The lack of image brightness is a common problem in optical see-through head-mounted displays (OST-HMD) where a beamsplitter is required to combine views from HMD image source and the direct-view of a real world scene. This problem is further aggregated in a headmounted projective display (HMPD) due to the fact that light passes through the beamsplitter multiple times. In this paper, we present...

it is very important to test and evaluate the performance and ability of new-design machinery in comparison with available ones. based on this, a tractor front-mounted rice reaper was compared and evaluated with tiller- mounted and self-propelled reapers. field experiments were conducted to determine forward speed, field capacity, harvesting losses, labor and costs. experiments were conducted b...

Head-mounted displays (HMDs) have the potential to overcome some of the technological limitations of currently existing automotive head-up displays (HUDs), such as the limited field of view and the restrictive boundaries of the windshield. However, in a formative study, we identified other, partially known problems with HMDs regarding content stability and occlusion. As a counter-measure we pro...

In this paper, we propose and design a new Head Mounted Display (HMD) that provides a large field of view with a high resolution insert. Previously, this type of HMDs has been designed using mechanical or sequential scanning devices. Our HMD uses only electronic devices that can be easily integrated with the optical components. We describe the design principles and envisioned applications of ou...

We built a video see-through head-mounted display with zero eye offset from commercial components and a mount fabricated via rapid prototyping. The orthoscopic HMD’s layout was created and optimized with a software simulator. We describe simulator and HMD design, we show the HMD in use and demonstrate zero parallax.

A correct spatial registration of Optical See-Through HeadMounted Displays (OST-HMD) w.r.t. a user’s eye(s) is an essential problem for any AR application using the such HMDs (Fig. 1). Maintaining the correct registration demands frequent (re)calibrations for the end-users whenever they move the HMD on their head. Thus, a calibration technique should be simple and accurate for the universal, lo...

This paper presents a novel observation system for immersive soccer match taken by multiple video cameras at a real stadium. The user sees the soccer field model in front of his/her eyes from the viewpoint through head-mounted display, while the images of players and a soccer ball are also rendered onto the display. For geometric registration between the soccer field model in the real world and...