1. An input device comprising: a display; a plurality of sensor electrodes configured to detect an input object in a sensing region of said input device, wherein said sensing region overlaps said display; and a processing system coupled with said plurality of sensor electrodes, said processing system configured for: acquiring a capacitive image from said plurality of sensor electrodes; and correlating a part of said capacitive image with at least one input object template image to determine a type of an input object interacting with said input device.