Image analysis – Histogram processing – For setting a threshold
Patent
1990-10-30
1992-03-17
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
358451, 358 77, G06K 942, H04N 146
Patent
active
050975196
ABSTRACT:
An image reader for reading an image on a document having apparatus for projecting an image of the document optically to permit optical magnification. An image reading device transforms the projected optical image into electrical signals which can be transformed into bi-level signals with the picture element density of the bi-level signals varied. Apparatus is provided for designating picture element density and for controlling the optical magnification in accordance with the designated picture element density.
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Andras Joseph C.
Boudreau Leo H.
Cammarata Michael R.
Minolta Camera Kabushiki Kaisha
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