Face and facial landmarks location based on log-polar mapping

Abstract

In this paper, a new approach using a single log-polar face template has been adopted to locate a face and its landmarks in a face image with varying scale and rotation parameters. The log-polar mapping which simulates space-variant human visual system converts scale change and rotation of input image into constant horizontal and cyclic vertical shift in the log-polar plane. The intelligent use of this property allows the proposed method to eliminate the need of using multiple templates to cover scale and rotation variations of faces and thus achieves efficient and reliable location of faces and facial landmarks.