Position-filtering for land-lift events

A method for baseline management comprising:

• determining first positional information for an input object in a sensing region based on resulting signals, the first positional information comprising a detected displacement of the input object from a preceding frame;
• determining, using a piecewise function and based on a number of frames of the input object being present in the sensing region, a correction factor for the detected displacement, wherein the piecewise function comprises a first interval for displacement to a noise scale value, a second interval for displacement to a finger scale value, and a third interval for displacement starting after the finger scale value and ending at a threshold displacement value;
• applying, the correction factor to the detected displacement to obtain a revised displacement, wherein the revised displacement is less than the detected displacement in the third interval;
• determining second positional information comprising the revised displacement;
• and
• reporting the second positional information.

An input device comprising:

• a plurality of sensor electrodes configured to generate sensing signals;
• and
• a processing circuitry connected to the plurality of sensor electrodes and configured to:
• determine first positional information for an input object in a sensing region based on the sensing signals, the first positional information comprising a detected displacement of the input object from a preceding frame,
• determine, using a piecewise function and based on a number of frames of the input object being present in the sensing region, a correction factor for the detected displacement, wherein the piecewise function comprises a first interval for displacement to a noise scale value, a second interval for displacement to a finger scale value, and a third interval for displacement starting after the finger scale value and ending at a threshold displacement value,
• apply, the correction factor to the detected displacement to obtain a revised displacement, wherein the revised displacement is less than the detected displacement in the third interval,
• determine second positional information comprising the revised displacement and
• report the second positional information.