Keywords: tactile array antialisaing

We investigate rendering methods for 2D tactile
arrays. We present four rendering methods, two of
which are anti-aliased methods to improve display
quality and smoothness. We describe three
experiments to evaluate the methods. The first
experiment compares them based on subjective
ratings and finds that anti-aliased methods improve
perceived quality and smoothness. The second
experiment investigates the potential for one
approach to communicate information at a sub-tactor
resolution, based on the shortest line segment
allowing identification of its direction. The third
experiment is a shape discrimination experiment and
finds that only one of the approaches allows
reasonable discrimination for the selected shapes.