AN ANALYSIS OF THE TEMPORAL INTEGRATION MECHANISM IN HUMAN MOTION PERCEPTION

被引:26
作者
FREDERICKSEN, RE
VERSTRATEN, FAJ
VANDEGRIND, WA
机构
[1] UNIV UTRECHT,UTRECHT BIOPHYS RES INST,UTRECHT,NETHERLANDS
[2] UNIV UTRECHT,DEPT COMPARAT PHYSIOL,UTRECHT,NETHERLANDS
[3] UNIV N CAROLINA,DEPT COMP SCI,CHAPEL HILL,NC 27515
关键词
MOTION PERCEPTION; TEMPORAL INTEGRATION; MODELING; MOTION DETECTOR POPULATION;
D O I
10.1016/0042-6989(94)90081-7
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
We present a model for the temporal integration of apparent motion information. The model is constructed by considering psychophysical and neurophysiological data, and consists of the leaky integration of pulsatile motion detector responses to apparent motion stimuli. Each pulse represents a motion detector populational response to a discrete spatial displacement of the spatial pattern. Temporal contrast sensitivity determines the shape of constant-stimulus-duration threshold curves for image frame exposure durations less than about 133 msec. The shape of the threshold curve for image frame exposure durations greater than about 133 msec is determined by the leaky integrator time constant and the shape of the pulses emitted by the motion detectors. The leaky integrator model exhibits threshold saturation behaviour (the reaching of a maximum sensitivity or minimum threshold) seen in psychophysical data as well as dependence of saturation time on the frame rate of the apparent motion stimulus. A low frame rate results in a longer time-to-saturation because the leaky integrator discharges more between detector output pulses. When the motion detector output pulses are far enough apart there is effectively no temporal integration and therefore no threshold improvement over time. Finally, the behaviour of the psychophysical threshold curves across spatial displacement sizes is consistent with a populational-response threshold mechanism combined with spatial summation over a non-uniform distribution of detector types across the visual field.
引用
收藏
页码:3153 / 3170
页数:18
相关论文
共 38 条
[1]   SPATIOTEMPORAL ENERGY MODELS FOR THE PERCEPTION OF MOTION [J].
ADELSON, EH ;
BERGEN, JR .
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION, 1985, 2 (02) :284-299
[2]   ALPHA-STRIPES - A SPATIAL PERIODICITY APPEARING IN STROBOSCOPICALLY ILLUMINATED MOVING RANDOM DOT PATTERNS [J].
ADLER, B ;
BOCK, O ;
GRUSSER, OJ .
VISION RESEARCH, 1981, 21 (06) :913-924
[3]   SPATIAL SUMMATION PROPERTIES OF DIRECTIONALLY SELECTIVE MECHANISMS IN HUMAN VISION [J].
ANDERSON, SJ ;
BURR, DC .
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION, 1991, 8 (08) :1330-1339
[4]   ECCENTRICITY-DEPENDENT SCALING OF THE LIMITS FOR SHORT-RANGE APPARENT MOTION PERCEPTION [J].
BAKER, CL ;
BRADDICK, OJ .
VISION RESEARCH, 1985, 25 (06) :803-812
[5]   TEMPORAL PROPERTIES OF THE SHORT-RANGE PROCESS IN APPARENT MOTION [J].
BAKER, CL ;
BRADDICK, OJ .
PERCEPTION, 1985, 14 (02) :181-192
[6]   SMOOTH AND SAMPLED MOTION [J].
BURR, DC ;
ROSS, J ;
MORRONE, MC .
VISION RESEARCH, 1986, 26 (04) :643-652
[7]   TEMPORAL SUMMATION OF MOVING IMAGES BY THE HUMAN VISUAL-SYSTEM [J].
BURR, DC .
PROCEEDINGS OF THE ROYAL SOCIETY SERIES B-BIOLOGICAL SCIENCES, 1981, 211 (1184) :321-339
[8]   SUMMATION AND DIVISION BY NEURONS IN PRIMATE VISUAL-CORTEX [J].
CARANDINI, M ;
HEEGER, DJ .
SCIENCE, 1994, 264 (5163) :1333-1336
[9]   DIRECTIONALLY SELECTIVE COMPLEX CELLS AND THE COMPUTATION OF MOTION ENERGY IN CAT VISUAL-CORTEX [J].
EMERSON, RC ;
BERGEN, JR ;
ADELSON, EH .
VISION RESEARCH, 1992, 32 (02) :203-218
[10]   SPATIOTEMPORAL CHARACTERISTICS OF HUMAN MOTION PERCEPTION [J].
FREDERICKSEN, RE ;
VERSTRATEN, FAJ ;
VANDEGRIND, WA .
VISION RESEARCH, 1993, 33 (09) :1193-1205