Facial recognition system that compares narrow band ultraviolet-absorbing skin chromophores

A facial recognition system that compares narrow band ultraviolet-absorbing skin chromophores, comprising:

• an ultraviolet spectrum image capture element comprising
• a filter that selects wavelengths in an ultraviolet band;
• and
• an ultraviolet camera that is sensitive to at least said wavelengths in said ultraviolet band;
• a database of person facial images captured in said ultraviolet band, wherein each person facial image of said person facial images is associated with a corresponding person of a plurality of persons;
• and
• one or more processors coupled to said ultraviolet camera and to said database, configured to
• identify person features in said each person facial image;
• calculate person feature descriptors of said person features of said each person facial image;
• obtain a subject image associated with a subject in said ultraviolet band from said ultraviolet camera;
• locate a subject facial image in said subject image;
• identify subject features in said subject facial image;
• calculate subject feature descriptors of said subject features;
• compare said subject feature descriptors to said person feature descriptors of said each person facial image to calculate a correlation score associated with said each person facial image wherein said calculate said correlation score comprises
• calculate matching feature lines comprising a line segment corresponding to each matching feature pair, wherein said line segment is between a subject feature of said matching feature pair and a corresponding person feature of said matching feature pair, and
• calculate said correlation score based on said matching feature lines;
• select a matching person facial image as a person facial image of said person facial images with a highest associated correlation score, when said highest associated correlation score is greater than a threshold value;
• and,
• identify said subject with the corresponding person associated with said matching person facial image.