FingerIO Tracking (IMAGE) University of Washington Caption In user testing with off-the-shelf smartphones, the finger location computed by FingerIO (in green) was accurate to within 8mm of the actual motion recorded on a separate touchscreen (shown in black). Credit University of Washington Usage Restrictions With credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.