METHOD AND DEVICE FOR DETECTING THE ORIENTATION OF AN AREA OF THE BODY OF AN INDIVIDUAL RESTING ON AN APPOSITION AREA OF A MOUNTING OF A BIOMETRIC SENSOR

摘要

The present invention relates to a method and an apparatus for detecting the orientation of an individual body area (DO) placed in an attachment region (AP) of a mounting base (P) of a biometric sensor, wherein the biometric mounting base (P) (DO) from the radiation that is able to pass through the body tissues and be reflected from the hemoglobin by the total reflection of the radiation in the body region (DO) I2. The method comprises the steps of: (1) first determining a longitudinal axis (A) of the body region depicted in the first image; (2) identifying two longitudinal edges (B1, B2) of the body region depicted in the second image; Determining in the reference frame an orientation of the body region with respect to the mount from a measurement of the relative positions of the two edges (B1, B2) and the axis (A) determined in the reference frame . The present invention also relates to a biometric sensor and a personal identification unit comprising such a device.