Secured revocable contactless fingerprint template based on center of mass

We propose an algorithm to secure a model stored in a database to reduce the risk of identity theft. It will first determine the coordinates of the center of mass of the image of the registered biometric fingerprint which is the central (reference) point after having defined the area of interest of size N × M having the munities (main features characteristics of the image). A spiral curve is constructed from the distance between the center of mass and each of the munities contained in the image using the modified Hausdorff distance. The spiral curve obtained is subjected to a transformation (translation + rotation).