A video signal should use as many bits (gray levels) as possible, to obtain sufficient amplitude resolution for high quality images. However, (digital) displays use a limited number of bits. We propose a modification to the error diffusion algorithm that enables a decrease in the number of bits, without a decrease in luminance accuracy.

The concept of Augmented Reality (AR) displays is defined, in relation to the amount of real (unmodelled) and virtual (modelled) data presented in an image, as those displays in which real images, such as video, are enhanced with computer generated graphics. For the important class of stereoscopic AR displays, several factors may cause potential perceptual ambiguities, however, which manifest t...

Illumination of only a few key points on a moving human body or face is enough to convey a compelling perception of human motion. A full understanding of the perception of biological motion from point-light displays requires accurate comparison with the perception of motion in normal, fully illuminated versions of the same images. Traditionally, these two types of stimuli (point-light and fully...

To support the perceptually rich and informationabundant user interfaces of the future, displays must be larger with much higher resolution. With such displays, the worrisome flood of information can be turned into a productive river of knowledge. Windows with 40-60 icons or scrolling lists with 20-40 items are inadequate for dealing with the complex tasks that users increasingly face. Advancin...

This study examined the perception of linguistic prosody from augmented point-light displays that were derived from motion tracking six talkers producing different prosodic contrasts. In Experiment 1, we determined perceivers’ ability to use these abstract visual displays to match prosody across modalities (audio to video), when the non-matching visual display was segmentally identical and diff...

Hypervideo is a form of interactive video that allows users to follow links to other video. A simple form of hypervideo, called “detail-on-demand video,” provides at most one link from one segment of video to another, supporting a singlebutton interaction. Detail-on-demand video is well suited for interactive video summaries, because the user can request a more detailed summary while watching t...

Background: The prevalence of chronic pains in the elderly residing in nursing homes is high, which can bring about social isolation, depression, incidence of disabilities, as well as increased costs. Given the risks, medication therapy is not used for the elderly, and non-pharmaceutical methods, such as humor therapy as one of the complementary medicine techniques using thought distraction, ha...

There is evidence that nonpictorial distance cues, including accommodation and binocular disparity, play at most a minor role in driving relative to pictorial cues, such as relative size and linear perspective. However, the possibility that nonpictorial cues play a nontrivial role in at least some driving situations is of interest because of current and proposed applications of camerabased disp...

Augmented reality (AR) is a technology in which a user’s view of the real world is enhanced or augmented with additional information generated from a computer model. In order to have a working AR system, the see-through display system must be calibrated so that the graphics is properly rendered. The optical see-through systems present an additional challenge because, unlike the video see-throug...