System and method for determining user input from occluded objects

An input device comprising:

• a plurality of capacitive sensor electrodes configured to sense in a sensing region;
• and
• a processing system coupled to the plurality of capacitive sensor electrodes, the processing system configured to:
• determine if a sensed object includes an occluded portion using an image representative of sensor values
• determine a portion of the image corresponding to the sensed object;
• determine when the sensed object includes the occluded portion based at least in part on a number of sensor values corresponding to both the sensed object and a second sensed object proximate to the sensed object;
• generate a boundary representation of the sensed object which approximates a contact area corresponding to the sensed object, wherein the boundary representation encompasses at least part of the occluded portion of the sensed object and at least part of a non-occluded portion of the sensed object when the sensed object includes the occluded portion;
• and
• provide an output indicative of the sensed object, the output based at least in part on the boundary representation.

A method for responding to user input detected by an input device having a plurality of sensor electrodes and configured to sense objects in a sensing region, the method comprising:

• determining if a sensed object includes an occluded portion using an image representative of sensor values;
• determining a portion of the image corresponding to the sensed object;
• determining when the sensed object includes the occluded portion is based at least in part on a number of sensor values corresponding to both the sensed object and a second sensed object proximate to the sensed object;
• generating a boundary representation of the sensed object which approximates a contact area corresponding to the sensed object, wherein if the sensed object does include the occluded portion, the boundary representation encompasses at least part of the occluded portion of the sensed object and at least part of a non-occluded portion of the sensed object when the sensed object includes the occluded portion;
• and
• performing a user interface action when the boundary representation indicates that the user interface action is to be provided.