PURPOSE: To attain the accurate recognition of an object by detecting a high speed a position shift degree of an input pattern compared with a standard pattern and executing the correction of positions between both patterns.
CONSTITUTION: When a standard pattern P and an input pattern Pi are fetched by a memory, the distance (number of picture elements) from the head pattern component picture element (black) is also measured for both patterns by a counter 15. An arithmetic processor 17 calculates a position shift amount between both patterns Pi and P based on the output of the counter 15. This shift amount is preset to address counters (vertical and horizontal counters 7 and 8) of a memory 5 storing the pattern P. Then the component data of the pattern Pi of a buffer memory and the pattern P are read out at a time for measurement of the degree of coincidence between both pattern data.
ISHIHARA SUGURU
NISHIMURA MASAHIRO
TSUKIYAMA NORIYUKI
HINOTA MASAHIRO
| JPS58189781A | 1983-11-05 |