for providing the VR{models used in this experiments. The authors thank Pavel Zahorik for comments and suggestions on an earlier draft of this manuscript. We are grateful to Scott Yu for providing the 3D model of our virtual environments lab shown in Fig. 1. Abstract. We have investigated the role of geographical slant in simple navigation and spatial memory tasks, using a computer graphics tow...

We have investigated the role of geographical slant in simple navigation and spatial memory tasks, using a computer graphics town called \Hexatown" (Gillner & Mallot 1998). This environment was a hexagonal grid of streets with landmarks placed in each angle between two streets. The whole environment could be slanted by an angle of 4 . Three slant conditions were used: at: no slant; slanted NW: ...

In order to improve the accuracy of multi-projection correction fusion, a method based on binocular vision is proposed. To date, most existing methods are single-camera mode, which may lose depth information display wall and not accurately obtain details geometric structure wall. The proposed uses camera build high-precision 3D model; thus, there no need know specific CAD size in advance. Meanw...

Projection-based visual display systems are expected to be effective platforms for VR applications, in which the displayed images are generated by computer graphics using three-dimensional models of virtual worlds. However, these kinds of visual displays, as well as other kinds of fixed-screen-based displays such as various head-tracked displays (HTD) and conventional CRT displays, have not bee...

Perspective projection is a well-understood aspect of 3D graphics. It is not something that 3D programmers spend much time thinking about. Most OpenGL applications simply select a field of view, specify near and far clipping plane distances, and call gluPerspective or glFrustum. These functions suffice in the vast majority of cases. But there are a few assumptions implicit in these. gluPerspect...

In a typical auto-stereoscopic three-dimensional display, the parallax barrier or lenticular lens is located in front of the display device. However, in a projection-type auto-stereoscopic display, such optical components make it difficult to display elemental images on the screen or to reconstruct a three-dimensional image, even though a projection-type display has many advantages. Therefore, ...

Mapping a texture image onto a flat spatial surface and subsequently projecting the image into screen space (such as a computer display) by a central projection results in a fractional linear transformation. Hence the inverse texture map is fractional linear as well. The divisions involved in this inverse can be prohibitively expensive for real time applications. This paper presents a method th...

The achievements in pervasive and nomadic computing, today, allow us to take and use our mobile devices such as smartphones and tablets everywhere we go. However, the mobility came at a cost: the small screen space of mobile devices leads to a deficient Human-ComputerInteraction (HCI) across several aspects, ranging from missing overview and awareness about the own digital information flow, to ...

Head-mounted projection display (HMPD) technology, as an alternative to conventional head mounted displays (HMD), offers the potential of designing wide field-of-view (FOV) optical see-through HMDs. Due to multiple passes through a beamsplitter, however, existing HMPD designs suffer from low luminance efficiency and thus the displayed image is lack of brightness and contrast. The design of a po...