Image processing method

A method of processing an image with a lens assembly having a given focal length for acquiring images, comprising:

• a) acquiring an image of a scene including a detected imaged object having a recognizable feature and determining whether the detected imaged object is a false face or other false object comprising the recognizable feature, where a false object is one which does not conform to normal anthropometric rules;
• b) if the imaged object is determined to be a false face or other false object, determining, based on variation in focus position, a lens actuator setting providing a maximum sharpness for said false object;
• c) determining a lens displacement corresponding to said lens actuator setting for said false object;
• d) calculating a distance to said false object based on said lens displacement;
• e) determining a dimension of said recognizable feature of said false object as a function of said distance to said false object, size of said imaged false object and the focal length of the lens assembly with which said image of said false object comprising the recognizable feature was acquired;
• and
• f) performing autofocusing based on said determined dimension of said recognizable feature of said imaged false object instead of an assumed dimension of said feature for subsequent processing of images of said scene including said false object.