Fig. 2
From: Visual motion thresholds mapped to midget and parasol ganglion cell topography in the human retina
A. Four frames of a reverse-phi stimulus, where a square wave grating of duty cycle 0.25 has a simultaneous 45° phase shift and reversal of contrast on each frame. B. The cross-section of the reverse-phi grating in A. where the direction of feature displacement is indicated by the black arrow. C. Fourier analysis of the XT plane of a simulated 32 frame reverse-phi grating in A, where the pale blue peaks represent the frequency of the harmonic components. The positive diagonal (bottom-left to top-right) corresponds to the leftward motion of the frequency components in the image.
