Control of the spatial orientation of the hand is an important component of reaching and grasping movements. We studied the contribution of vision and proprioception to the perception and control of hand orientation in orientation-matching and letter-posting tasks. In the orientation-matching task, subjects aligned a "match" handle to a "target" handle that was fixed in different orientations. ...

Researchers in image processing have long recognized the importance of modeling the human observer. Although a full human vision model remains elusive, orientation detection , one of the key components of human vision, can be directly incorporated into a variety of image processing algorithms. Orientation detection also provides cues that allow an algorithm to adapt to inhomogeneities in images...

While many computer vision algorithms can be used to determine surface orientation information, most require extensive processing (e.g. texture based method). In this paper we demonstrate that under xation, the ratio of angular disparity measures and knowledge of eye position can be used to obtain an estimate of surface orientation. A sensitivity analysis based on accuracy of eye position contr...

BACKGROUND Inherited retinal degenerations (IRDs) preferentially affecting cone photoreceptor function are being considered for treatment trials aiming to improve day vision. The purpose of the current work was to develop cone-specific visual orientation outcomes that can differentiate day vision improvement in the presence of retained night vision. METHODS A lighted wall (1.4 m wide, 2 m hig...

A new multiple orientation event-based neurobiological recognition system is proposed by integrating recognition and tracking function in this paper, which is used for asynchronous address-event representation (AER) image sensors. The characteristic of this system has been enriched to recognize the objects in multiple orientations with only training samples moving in a single orientation. The s...

The perceived orientation of a Gabor-patch contour is determined, in part, by shifts in carrier phase between the patches [Popple, A. V. & Sagi, D., 2000. A Fraser illusion without local cues? Vision Research, 40, 873-878; Popple, A. V. & Levi, D. M., 2000a. A new illusion demonstrates long-range processing. Vision Research, 40, 2545-2549; Popple, A. V. & Levi, D. M., 2000b. Amblyopes see true ...