One classic piece of evidence for an efference copy signal of eye position is that a small, positive afterimage viewed in darkness is perceived to move with the eye. When a small stationary reference point is visible the afterimage appears to move relative to the reference point. However, this is true only when the afterimage is localized to a small area. We have observed that when an extended ...

A computational study of line-focus generation was done using a self-written ray-tracing code and compared to experimental data. Two line-focusing geometries were compared, i.e., either exploiting the sagittal astigmatism of a tilted spherical mirror or using the spherical aberration of an off-axis-illuminated spherical mirror. Line focusing by means of astigmatism or spherical aberration showe...

In this paper, we propose the wireframe representation of nD object, which is a single 2D line drawing. A wireframe model of an nD object is composed of a set of edges connecting a set of vertices, a subset of closed r-chains called boundary r-chains which surround the (r + 1)D pieces of the object, and a set of filling patterns for the boundary r-chains for 0 < r < n. The wireframe representat...

Despite much interest in Simultaneous Localization and Mapping (SLAM), there is a lack of efficient methods for representing and processing their large scale point clouds. In this paper, we propose to simplify the point clouds generated by the semi-dense SLAM using three-dimensional (3D) line segments. Specifically, we present a novel incremental approach for 3D line segments extraction. This a...

This paper outlines a strategy for representing and localising rigid three dimensional objects in images using edge data. A probabilistic metric combining edge strength and corresponding orientation information is developed to support this process. A process of lateral feature shifting in the image plane is presented to quantitatively account for a range of modelling/ illumination dependencies....

During the last decade markerless motion capture techniques have gained an increasing interest in the biomechanics community. In the clinical field, however, the application of markerless techniques is still debated. This is mainly due to a limited number of papers dedicated to the comparison with the state of the art of marker based motion capture, in term of repeatability of the three dimensi...

The direct access model of hemispheric asymmetry was tested in a letter reflection (normal of reflected) judgement task. In the baseline condition letters were presented in their upright orientation, and reaction times were faster to letters presented in the right visual field than to those presented in the left visual field. In two other conditions the slides, and thus the letters, were rotate...

1. INTRODUCTION Video sequences usually contain a large overlap between successive frames, and regions in the scene are sampled in several images. This multiple sampling can sometime be used to achieve images with a higher spatial resolution. The process of reconstructing a high resolution image from several images covering the same region in the world is called Super Resolution. Additional tas...

The perceived motion of a vertical sine-wave luminance grating which undergoes an abrupt 180 deg phase shift (motion step) is ambiguous. The grating sometimes appears to move rightward; sometimes leftward. However, when the 180 deg step follows closely upon an unambiguous grating step, the 180 deg step appears to be in the same direction as the unambiguous step. This phenomenon is termed visual...

In a series of nine experiments, observers were required to identify the shapes of moving targets, and to discriminate regions of motion from regions of uncorrelated noise. Maximum displacement thresholds (Dmax) for performing these tasks were obtained under a wide variety of conditions. The stimulus parameters manipulated included the number of distinct frames in the motion sequences, the stim...