Image analysis – Histogram processing – For setting a threshold
Patent
1985-11-14
1987-06-09
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
340731, 382 1, G06K 942
Patent
active
046726810
ABSTRACT:
A method and apparatus for the automatic adaptation of mailing formats of different sizes to be scanned opto-electrically, to a given image reproduction format, is used in particular for scanning the address fields of letters and the like. An image content reduction is carried out in such a way that in the scanning of the mailing in dependence on the height and/or length excess of the mailings from given standard values H.sub.o, L.sub.o, a corresponding number of image points within each image scan element are omitted according to a given rule and the image reproduction is generated by non-omitted image points of the image scan elements. In order that lettering edge sharpness will remain equally sharp, the image point magnification between image point scan size and image point reproduction size is maintained constant. In particular with a columnwise scanning, the rule for the omitting of image points is chosen so that at least within the mailing portion bearing the information, the omitting of image points in the scan direction and perpendicular thereto, occurs periodically.
REFERENCES:
patent: 3670099 (1972-06-01), Oliver
patent: 4013999 (1977-03-01), Erwin et al.
patent: 4168489 (1979-09-01), Ervin
patent: 4447882 (1984-05-01), Walz
patent: 4573200 (1986-02-01), Bednar et al.
Boudreau Leo H.
Licentia Patent-Verwaltungs GmbH
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