of a lag camera, complete with analysis and captured
environments.
Keywords: computer graphics, space-time stereo, lightfields, lumigraphs, foreground object removal, camera clusters.

  

Source: Aliaga, Daniel G. - Department of Computer Sciences, Purdue University

 

Collections: Computer Technologies and Information Sciences