Ansatte – Københavns Universitet

Feature extraction and learning using context cue and Rényi entropy based mutual information

Publikation: Bidrag til bog/antologi/rapportKonferencebidrag i proceedingsForskningfagfællebedømt

Hong Pan, Søren Ingvor Olsen, Yaping Zhu

Feature extraction and learning play a critical role for visual perception tasks. We focus on improving the robustness of the kernel descriptors (KDES) by embedding context cues and further learning a compact and discriminative feature codebook for feature reduction using Rényi entropy based mutual information. In particular, for feature extraction, we develop a new set of kernel descriptors−Context Kernel Descriptors (CKD), which enhance the original KDES by embedding the spatial context into the descriptors. Context cues contained in the context kernel enforce some degree of spatial consistency, thus improving the robustness of CKD. For feature learning and reduction, we propose a novel codebook learning method, based on a Rényi quadratic entropy based mutual information measure called Cauchy-Schwarz Quadratic Mutual Information (CSQMI), to learn a compact and discriminative CKD codebook. Projecting the original full-dimensional CKD onto the codebook, we reduce the dimensionality of CKD while preserving its discriminability. Moreover, the latent connection between Rényi quadratic entropy and the mapping data in kernel feature space further facilitates us to capture the geometric structure as well as the information about the underlying labels of the CKD using CSQMI. Thus the resulting codebook and reduced CKD are discriminative. We verify the effectiveness of our method on several public image benchmark datasets such as YaleB, Caltech-101 and CIFAR-10, as well as a challenging chicken feet dataset of our own. Experimental results show that our method has promising potential for visual object recognition and detection applications.
TitelPattern recognition: applications and methods : 4th International Conference, ICPRAM 2015, Lisbon, Portugal, January 10-12, 2015, Revised Selected Papers
RedaktørerAna Fred, Maria De Marsico, Mário Figueiredo
Antal sider20
ISBN (Trykt)978-3-319-27676-2
ISBN (Elektronisk)978-3-319-27677-9
StatusUdgivet - 2015
Begivenhed4th International Conference on Pattern Recognition: Applications and Methods - Lissabon, Portugal
Varighed: 10 jan. 201512 jan. 2015
Konferencens nummer: 4


Konference4th International Conference on Pattern Recognition: Applications and Methods
NavnLecture notes in computer science

ID: 154047214