From: Bilocal visual noise as a probe of wide field motion computation
Journal of Vision. 2016;16(7):8. doi:10.1167/16.7.8
Figure Legend:
Space-time correlation function of the apparent motion stimuli used in this study. (A) Idealized condition, with delta
correlation in both space and time, plotted for one space dimension, namely X. The vertical red lines located at (Δt, Δx)
and (−Δt, −Δx) represent nonzero motion energy and the vertical blue line located at (0, 0) represents nonzero flicker
energy. The flicker energy is twice the motion energy for the condition m 1 = m2. The four quadrants of the energy space
are denoted by I, II, III, and IV. (B) Motion energy is negative for the condition m 1 = −m2. (C, D) In practice, patterns are
displayed for a finite time Tp, which in our experiments is an integer multiple of the 2 ms frame time. For most
experiments
a longer
value of Tp is used,
typically a for
fewResearch
frame intervals,
this is matched
better
to theAllintegration
Date
of download:
7/28/2017
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time of fly photoreceptors. The example in (C) shows the triangular profile of the autocorrelation function Λ(t) (see