2295 search results - page 9 / 459 » Learning Overcomplete Representations |
ICASSP
2010
IEEE
13 years 8 months ago
2010
IEEE
We propose a new method for imaging sound speed in breast tissue from measurements obtained by ultrasound tomography (UST) scanners. Given the measurements, our algorithm finds a...
TSP
2008
13 years 8 months ago
2008
Sparse signal representations and approximations from overcomplete dictionaries have become an invaluable tool recently. In this paper, we develop a new, heuristic, graph-structure...
NIPS
2007
13 years 10 months ago
2007
Computational models of visual cortex, and in particular those based on sparse coding, have enjoyed much recent attention. Despite this currency, the question of how sparse or how...
ICIP
2002
IEEE
14 years 10 months ago
2002
IEEE
Overcomplete transforms, like the Dual-Tree Complex Wavelet Transform, offer more flexible signal representations than criticallysampled transforms. Large numbers of transform coe...
CORR
2008
Springer
13 years 8 months ago
2008
Springer
1 Recently, great attention was intended toward overcomplete dictionaries and the sparse representations they can provide. In a wide variety of signal processing problems, sparsity...