The UnMousePad: an interpolating multi-touch force-sensing input pad
ACM SIGGRAPH 2009 papers
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This work presents GaussSketch, a retrofit stylus sensing extension to enable the detection of stylus tilt and pressure for natural sketch simulation on smartphones by utilizing magnetism. Attaching the compatible sensor grid on the back of a conventional smartphone can (1) sense the stylus' tilt degrees and pressure values, (2) discriminate the touch events generated by a finger or the stylus, and (3) detect where the stylus hovers upon the screen.