Patent ID: 9170729
Filing Date: 2015-10-27
Classification: G06F

Abstract:
1. A method of controlling a touch-surface control device comprising recognizing a shape of a control trajectory on a touch surface from among at least two predefined trajectory shapes, wherein shape recognition comprises, in the course of a predetermined duration: sampling the control trajectory to determine a sampled angle of the control trajectory for each sampling period; comparing a parameter representative of the evolution of at least two sampled angles with a predetermined threshold, wherein the representative parameter is a standard deviation of the sampled angles with respect to a mean of the sampled angles; assigning a predefined trajectory shape to the control trajectory as a function of a result of the comparison; determining a length of displacement of the control trajectory; comparing the length of displacement of the control trajectory with a predetermined distance; and assigning a stationary trajectory to the control trajectory if the length of displacement of the control trajectory is less than the predetermined distance, wherein a circular trajectory is assigned to the control trajectory when said representative parameter is greater than the predetermined threshold, and wherein a rectilinear trajectory is assigned to the control trajectory when said parameter is less than or equal to said threshold, wherein the circular or rectilinear trajectories allow parametrization of a control.