Extracting features from face regions and auxiliary identification regions of images for person recognition and other applications

A computer-readable medium comprising machine-readable instructions that, when executed by a machine cause the machine to perform operations comprising:

• detecting in an input image a face region containing at least a portion of a person's face;
• identifying in the input image an auxiliary identification region outside the face region;
• determining facial features characterizing the face region;
• calculating auxiliary identification features characterizing the auxiliary identification region;
• deriving an indexing datum from the facial features and the auxiliary identification features;
• and
• storing the indexing datum in association with the input image.

A system, comprising:

• computing hardware operable to perform operations comprising
• detecting in an input image a face region containing at least a portion of a person's face;
• identifying in the input image an auxiliary identification region outside the face region;
• determining facial features characterizing the face region and calculate auxiliary identification features characterizing the auxiliary identification region;
• and
• deriving an indexing datum from the facial features and the auxiliary identification features, and to store the indexing datum in association with the input image.