Image analysis – Histogram processing – For setting a threshold
Patent
1985-06-12
1989-02-21
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
358101, 36447401, 408 13, G06K 900
Patent
active
048072966
ABSTRACT:
An automatic pattern original reading apparatus is disclosed in which perforation position coordinate data of a pattern original indicating a perforation position of a printed substrate is stored beforehand, and a hole diameter indication sheet having a colored indication which discriminates perforation diameter and which is located at a position corresponding to the perforation position of the pattern original is placed on a table. The table and an optical system for optically reading reflected light from the color indication through color filters are moved relatively to each other by position control circuits to the perforation position. The color detection output from the optical system is discriminated with respect to color by a color discrimination circuit, and the color discrimination output is stored in a memory as hole diameter information in a corresponding relationship with the perforation position coordinate data.
REFERENCES:
patent: 3471684 (1969-10-01), Berezov
patent: 3632993 (1972-01-01), Acker
patent: 4135239 (1979-01-01), Hamill, III et al.
patent: 4398136 (1983-08-01), Tanaka
patent: 4485453 (1984-11-01), Taylor
patent: 4486128 (1984-12-01), Baker et al.
patent: 4624607 (1986-11-01), Kato et al.
Ando Masaaki
Matsuzaka Masaaki
Boudreau Leo H.
Mancuso Joseph
Nippon Seiko Kabushiki Kaisha
Weintraub Arnold S.
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