TY - GEN
T1 - Cascade dictionary learning for action recognition
AU - Dong, Jian
AU - Sun, Changyin
AU - Mu, Chaoxu
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2015/1/16
Y1 - 2015/1/16
N2 - In this paper, we propose a cascade dictionary learning algorithm for action recognition. In the first stage, a dictionary for basic sparse coding is learned based on local descriptors. And then spatial pyramid features are extracted to represent all the images in the same dimensions. Instead of performing dimension reduction, all the features are regrouped and then fed into second dictionary learning. In the second stage, a supervised dictionary for block and group sparse coding is learned to get discriminative representations based on the regrouped features. Without lowering classification performance, the size of the second dictionary is much smaller than other dictionary based on spatial pyramid features. We evaluate our algorithm on two publicly available databases about action recognition: Willows and People Playing Music Instrument. The numerical results show the effectiveness of the proposed algorithm.
AB - In this paper, we propose a cascade dictionary learning algorithm for action recognition. In the first stage, a dictionary for basic sparse coding is learned based on local descriptors. And then spatial pyramid features are extracted to represent all the images in the same dimensions. Instead of performing dimension reduction, all the features are regrouped and then fed into second dictionary learning. In the second stage, a supervised dictionary for block and group sparse coding is learned to get discriminative representations based on the regrouped features. Without lowering classification performance, the size of the second dictionary is much smaller than other dictionary based on spatial pyramid features. We evaluate our algorithm on two publicly available databases about action recognition: Willows and People Playing Music Instrument. The numerical results show the effectiveness of the proposed algorithm.
KW - block and group sparse coding
KW - cascade dictionary learning
KW - feature regrouping
KW - spatial pyramid
UR - https://www.scopus.com/pages/publications/84924274163
U2 - 10.1109/CIMSIVP.2014.7013264
DO - 10.1109/CIMSIVP.2014.7013264
M3 - 会议稿件
AN - SCOPUS:84924274163
T3 - IEEE SSCI 2014 - 2014 IEEE Symposium Series on Computational Intelligence - CIMSIVP 2014: 2014 IEEE Symposium on Computational Intelligence for Multimedia, Signal and Vision Processing, Proceedings
BT - IEEE SSCI 2014 - 2014 IEEE Symposium Series on Computational Intelligence - CIMSIVP 2014
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2014 IEEE Symposium on Computational Intelligence for Multimedia, Signal and Vision Processing, CIMSIVP 2014
Y2 - 9 December 2014 through 12 December 2014
ER -