PURPOSE: To enable to perform pattern collation correctly, by sectioning the entire plane into small regions, calculating the degree of collation at each small region, and judging if the two patterns are the same from the values.
CONSTITUTION: Two patterns are digitized and stored in the pattern memory 1, the entire area is sectioned into some small areas, and the area designation circuit 4 controls the readout from the pattern memory to obtain the areas S1[D(n,m)], S2[D(n,m)] and the area So[D(n,m)] duplicated parts of two patterns in each area D(n,m), and the degree of collation F[D(n,m)] of each area with equation (I) at the discrimination circuit 3 is calculated, and if the area having the degree of collation a given value or more is more than the specified value, the two patterns are judged as the same.
SHIBAYAMA JIYUNICHI
NAKATSUKA KUNIO
