Method to parameterize and recognize circular gestures on touch sensitive surfaces

摘要

A method to parameterize and recognize circular gestures on touch sensitive surfaces includes dividing the touch sensitive surface into four quadrants, detecting a transition from a first quadrant into a second quadrant, time-stamping and tracking each detected quadrant transition, and computing the time between quadrant transitions so that the circular speed and direction of the circular gestures on the touch sensitive surface can be detected. The detected direction can be either a clockwise or a counter-clockwise direction.

主权项

1. A method to parameterize and recognize circular gestures on touch sensitive surfaces comprising:
dividing the touch sensitive surface into four quadrants; detecting a transition from a first quadrant into a second quadrant; time-stamping and tracking each detected quadrant transition; computing the time between quadrant transitions so that the circular speed and direction of the circular gestures on the touch sensitive surface can be detected; and classification of the four quadrants; wherein each touch point (X, Y) across time is grouped in a respective quadrant depending on the changes in the current X and Y positions in a current touch frame with respect to a previous frame, wherein a tracking touch point is classified in Quadrant1 (Q1) when a current Y coordinate is less than a previous Y coordinate and a current X coordinate is greater than a previous X coordinate, wherein a tracking touch point is classified in Quadrant2 (Q2) when a current Y coordinate is greater than a previous Y coordinate and a current X coordinate is greater than a previous X coordinate, wherein a tracking touch point is classified in Quadrant3 (Q3) when a current Y coordinate is greater than a previous Y coordinate and a current X coordinate is less than a previous X coordinate, and wherein a tracking touch point is classified in Quadrant4 (Q4) when a current Y coordinate is less than a previous Y coordinate and a current X coordinate is less than a previous X coordinate.