We present magnetic fingerprints; an input technique for mobile touchscreen devices that uses a s... more We present magnetic fingerprints; an input technique for mobile touchscreen devices that uses a small magnet attached to a user's fingernail in order to differentiate between a normal touch and a magnetic touch. The polarity of the magnet can be used to create different magnetic fingerprints where this technique takes advantage of the rich vocabulary offered by the use of multitouch input. User studies investigate the accuracy of magnetic fingerprint recognition in relation to magnet size, number of magnetic fingerprints used; and size of the touchscreen. Studies found our technique to be limited to using up to two fingerprints non-simultaneously, while achieving a high classification accuracy (95%) but it nearly triples the number of distinguishable multi touch events. Potential useful applications of this technique are presented.
Simulation of a visual impairment may lead to a better understanding of how individuals with visu... more Simulation of a visual impairment may lead to a better understanding of how individuals with visual impairments perceive the world around them and could be a useful design tool for interface designers to identify accessibility barriers. Current simulation tools, however, suffer from a number of limitations, pertaining cost, accuracy and immersion. We present a simulation tool (SIMVIZ) that mounts a wide angle camera on a head-mounted display to create a see-through stereoscopic display that simulates various types and levels of visual impairments. A qualitative user study evaluates the immersiveness, usability and effectiveness of SIMVIZ versus using a smartphone based simulator. SIMVIZ enables quick accessibility inspections during iterative software development.
We present magnetic fingerprints; an input technique for mobile touchscreen devices that uses a s... more We present magnetic fingerprints; an input technique for mobile touchscreen devices that uses a small magnet attached to a user's fingernail in order to differentiate between a normal touch and a magnetic touch. The polarity of the magnet can be used to create different magnetic fingerprints where this technique takes advantage of the rich vocabulary offered by the use of multitouch input. User studies investigate the accuracy of magnetic fingerprint recognition in relation to magnet size, number of magnetic fingerprints used; and size of the touchscreen. Studies found our technique to be limited to using up to two fingerprints non-simultaneously, while achieving a high classification accuracy (95%) but it nearly triples the number of distinguishable multi touch events. Potential useful applications of this technique are presented.
Simulation of a visual impairment may lead to a better understanding of how individuals with visu... more Simulation of a visual impairment may lead to a better understanding of how individuals with visual impairments perceive the world around them and could be a useful design tool for interface designers to identify accessibility barriers. Current simulation tools, however, suffer from a number of limitations, pertaining cost, accuracy and immersion. We present a simulation tool (SIMVIZ) that mounts a wide angle camera on a head-mounted display to create a see-through stereoscopic display that simulates various types and levels of visual impairments. A qualitative user study evaluates the immersiveness, usability and effectiveness of SIMVIZ versus using a smartphone based simulator. SIMVIZ enables quick accessibility inspections during iterative software development.
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