While there is a considerable history of work on visual texture, the definition of texture is still imprecise. However, it is generally agreed that a texture is spatially homogeneous and contains repeated visual patterns. In synthetic textures, such as horizontal lines, vertical lines or a checkerboard, the basic structure is repeated exactly. In natural textures, such as grass, wood, sand or r...

In this paper, we present an efficient lane detection and tracking algorithm for wide-baseline stereo vision systems with cameras mounted on the host vehicle. The main purposes of the vision system are host vehicle localization and lane shape recognition for advanced driver assistance tasks on highways and country roads with visible lane boundary markings. This is achieved via the 3D geometrica...

A patient with right sided brain damage suffered contralesional neglect, inferior quadrantanopia (with 0 degrees sparing in the left eye and 13 degrees sparing in the right), and a visual field restriction (to 15 degrees ) in the upper contralesional quadrant of the left eye. In binocular vision, the patient showed underestimation of the horizontal size of contralesional line segments unless cu...

In this paper a multisensor setup for localization consisting of a 360 degree laser range finder and a monocular vision system is presented. Its practicability under conditions of continuous localization during motion in real-time (referred to as on-the-fly localization) is investigated in largescale experiments. The features in use are infinite horizontal lines for the laser and vertical lines...

As computer performance and graphics hardware continue to improve, the gamer is increasingly being presented with richer and more realistic visual environments. Viewing these virtual environments is generally still based upon display technology that does not exploit two very important characteristics of our visual system, namely stereoscopic vision that is responsible for the enhanced depth per...

Polarisation vision is used by a variety of species in many important tasks, including navigation and orientation (e.g. desert ant), communication and signalling (e.g. stomatopod crustaceans), and as a possible substitute for colour vision (e.g. cephalopod molluscs). Fiddler crabs are thought to possess the anatomical structures necessary to detect polarised light, and occupy environments rich ...

An analysis of response latencies shows that when an image is presented to the visual system, neuronal activity is rapidly routed to a large number of visual areas. However, the activity of cortical neurons is not determined by this feedforward sweep alone. Horizontal connections within areas, and higher areas providing feedback, result in dynamic changes in tuning. The differences between feed...

Cone photoreceptors carry out phototransduction in daylight conditions and provide the critical first step in color vision. Despite their importance, little is known about the developmental mechanisms involved in their generation, particularly how they are determined relative to rod photoreceptors, the cells that initiate vision in dim light. Here, we report the identification of a cis-regulato...

In the paper, a novel new gravity-constrained (GC) three-wire-driven (TWD) parallel robot is proposed, and the prototype is presented with control system. With its mechanism model, three typical kinematic analytical models, including horizontal up-down motion, pitching motion and heeling motion and their corresponding simulations are given in detail. The open-loop and close-loop control scheme ...

Bombus terrestris is one of the most commonly used insect models to investigate visually guided behavior and spatial vision in particular. Two fundamental measures of spatial vision are spatial resolution and contrast sensitivity. In this study, we report the threshold of spatial resolution in B. terrestris and characterize the contrast sensitivity function of the bumblebee visual system for a ...