A dozen people who cannot speak and have very limited voluntary muscle control because of cerebral palsy or traumatic brain injury have tried using a new technology called the Camera Mouse to access the computer. Nine of the people were successful, in many cases being able to spell words or run commercial software or access the internet for the first time. The Camera Mouse is non-invasive and u...

We explore the capabilities of an inexpensive obstacle detection system consisting of a CCD color sensor, synchronously pulsed laser fan and supporting hardware and software. The novelty is the extreme simplicity of building such a system with commodity hardware, achieving a tiny form factor, low power operation and low cost. The camera, laser fan and supporting software constitute an active se...

In this paper we face the problem of positioning a camera attached to the endeffector of a robotic manipulator so that it gets parallel to a planar object. Such problem, so-called plane-to-plane positioning, has been treated for a long time in visual servoing. Our approach is based on linking to the camera a structured light emitter composed of four parallel laser pointers so that its distribut...

Cameras are excellent sensors in robotic systems. However, a camera being extreme sensitive to illumination variation restricts its capability. In this paper, color image segmentation of a camera influenced by varying light illumination is studied for extending camera’s capability in the future. The influence of an image captured by camera due to varying light illumination is analyzed. The comp...

conclusions in lighting conditions, most of t-res was isomerized to the other isomer cis-resveratrol. t-res is unstable in alkali ph and when exposed to light. t-res was quite stable at other conditions, and several freeze-thaw cycles did not have any effect on its stability. results our findings revealed that t-res was quite stable in different temperatures ranging from -70 °c to 25 °c, and ac...

Generating content for third person games and machinima requires knowledge in cinematography (camera placement, framing, lighting) and editing (cutting between cameras). In existing systems, such knowledge either comes from the final user (machinima) or from a database of precompiled solutions (third person games). In this paper, we present a system that can make decisions about editing and aut...

This paper describes our work on practical global vision systems (DORAEMON and ERGO). These vision systems have formed the basis of several undergraduate and graduate courses since 1998 and have consistently been improved to perform accurately and robustly over a wide range of applications. DORAEMON uses a sophisticated camera calibration method and colour model to remove the need for an overhe...

This paper discusses a computer vision based approach for enhancing a physical environment with machine perception. Using techniques for assessing the distance and orientation of a target from the camera, we detect user presence and estimate whether an object of interest is the focus of attention of the user. Our solution uses low-cost cameras and is designed to be robust to lighting variations...