Image analysis – Histogram processing – For setting a threshold
Patent
1990-05-01
1991-11-12
Brinich, Stephen
Image analysis
Histogram processing
For setting a threshold
382 9, G06K 920
Patent
active
050654420
ABSTRACT:
In a character recognition apparatus, the determination processing of whether or not there exists a character line in a segment region is divided into two processes. The initial confirmation process determines the existence or nonexistence of a character line in a segment region having a first size using first determination means. The second confirmation process determines the existence of a character line in a segment region having a second size which is larger than the first size using second determination means. Hence, a noise image is determined to have no character line at a stage in which the segment region has been set to the second size, and a correct character recognition operation is therefore performed. Furthermore, when there is a plane image within the first region, it is determined that there is no character line at a stage in which the small segment region having the first size has been set. Hence, it is possible to shorten the time for the recognition processing.
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patent: 4562594 (1985-12-01), Bednar et al.
patent: 4817186 (1989-03-01), Goolsbey et al.
patent: 4943801 (1990-07-01), Oguchi
patent: 4965678 (1990-10-01), Yamada
Brinich Stephen
Canon Kabushiki Kaisha
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