公开(公告)号：CA1313264C

公开(公告)日：1993-01-26

申请号：CA601792

申请日：1989-06-05

Applicant: IBM

Inventor： DINAN RAYMOND F ,  FALLON HUGH C ,  MALIN JERALD R ,  RODITE ROBERT R ,  ROHE CLAIR F ,  ROHRER GENE D

IPC: H04N1/17 ,  G06F15/64

Abstract: SYSTEM FOR SCANNING DOCUMENTS WITHOUT LOSS OF IMAGE DATA A document processing system directs documents at a high rate of speed past an optical scanner which captures written information on the documents as video image data. The video image data is directed over a data channel to a host computer system where the data is stored on a mass data storage device for subsequent retrieval. A buffer is provided between the scanner and the data channel, which receives data a rate which varies in relation to the amount of information present on the documents. Data is extracted from the buffer at a rate which is limited by the host computers channel transfer rate. A control means is associated with the buffer and is operable for controlling a hierarchy of actions ranging from slowing down the incoming data stream to stopping the data stream altogether in order to prevent any loss of video image data due to overfilling of the buffer. CT9-86-008

公开(公告)号：CA1204872A

公开(公告)日：1986-05-20

申请号：CA454742

申请日：1984-05-18

Applicant: IBM

Inventor： CHAMBERLAIN SAVVAS G ,  PENNINGTON KEITH ,  ROHRER GENE D

IPC: G06G7/19 ,  H04N1/409

Abstract: The invention discloses apparatus for receiving a plurality of inputs and subjecting the inputs to a Laplacian operator function. The apparatus comprises CCD shift register means for receiving the inputs and introducing positive and negative weights to respective ones of the inputs, and combines the inputs to produce the Laplacian operator function.