Flexible air and surface multi-touch detection in mobile platform

An apparatus comprising:

• an interface for a user of an electronic device having a front surface including a detection area;
• a plurality of detectors configured to receive signals indicating interaction of an object with the device at or above the detection area, wherein an image can be generated from the signals;
• and
• a processor configured to:
• obtain image data from the signals;
• obtain a first reconstructed depth map from the image data, wherein the first reconstructed depth map has a higher resolution than the image;
• and
• apply a trained non-linear regression model to the first reconstructed depth map to obtain a second reconstructed depth map.

A method comprising:

• obtaining image data from a plurality of detectors arranged along a periphery of a detection area of a device, the image data indicating an interaction of an object with the device at or above the detection area;
• obtaining a first reconstructed depth map from the image data, wherein the first reconstructed depth map has a higher resolution than the image;
• and
• obtaining a second reconstructed depth map from the first reconstructed depth map.