374 search results - page 4 / 75 » Sparse representation of images with hybrid linear models |
CIMAGING
2009
13 years 9 months ago
2009
The surface reflectance function of many common materials varies slowly over the visible wavelength range. For this reason, linear models with a small number of bases (5-8) are fr...
DAGSTUHL
2007
13 years 10 months ago
2007
We address the problem of finding sparse wavelet representations of high-dimensional vectors. We present a lower-bounding technique and use it to develop an algorithm for computi...
42
Voted
FGR
2011
IEEE
13 years 1 days ago
2011
IEEE
This paper presents a novel framework for recognition of facial action unit (AU) combinations by viewing the classification as a sparse representation problem. Based on this framew...
ICIP
2001
IEEE
14 years 10 months ago
2001
IEEE
An elementary proof of a basic uncertainty principle concerning pairs of representations of ?? vectors in different orthonormal bases is provided. The result, slightly stronger th...
ICASSP
2010
IEEE
13 years 7 months ago
2010
IEEE
In many signal processing problems, it may be fruitful to represent the signal under study in a redundant linear decomposition called a frame. If a probabilistic approach is adopt...