Eli Peli, MEMBER SPIE The Schepens Eye Research Institute 20 Staniford Street Boston, Massachusetts 02114-2500 E-mail: [email protected] Abstract. Foveated imaging systems applicable in various single-user displays mimic the visual system’s image structure, where resolution decreases gradually away from the fovea. The main benefit is the low average image resolution while maintaining h...

This paper describes a vision system with dual viewing angles, i.e., wide and narrow viewing angles, and a scheme of user-friendly speech dialogue environment based on this vision system. The wide viewing angle provides a wide viewing field for wide range motion tracking, and the narrow viewing angle is capable of following a target in wide viewing field to take the image of the target with a s...

Determining optical flow, the pattern of apparent motion of objects caused by the relative motion between observer and objects in the scene, is a fundamental problem in computer vision. Given two images, goal is to compute the 2D motion field a projection of 3D velocities of surface points onto the imaging surface. Optical flow can be used in a wide range of higher level computer vision tasks, ...

In the domain of computer vision, there exists a very wide application for the research of human motion capture. This paper proposes a new approach to do motion capture in video. It is composed of image sequence based tracking of human feature points and the reconstruction of threedimension(3D) motion skeleton. First, we track every part of human body from top to bottom on the basis of a human ...

This paper describes a method to construct a stationary environmental map and estimate the ego-motion of a mobile robot from unknown planar motion by using an omni-directional vision sensor. Most environments where mobile robot works are limited to two-dimensional space and the environmental map which is necessary for mobile robot navigation has also two dimensions. However, conventional “Struc...

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 ...

‎in this paper‎, ‎we present a novel approach for image selective smoothing by the evolution of two paired nonlinear‎ ‎partial differential equations‎. ‎the distribution coefficient in de-noising equation controls the speed of distribution‎, ‎and is‎ ‎determined by the edge-strength function‎. ‎in the previous works‎, ‎the edge-strength function depends on isotropic‎ ‎smoothing of the image‎, ‎...

The purpose of this study was to examine the hypothesis that higher stimulus velocities could be tolerated in amblyopic and normal peripheral vision. The basis for this hypothesis is that a shift in the spatial scale of processing appears to account for the degradation in vernier acuity for moving stimuli in normal vision, and, to a large degree for the degradation in vernier acuity for station...

Automatic detection of cow’s estrus is important in cattle management. This paper proposes a method of estrus detection by checking cattle mounting activity automatically. We use a video sensor and apply computer vision techniques to detect the mounting activity. Especially, we derive motion vectors in order to distinguish the mounting activity from other activities, based on computer vision te...

Image subtraction is used in many areas of machine vision to identify small changes between equivalent pairs of images. Often only a small subset of the differences will be of interest. In motion analysis only those differences caused by motion are important, and differences due to other sources only serve to complicate interpretation. Simple image subtraction detects all differences regardless...