Knowing where we're heading--when nothing moves.

A model for simultaneous computation of heading and depth in the presence of rotations

When an observer moves through the world, the motions of images on the retina provide information about the direction of observer motion, or "heading", and about the relative distance to surfaces in the scene. While it is simple to compute these quantities when the observer moves in a straight line, the computation becomes substantially more difficult when the observer also undergoes a rotation...

Where is Patient Safety Research and Practice Heading? A Response to Recent Commentaries

Computational analyses for illusory transformations in the optic flow field and heading perception in the presence of moving objects

When we see a stimulus of a radial flow field (the target flow) overlapped with a lateral flow field or another radial flow field, the focus of expansion (FOE) of the target radial flow appears to be shifted in a direction. Royden and Conti [(2003). A model using MT-like motion-opponent operators explains an illusory transformation in the optic flow field. Vision Research, 43, 2811-2826] argued...

Metaprogramming Forced Moves

1 LIP6, Université Pierre et Marie Curie, 4 Place Jussieu, 75252 Paris Cedex 05, France. [email protected] Abstract. Knowledge about forced moves enables to select a small number of moves from the set of possible moves. It is very important in complex domains where search trees have a large branching factor. Knowing forced moves drastically cuts the search trees. We propose a language an...

To Tilt Your Head or Not To: Potentially

In this paper we study the human head movement, when the head shifts its orientation between two possible heading directions, as a simple mechanical control system. Head movements obey Donders’ constraint (as opposed to the Listing’s constraint for eye movement), which states that the allowed orientations of the head are obtained by rotating a fixed ‘primary heading direction’ by a subclass of ...