Digital video line delay circuit
Optical reading system Patent #: 4300123
ApplicationNo. 06/154742 filed on 05/30/1980
US Classes:235/436, Readout control235/456, Multiple column code382/175Separating document regions using preprinted guides or markings
ExaminersPrimary: Boudreau, Leo H.
Attorney, Agent or Firm
International ClassG06K 7/10 (20060101)
AbstractIn a document scanning scheme where data is preceded on the document by a preprinted document scan mark, circuitry is employed to utilize multiple line scans of the scan mark by a line scan camera to verify the presence of a scan mark and avoid erroneous response to random marks on the document.