Hierarchical motion structure is employed by humans during visual perception

Optimizing Visual Motion Perception during Eye Movements

We usually perceive a stationary, stable world and we are able to correctly estimate the direction of heading from optic flow despite coherent visual motion induced by eye movements. This astonishing example of perceptual invariance results from a comparison of visual information with internal reference signals predicting the visual consequences of an eye movement. Here we demonstrate that the ...

Perception of Visual Motion

Visual motion perception.

The primate visual motion system performs numerous functions essential for survival in a dynamic visual world. Prominent among these functions is the ability to recover and represent the trajectories of objects in a form that facilitates behavioral responses to those movements. The first step toward this goal, which consists of detecting the displacement of retinal image features, has been stud...

Visual Working Memory Contents Bias Ambiguous Structure from Motion Perception

The way we perceive the visual world depends crucially on the state of the observer. In the present study we show that what we are holding in working memory (WM) can bias the way we perceive ambiguous structure from motion stimuli. Holding in memory the percept of an unambiguously rotating sphere influenced the perceived direction of motion of an ambiguously rotating sphere presented shortly th...

Hierarchical visual perception without calibration

We have analyzed the equations and the formalism which allow to achieve dynamic visual perception of geometric and kinematic 3D information, for a monocular visual system without calibration. Considering the emergence of active visual systems for which we can not consider that the calibration parameters are either known or xed, we develop an alternative strategy based on the two complementary f...