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Improving facial expression analysis using histograms of Log-Transformed Nonnegative Sparse Representation with a Spatial Pyramid Structure.
Ping Liu
Shizhong Han
Yan Tong
Published in:
FG (2013)
Keyphrases
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sparse representation
image classification
dictionary learning
sparse coding
image representation
face recognition
negative matrix factorization
signal processing
object tracking
test images
image patches
high dimensional data
bag of words
gaussian mixture model
multiscale
three dimensional
image processing