公开(公告)号：US3573730A

公开(公告)日：1971-04-06

申请号：US3573730D

申请日：1969-10-15

Applicant: IBM

Inventor： ANDREWS DOUGLAS R ,  ATRUBIN ALLAN J

IPC: G06K9/62 ,  G06K9/68 ,  G06K9/06

CPC classification number: G06K9/68

Abstract: A stored logic character recognition system is disclosed that includes a read-only memory in which is stored a set of functions, the evaluation of which leads to the classification of a given binary pattern. A measurement register performs logical operations on the pattern data to generate a plurality of measurement words. An identification sequence for each character is begun by fetching a predetermined word from the read-only memory to a control-word register. Succeeding words are then fetched to a processor register and decoder where they are interpreted as terms of a logical function. The processor evaluates the logical function against the measurements in the measurement register with the final evaluation of a single logical function resulting in the selection of one of two branch addresses in the control-word register. By an iterative or multilevel type of operation, measurements of the character image are built up until an identification is achieved.

公开(公告)号：US3517387A

公开(公告)日：1970-06-23

申请号：US3517387D

申请日：1966-05-09

Applicant: IBM

Inventor： ANDREWS DOUGLAS R ,  ATRUBIN ALLAN J ,  BAUMGARTNER RICHARD J ,  BOND MILTON F ,  HU KUANG-CHI

IPC: G06K9/34 ,  G06K9/12

CPC classification number: G06K9/34 ,  G06K2209/01

公开(公告)号：US3316536A

公开(公告)日：1967-04-25

申请号：US55624566

申请日：1966-06-08

Applicant: IBM

Inventor： ANDREWS DOUGLAS R ,  NOBLE DAVID L

IPC: G06K9/00

CPC classification number: G06K9/186