1 A device that produces a digital representation of an object. Digitizers use various technologies — optics, acoustics, magnetostriction, electromagnetics, resistance, capacitance, etc. — to calculate the position of the stylus or puck that is used to input the data values. A digitizer can be two- or three-dimensional. A common application is to capture information related to schematic line drawings.
2Another name for quantizer, but generally implying that the output is encoded into binary numbers.