METHOD AND SYSTEM FOR IDENTIFYING DOCUMENTS

摘要

A system for identifying documents includes first reading means (14) arranged to generate a set of first waveforms each corresponding to a sensed character on a document, and a second reading means for sensing characters on a document in a subsequent sensing operation to generate a set of second waveforms. Identifiable features of the first waveforms are compared with identifiable features in corresponding locations in the second waveforms to ascertain if the document sensed in the subsequent sensing operation is the same as that originally sensed. The system includes data acquisition means (16) for obtaining from the first waveforms significant identifiable features each having a value and a location with respect to a starting point of the associated waveform, and means for utilizing both the value and location of each significant identifiable feature to determine the location for an anticipated corresponding identifiable feature in one of the second waveforms.