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MOVEMENT DETECTION AND SPATIAL PHASE *
Author(s) -
Murray I. J.,
Kuijkowski J. J.
Publication year - 1984
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1111/j.1475-1313.1984.tb00335.x
Subject(s) - spatial frequency , phase (matter) , movement (music) , contrast (vision) , optics , sensitivity (control systems) , physics , grating , acoustics , quantum mechanics , electronic engineering , engineering
Contrast thresholds for the detection of movement are determined when a sinusoidal grating pattern is shifted in spatial phase. “True” contrast reversal (180° phase shift) is compared with smaller phase shifts for a range of spatial frequencies. An unexpected increase in movement sensitivity is repealed for intermediate spatial frequencies. This effect is confined to those spatial frequencies where interaction between pattern and movement detectors occurs.