Method and device for estimating touch pressure using image, recording medium for the same, and mobile device comprising the same

摘要

PURPOSE: An image based touch strength measuring method, an apparatus, and recording medium for the same are provided to measure touch strength without a touch strength sensor panel. CONSTITUTION: An apparatus obtains a plurality of frames of an external image through a camera. The apparatus senses touch through a touch sensor(S120). The apparatus calculates optical flow of frames(S150). The apparatus calculates the movement of a mobile device. The apparatus subtracts the movement of the mobile device from the calculated optical flow.