Angular contact geometry

摘要

In embodiments of angular contact geometry, touch input sensor data is recognized as a touch input on a touch-screen display, such as a touch-screen display integrated in a mobile phone or portable computing device. A sensor map is generated from the touch input sensor data, and the sensor map represents the touch input. The sensor map can be generated as a two-dimensional array of elements that correlate to sensed contact from a touch input. An ellipse can then be determined that approximately encompasses elements of the sensor map, and the ellipse represents a contact shape of the touch input.

主权项

1. A method, comprising:
recognizing touch input sensor data as a touch input on a touch-screen display; generating a sensor map from the touch input sensor data, the sensor map representing the touch input; modeling the sensor map as a Gaussian distribution; determining an ellipse that approximately encompasses the sensor map from the Gaussian distribution, the ellipse representing a contact shape of the touch input; and validating the ellipse based on an inaccuracy ratio (IAR) of the ellipse, the IAR of the ellipse determined from one or more regions that are within the bounds of the ellipse, but are not part of the sensor map.