12 September 2005 Face detection by optimal atomic decomposition
Author Affiliations +
Abstract
Atomic decompositions are lower-cost alternatives to the principal component analysis (PCA) in tasks where sparse signal representation is required. In pattern classifications tasks, e.g. face detection, a careful selection of atoms is needed in order to ensure an optimal and fast-operating decomposition to be used in the feature extraction stage. In this contribution, adaptive boosting is used as criterion for selecting optimal atoms as features in frontal face detection system. The goal is to speed up the learning process by a proper combination of a dictionary of atoms and a weak learner. Dictionaries of anisotropic wavelet packets are used where the total number of atoms is still feasible for large-size images. In the adaptive boosting algorithm a Bayesian classifier is used as a weak learner instead of a simple threshold, thus ensuring a higher accuracy for slightly increased computational cost during the detection stage. The experimental results obtained for four different dictionaries are quite promising based on the good localization properties of the anisotropic wavelet packet functions.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Vladislav Uzunov, Vladislav Uzunov, Atanas Gotchev, Atanas Gotchev, Karen Egiazarian, Karen Egiazarian, Jaakko Astola, Jaakko Astola, } "Face detection by optimal atomic decomposition", Proc. SPIE 5916, Mathematical Methods in Pattern and Image Analysis, 59160G (12 September 2005); doi: 10.1117/12.622564; https://doi.org/10.1117/12.622564
PROCEEDINGS
12 PAGES


SHARE
Back to Top