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Journal of Electronic Imaging

Lean histogram of oriented gradients features for effective eye detection
Author(s): Riti Sharma; Andreas Savakis
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Paper 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.

Paper Details

Date Published: 23 November 2015
PDF: 12 pages
J. Electron. Imag. 24(6) 063007 doi: 10.1117/1.JEI.24.6.063007
Published in: Journal of Electronic Imaging Volume 24, Issue 6
Show Author Affiliations
Riti Sharma, Rochester Institute of Technology (United States)
Andreas Savakis, Rochester Institute of Technology (United States)

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