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TIP
2008
121views more  TIP 2008»
15 years 6 months ago
Bistatic Synthetic Aperture Radar Imaging for Arbitrary Flight Trajectories
Abstract--In this paper, we present an analytic, filtered backprojection (FBP) type inversion method for bistatic synthetic aperture radar (BISAR). We consider a BISAR system where...
Can Evren Yarman, Birsen Yazici, Margaret Cheney
TOG
2008
139views more  TOG 2008»
15 years 6 months ago
Shield fields: modeling and capturing 3D occluders
We describe a unified representation of occluders in light transport and photography using shield fields: the 4D attenuation function which acts on any light field incident on an ...
Douglas Lanman, Ramesh Raskar, Amit K. Agrawal, Ga...
VC
2008
93views more  VC 2008»
15 years 6 months ago
Efficient product sampling using hierarchical thresholding
Abstract We present an efficient method for importance sampling the product of multiple functions. Our algorithm computes a quick approximation of the product on-the-fly, based on ...
Fabrice Rousselle, Petrik Clarberg, Luc Leblanc, V...
CGF
2004
158views more  CGF 2004»
15 years 6 months ago
Combined Correlated and Importance Sampling in Direct Light Source Computation and Environment Mapping
This paper presents a general variance reduction method that is a quasi-optimal combination of correlated and importance sampling. The weights of the combination are selected auto...
László Szécsi, Mateu Sbert, L...
CGF
2000
102views more  CGF 2000»
15 years 6 months ago
Tone Reproduction for Interactive Walkthroughs
When a rendering algorithm has created a pixel array of radiance values the task of producing an image is not yet completed. In fact, to visualize the result the radiance values s...
Annette Scheel, Marc Stamminger, Hans-Peter Seidel