{'fraction_non_alphanumeric': 0.008465608465608466, 'fraction_numerical': 0.0, 'mean_word_length': 6.007407407407407, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Automatic Fingerprint Recognition Employing Optical Phase-Modulated Joint Transform Correlation

Automatic recognition of an unknown fingerprint is an important tool of any security system. An optical joint transform correlation technique is proposed for efficient real-time recognition of fingerprints. The optical correlator incorporates phase modulation of the reference fingerprint to avoid unnecessary correlation signals and hence make the best utilization of the space and bandwidth resources. The given input image of a fingerprint is correlated directly with the reference fingerprint and a highly distinctive correlation signal is produced if the given fingerprint is of an authorized person, while a negligible correlation signal is produced for all unauthorized fingerprints. The proposed technique is capable of recognizing multiple authorized fingerprints simultaneously in a given input scene containing more than one fingerprint.