MagnaSense: The Flying Mouse
05 Jan 2021-pp 158-160
TL;DR: MagnaSense as discussed by the authors is a wireless computer mouse that uses two magnetometers and principles from magnetism and electromagnetic induction to achieve performance comparable to a traditional computer mouse, but with three degrees of freedom instead of two.
Abstract: This paper presents MagnaSense, the first of its kind wireless computer ‘mouse’ that uses two magnetometers, and principles from magnetism and electromagnetic induction to achieve performance comparable to a traditional computer ‘mouse’, but with three degrees of freedom instead of two. We demonstrate MagnaSense to have the ability to draw various shapes as well as write text on the screen. Our prototype of MagnaSense is affordable, non-intrusive, handy and easy to use, with the user just requiring a magnet in his hand.
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05 Nov 2008
TL;DR: Nericell is presented, a system that performs rich sensing by piggybacking on smartphones that users carry with them in normal course, and addresses several challenges including virtually reorienting the accelerometer on a phone that is at an arbitrary orientation, and performing honk detection and localization in an energy efficient manner.
Abstract: We consider the problem of monitoring road and traffic conditions in a city. Prior work in this area has required the deployment of dedicated sensors on vehicles and/or on the roadside, or the tracking of mobile phones by service providers. Furthermore, prior work has largely focused on the developed world, with its relatively simple traffic flow patterns. In fact, traffic flow in cities of the developing regions, which comprise much of the world, tends to be much more complex owing to varied road conditions (e.g., potholed roads), chaotic traffic (e.g., a lot of braking and honking), and a heterogeneous mix of vehicles (2-wheelers, 3-wheelers, cars, buses, etc.).To monitor road and traffic conditions in such a setting, we present Nericell, a system that performs rich sensing by piggybacking on smartphones that users carry with them in normal course. In this paper, we focus specifically on the sensing component, which uses the accelerometer, microphone, GSM radio, and/or GPS sensors in these phones to detect potholes, bumps, braking, and honking. Nericell addresses several challenges including virtually reorienting the accelerometer on a phone that is at an arbitrary orientation, and performing honk detection and localization in an energy efficient manner. We also touch upon the idea of triggered sensing, where dissimilar sensors are used in tandem to conserve energy. We evaluate the effectiveness of the sensing functions in Nericell based on experiments conducted on the roads of Bangalore, with promising results.
1,407 citations
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TL;DR: The "Camera Mouse" system tracks the computer user's movements with a video camera and translates them into the movements of the mouse pointer on the screen, and body features such as the tip of the user's nose or finger can be tracked.
Abstract: The "Camera Mouse" system has been developed to provide computer access for people with severe disabilities. The system tracks the computer user's movements with a video camera and translates them into the movements of the mouse pointer on the screen. Body features such as the tip of the user's nose or finger can be tracked. The visual tracking algorithm is based on cropping an online template of the tracked feature from the current image frame and testing where this template correlates in the subsequent frame. The location of the highest correlation is interpreted as the new location of the feature in the subsequent frame. Various body features are examined for tracking robustness and user convenience. A group of 20 people without disabilities tested the Camera Mouse and quickly learned how to use it to spell out messages or play games. Twelve people with severe cerebral palsy or traumatic brain injury have tried the system, nine of whom have shown success. They interacted with their environment by spelling out messages and exploring the Internet.
533 citations
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