by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes

Methods or arrangements for sensing record carriers > by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes

Methods or arrangements for sensing record carriers, (methods or arrangements for marking the record carrier in digital fashion G06K1/00; pattern recognition G06F18/00; arrangements for image or video recognition or understanding G06V10/00; character recognition, recognising digital ink or document-oriented image-based pattern recognition G06V30/00) > by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes