公开(公告)号：US20170277293A1

公开(公告)日：2017-09-28

申请号：US15083184

申请日：2016-03-28

Applicant: SYNAPTICS INCORPORATED

Inventor： Yi LING ,  Sanjay MANI

IPC: G06F3/044 ,  G06F3/041

CPC classification number: G06F3/044 ,  G06F3/0416 ,  G06F3/0418

Abstract: Embodiments described herein include a method for using multiple filtered images. The method includes acquiring changes of capacitance in a sensing region at a plurality of sensor electrodes in a capacitive sensor. The method also includes generating a capacitive frame based on the changes of capacitance and calculating one or more filtered capacitive frames by modifying the capacitive frame with a spatial filter. The method also includes performing clump detection on the one or more filtered capacitive frames, where clump detection includes detecting locations in each filtered capacitive frame exceeding a first threshold near locations that exceed a second threshold in the corresponding capacitive frame.