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Abstract

Systems, methods, and processes are provided for locating pupils in a portrait image for applications such as facial recognition, facial authentication, and manufacture of identification documents. One proposed method comprises three steps; skin detection, eye detection, and pupil detection. In the first step, the skin detection employs a plurality of Gaussian skin models. In the second step, coarse eye locations are found by using the amount of deviation in the R (red) channel with an image that has been cropped by skin detection. A small block centered at an obtained coarse location is then further processed in pupil detection. The step of pupil detection involves determining a Pupil Index that measures the characteristics of a pupil. Experiments tested on highly jpeg compressed images show that the algorithm of this embodiment successfully locates pupil images. It is believed that this novel technique for locating pupils in images can improve the accuracy of face recognition and/or face authentication.

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First Claim