| 摘要 |
Disclosed is a method of reading magnetic ink characters or similar patterns provided in a predetermined area on a carrier medium, such as a personal check, by scanning the carrier medium with a magnetic head wherein the drive source for the scanning motion is a pulse motor. To prevent magnetic noise generated by the pulse motor from affecting the results of reading the magnetic patterns the reading step is preceded by a step for measuring the magnetic noise component and followed by a step for subtracting the measured noise component from the signal resulting from the reading step. The noise component is measured as the output signal of the magnetic head while the pulse motor is driven but the magnetic head is outside of the predetermined area of the carrier medium. <IMAGE> |
