An Extended Set of Haarlike Features for Rapid （快速扩展的Haarlike特性）.pdfVIP

An Extended Set of Haar-like Features for Rapid Object Detection Rainer Lienhart and Jochen Maydt Intel Labs, Intel Corporation, Santa Clara, CA 95052, USA Rainer.Lienhart@ ABSTRACT W Recently Viola et al. [5] have introduced a rapid object detection Window h w scheme based on a boosted cascade of simple features. In this paper w we introduce a novel set of rotated haar-like features, which significantly enrich this basic set of simple haar-like features and which can also be calculated very efficiently. At a given hit rate our h w H sample face detector shows off on average a 10% lower false alarm rate by means of using these additional rotated features. We also upright rectangle h present a novel post optimization procedure for a given boosted cascade improving on average the false alarm rate further by 12.5%. 45 rotated rectangle Using both enhancements the number of false detections is only 24 at a hit rate of 82.3% on the CMU face set [7]. Figure 1. Examples of an upright and 45° rotated rectangle. 1 Introduction feature = ∑ ω ⋅RecSum (r ) , Recently Viola et al. have proposed a multi-stage classification I