Detection and Orientation Estimation for Cyclists by Max Pooled Features

In this work we propose a new kind of HOG feature which is built by the max pooling operation over spatial bins and orientation channels in multilevel and can efficiently deal with deformation of objects in images. We demonstrate its invariance against both translation and rotation in feature levels. Experimental results show a great precision gain on detection and orientation estimation for cyclists by applying this new feature on classical cascaded detection frameworks. In combination of the geometric constraint, we also show that our system can achieve a real time performance for simultaneous cyclist detection and its orientation estimation.

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