Abstract: An inductive absolute position sensor has a scale with planar conducting features on a pattern repeating every spatial period TC along a measuring path and a reading head with planar windings: multipolar sine and cosine sense windings of spatial period TF=TC/M, M an integer, a unipolar first drive winding surrounding the sense windings and a multipolar second drive winding of spatial period TC/N along the measuring path, with N=M±1. An electronic circuit makes a first mode measurement using the first drive winding and a second mode measurement using the second drive winding. The absolute position in a range TC is computed from both modes' measurements. The sensor may be as compact as the incremental sensor it replaces, as the scale pattern and second drive winding needed for making it absolute do not need extra space.

Abstract: A method of operating an intermittently measuring or pulsed incremental position sensor, and a position sensor that has noise detecting circuitry activated during each measurement, triggering corrective measurements as long as the influence of noise is detected. Corrective measurements immediately follow and replace a noise-influenced measurement well before the next scheduled measurement. Noise can be detected as a differential amplifier's common-mode input signal, thus clearly separating the influence of noise from the sensor's differential input signal.

Abstract: A method for gaze estimation. The method includes processing training data and determining one or more local-learning base gaze estimation model based on the training data. The local-learning base gaze estimation model(s) can be used for determining one or both of: 2D gaze points in a scene image and 3D gaze points in scene camera coordinates.

Abstract: A capacitive imaging method or device using an array of row electrodes 101 and column electrodes 102 on a substrate 100, wherein cross-capacitance between row and column electrodes is obtained from row electrode 101 self-capacitance measured with the remaining electrodes grounded, column electrode 102 self-capacitance measured with the remaining electrodes grounded, and combined row and column electrode self-capacitance measured with the remaining electrodes grounded. A preferred embodiment is a hand-held wall scanner for detecting hidden features having a two-dimensional display the size of the array and located over it. Hidden features influencing row-to-column cross-capacitances are thus imaged in real size and at their real location.