{'fraction_non_alphanumeric': 0.023411371237458192, 'fraction_numerical': 0.0, 'mean_word_length': 4.815533980582524, '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}}
Noise-Target Measurement of MTF

Measurement of a system’s transfer function by means of its response to random-noise inputs has long been a standard procedure in time-domain systems. If the input is white noise, which contains equal amounts of all frequencies, the action of the transfer function is to impart a nonuniformity of frequency content that can be assessed at the output of the system by means of a Fourier analysis. This concept has not historically been employed in the measurement of optical systems, with the exception of an initial demonstration using (non-white) film-grain noise.