Purpose – To report on the evaluation of error of a face matching system consisting of a 3D sensor for obtaining the surface of the face, and a two‐stage matching algorithm that matches the sensed surface to a model surface. Design/methodology/approach – Rigid mannikin face that was, otherwise, fairly realistic was obtained, and several sensing and matching experiments were performed. Pose position, lighting and face color were controlled. Findings – The combined sensor‐matching system typically reported correct face surface matches with trimmed RMS error of 0.5 mm or less for a generous volume of parameters, including roll, pitch, yaw, position, lighting, and facecolor. Error accelerated beyond this “approximately frontal” set of parameters. Mannikin results are compared to results with thousands of cases of real faces. The sensor accuracy is not a limiting component of the system, but supports the application well. Practical implications – The sensor supports the application well (except for the current cost). Equal error rates achieved appear to be practical for face verification. Originality/value – No similar report is known for sensing faces.
Sensor Review – Emerald Publishing
Published: Apr 1, 2006
Keywords: Biodata; Sensors; Error analysis; Pattern recognition
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