expansion and contraction

Regan, D. and Beverly, K. I. (1978). Looming detectors in the human visual pathway.
Vision Research, 18, 415-421.
pdf


D. Regan, and A. Vincent (1995)
Visual processing of looming and time to contact throughout the visual field
Vision Research
Volume 35, Issue 13, July 1995, Pages 1845-1857
Science Direct


Psicológica (2005), 26, 139-146.
Reaction time asymmetries between expansion and contraction
Joan López-Moliner
http://www.uv.es/revispsi/articulos1.05/9-LOPEZMOLINER.pdf

Optic flow and depth perception

Optic flow and depth perception.
Simpson, William A.
Spatial Vision, Vol 7(1), Mar, 1993. pp. 35-75.
http://www.ingentaconnect.com/content/vsp/spv/1993/00000007/00000001/art00003

Provides background for the field of depth perception through motion (DPTM).
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(2) surface slant, tilt, and curvature may be recovered through the 1st and 2nd spatial derivatives of retinal velocities;
(3) retinal velocities are not the only possible input to the DPTM process;
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(6) the problem of segmenting flows arising from multiple moving objects is almost untreated in the psychophysical literature;
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