Precise Pupil Contour Detection Based on Minimizing the Energy of Pattern and Edge

We propose a new method to precisely detect pupil contours in faces. The method is based on minimizing the energy of pattern and edge. The basic idea of this method is that the energy, which consists of the pattern and the edge energy, has to be minimized. An efficient search method is also introduced to overcome the underlying problem of efficiency of energy minimization methods. "Guide patterns" are introduced for this purpose. Moreover, to detect pupils more precisely we use an ellipse model as pupil shape in this paper. Experimental results are also described.