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ECCV
2004
Springer
12 years 1 months ago
A Fourier Theory for Cast Shadows
—Cast shadows can be significant in many computer vision applications, such as lighting-insensitive recognition and surface reconstruction. Nevertheless, most algorithms neglect ...
Ravi Ramamoorthi, Melissa L. Koudelka, Peter N. Be...
ICRA
2009
IEEE
255views Robotics» more  ICRA 2009»
12 years 2 months ago
Combining color-based invariant gradient detector with HoG descriptors for robust image detection in scenes under cast shadows
— In this work we present a robust detection method in outdoor scenes under cast shadows using color based invariant gradients in combination with HoG local features. The method ...
Michael Villamizar, Jorge Scandaliaris, Alberto Sa...
ICPR
2010
IEEE
12 years 2 months ago
Eigenbubbles: An Enhanced Apparent BRDF Representation
In this paper we address the problem of relighting faces in presence of cast shadows and specularities. We present a solution to this problem by capturing the spatially varying Ap...
Ritwik Kumar, Vemuri Baba, Arunava Banerjee
CVPR
2008
IEEE
12 years 10 months ago
Kernel-based learning of cast shadows from a physical model of light sources and surfaces for low-level segmentation
In background subtraction, cast shadows induce silhouette distortions and object fusions hindering performance of high level algorithms in scene monitoring. We introduce a nonpara...
André Zaccarin, Nicolas Martel-Brisson
CVPR
2004
IEEE
12 years 10 months ago
Spherical Harmonics vs. Haar Wavelets: Basis for Recovering Illumination from Cast Shadows
The problem of estimating an illumination distribution from images is called inverse lighting. For inverse lighting, three approaches have been developed based on specular reflect...
Takahiro Okabe, Imari Sato, Yoichi Sato
ICCV
2009
IEEE
13 years 28 days ago
Sparse Representation of Cast Shadows via L1-Regularized Least Squares
Scenes with cast shadows can produce complex sets of images. These images cannot be well approximated by lowdimensional linear subspaces. However, in this paper we show that the...
Xue Mei, Haibin Ling, David W. Jacobs
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