Data processing in relation to a multi-touch sensing apparatus

A device for generating touch data, said device comprising:

• an input;
• and
• connected to said input and configured to operate in a sequence of detection frames, each detection frame comprising the steps of obtaining via said input at least one signal representative of objects on a touch surface of a multi-touch sensing apparatus;
• processing said at least one signal for identifying touches;
• determining a set of identified touches and touch data for the set of identified touches;
• and outputting said touch data;
• wherein each detection frame includes a prioritization based on a previous touch which is identified by the step of processing in one or more preceding detection frames, wherein the prioritization is included in at least one of the step of processing and the step of determining, wherein the prioritization in the step of processing comprises a step of actively favoring that a touch corresponding to the previous touch is identified, and wherein the prioritization in the step of determining comprises a step of actively favoring that an identified touch corresponding to the previous touch is included in the set of identified touches.

A method for extracting data from a multi-touch sensing apparatus, said method comprising the steps of

• obtaining at least one signal representative of objects on a touch surface of the sensing apparatus;
• processing said at least one signal for identifying touches;
• determining set of identified touches and touch data for the set of identified touches;
• and
• outputting the touch data;
• wherein each detection frame includes a prioritization based on at least one predefined subarea on the touch surface, wherein said at least one predefined subarea has a fixed location on touch surface or is defined in relation to one or more graphical objects that are displayed on the touch surface, wherein the prioritization is included in at least one of the step of processing and the step of determining, wherein the prioritization in the step of processing comprises a step of actively favoring that a touch is identified within said at least one predefined subarea, and wherein the prioritization in the step of determining comprises a step of actively favoring that an identified touch is included in the set of identified touches if the identified touch is located within said at least one predefined subarea.