Touch Identification for Multi-Touch Technology

A method comprising:

• determining a first plurality of contact locations in view of a first scan of a touch-sensing surface;
• determining a second plurality of contact locations in view of a second scan of the touch-sensing surface;
• identifying a number of total contact locations in view of the first plurality of contact locations and the second plurality of contact locations;
• and
• performing a first correlation process when the number of total contact locations satisfies a threshold number and performing a second correlation process when the number of total contact locations does not satisfy the threshold number.

A system comprising:

• a touch-sensing surface;
• and
• a processor operatively coupled to the touch-sensing surface and to:
• determine a first plurality of contact locations in view of a first scan of the touch-sensing surface;
• determine a second plurality of contact locations in view of a second scan of the touch-sensing surface;
• identify a number of total contact locations in view of the first plurality of contact locations and the second plurality of contact locations;
• and
• perform a first correlation process or a second correlation process to correlate the first plurality of contact locations with the second plurality of contact locations in view of the number of total contact locations, wherein the first correlation process is performed if the number of total contact locations satisfies a threshold number and the second correlation process is performed if the number of total contact locations does not satisfy the threshold number.

An apparatus comprising:

• a touch controller associated with a touch-sensing surface;
• a processor coupled to the touch controller;
• and
• a memory coupled with the processor, wherein the memory comprises instructions which, when executed by the processor, cause the processor to perform operations comprising:
• determining a second plurality of contact locations in view of a second scan of the touch-sensing surface;
• identifying a number of total contact locations in view of the first plurality of contact locations and the second plurality of contact locations;
• and
• performing a first correlation process when the number of total contact locations satisfies a threshold number and performing the second correlation process when the number of total contact locations does not satisfy the threshold number.