ABSTRACT This technical report presents an innovative interaction technique for simultaneously scrolling the content of a window in horizontal and vertical dimensions. Scrolling is controlled by head rotation via a non-intrusive computer vision system. Preliminary user studies show that this technique is easy to learn and provides substantial speed and accuracy advantages over scrollbar manipul...

A NEURAL network in which there is excitatory and inhibitory interaction among neighboring units has been proposed as a model of human pattern vision and used, with some success, to explain such phenomena as the appearance of Mach bands and contrast sensitivity with periodic patterns (B&&Y, 1960 and RATLWF, 1965, for example). The network’s response is a two-dimensional transformation of the st...

This paper introduces a depth-computation architecture designed for, but not limited to, a single-chip current mode analog VLSI (aVLSI) implementation of stereo vision. The architecture implements a modified version of the block matching algorithm; pixel blocks are averaged (summed) vertically before comparison along the horizontal axis. This both reduces the effects of noise and provides an or...

OBJECTIVES To study the relationship between the major horizontal and minor torsional components of congenital nystagmus to elucidate the diagnostic importance, effects on vision, and pathogenetic implications of the torsional components. METHODS We recorded the eye movements of 13 subjects with congenital nystagmus using a three-dimensional magnetic search coil technique over a 15-year perio...

The idea of Fixation introduced a direct method for general recovery of shape and motion from images without using either feature correspondence or optical flow [1,2]. There are some parameters which have important effects on the performance of fixation method. However, the theory of fixation does not say anything about the autonomous and correct choice of those parameters. This paper presents ...

Our goal is to link spatial and temporal properties of letter recognition to reading speed for text viewed centrally or in peripheral vision. We propose that the size of the visual span - the number of letters recognizable in a glance - imposes a fundamental limit on reading speed, and that shrinkage of the visual span in peripheral vision accounts for slower peripheral reading. In Experiment 1...

To avoid collisions when navigating through cluttered environments, flying insects must control their flight so that their sensory systems have time to detect obstacles and avoid them. To do this, day-active insects rely primarily on the pattern of apparent motion generated on the retina during flight (optic flow). However, many flying insects are active at night, when obtaining reliable visual...

Reconstruction of 3D scenes with abundant straight line features has many applications in computer vision and robot navigation. Most approaches to this problem involve stereo techniques, in which a solution to the correspondence problem between at least two different images is required. In contrast, 3D reconstruction of straight horizontal lines from a single 2D omni-directional image is studie...

PURPOSE To study the responses of horizontal cells and rod bipolar cells, the second-order neurons in the retina, to the degeneration induced by experimental retinal detachment. METHODS Retinas from the eyes of domestic cats were examined 1, 3, 7, and 28 days after detachment using immunocytochemical and electron microscopic analyses. Retinal sections were labeled with antibodies to synaptoph...