smagt@fwi.uva.nl (Patrick van der Smagt) (05/18/91)
I am trying to model motion in a quite wide perspective, but one can narrow it down to hand-eye coordination. When I look at biological mechanisms (e.g., myself), I get the impression that motions are based on the fact that one assumes all moving objects (including onself) to have a constant velocity. Correction for the fact that things have accelerations are realised by fast sensory data processing. Another indication for this assumption I find in Lee's article [1980] in which he invesigates time-to-contact. He reports (in another article, I believe) that subjects correctly estimate the time left before an approaching object hits them, under the assumption that the velocity of the object is constant. What I am looking for are other indications for my assumption. Do biological systems only `calculate' the first positional derivative from their sensory input? Patrick van der Smagt References: =========== D. N. Lee, The optic flow field: The foundation of vision. Phil. Trans. R. Soc. Lond. B 290, pp. 169--179, 1980.