This paper presents initial results from an ongoing work to calibrate optical see-through head-mounted displays (HMDs). We have developed a method to calibrate stereoscopic optical see-through HMDs based on the 3D alignment of a target in the physical world with a virtual object in user’s view. This is an extension of the Single Point Active Alignment Method (SPAAM) [28] developed for monocular...

soil compaction is an important aspect of agriculture and different methods are available to measure this parameter. one method is called the cone index; measuring the force required per unit area for penetration of a standard steel cone into the ground. cone penetrometers are used for cone index measurement. in this study, a tractor mounted, hydraulically-operated penetrometer was designed, bu...

Real-time three-dimensional (3D) interactive displays refer to display devices servo to the line of sight of a user, allowing not only free head motion, but also potentially and importantly full body mobility. Ideally, one could wish for such capability to exist without the need to wear any view-aided device. However, unless a display system could be created in space, anywhere and anytime, a si...

Real-time three-dimensional (3D) interactive displays refer to display devices servo to the line of sight of a user, allowing not only free head motion, but also potentially and importantly full body mobility. Ideally, one could wish for such capability to exist without the need to wear any viewaided device. However, unless a display system could be created in space, anywhere and anytime, a sim...

Within the context of tele-presence and immersion for piloting light aircraft, knowledge about the surrounding wind offers useful information for piloting purposes. Rendering wind in virtual simulation or telepresence application has been used still the early sixties [1] to enhance immersion. However since then it has been rather limited to use a fan in front of the user to produce an illusion ...