Lean histogram of oriented gradients features for effective eye detection

Riti Sharma; Andreas Savakis

doi:10.1117/1.JEI.24.6.063007

23 November 2015 Lean histogram of oriented gradients features for effective eye detection

Riti Sharma, Andreas Savakis

Author Affiliations +

Journal of Electronic Imaging, Vol. 24, Issue 6, 063007 (November 2015). https://doi.org/10.1117/1.JEI.24.6.063007

Abstract

Reliable object detection is very important in computer vision and robotics applications. The histogram of oriented gradients (HOG) is established as one of the most popular hand-crafted features, which along with support vector machine (SVM) classification provides excellent performance for object recognition. We investigate dimensionality deduction on HOG features in combination with SVM classifiers to obtain efficient feature representation and improved classification performance. In addition to lean HOG features, we explore descriptors resulting from dimensionality reduction on histograms of binary descriptors. We consider three-dimensionality reduction techniques: standard principal component analysis, random projections, a computationally efficient linear mapping that is data independent, and locality preserving projections (LPP), which learns the manifold structure of the data. Our methods focus on the application of eye detection and were tested on an eye database created using the BioID and FERET face databases. Our results indicate that manifold learning is beneficial to classification utilizing HOG features. To demonstrate the broader usefulness of lean HOG features for object class recognition, we evaluated our system’s classification performance on the CalTech-101 dataset with favorable outcomes.

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Riti Sharma and Andreas Savakis "Lean histogram of oriented gradients features for effective eye detection," Journal of Electronic Imaging 24(6), 063007 (23 November 2015). https://doi.org/10.1117/1.JEI.24.6.063007

Published: 23 November 2015

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