| abstract |
An electronic device with a two-dimensional capacitance sensing area, a camera, one or more processors and memory detects a predefined capacitance distribution of an object that is placed on or near the two-dimensional capacitance sensing area. The object includes a predefined visual pattern on the object. The device, in response to detecting the predefined capacitance distribution of the object that is placed on or near the two-dimensional capacitance sensing area, performs a first predefined operation in accordance with first information encoded by the predefined capacitance distribution of the object. The device detects the predefined visual pattern on the object using the camera, and performs the first predefined operation in accordance with second information encoded in the predefined visual pattern detected using the camera. |