Image analysis – Image segmentation – Using projections
Patent
1994-12-28
1997-03-18
Couso, Jose L.
Image analysis
Image segmentation
Using projections
382176, 382180, 382289, G06K 934
Patent
active
056130163
ABSTRACT:
An area discrimination system discriminates areas from each other in a binary image. The system includes a reducing unit for reducing a binary image supplied from an external unit, a skew detector for detecting skew of the binary image with respect to a predetermined direction, an extracting unit for extracting black connected components from the reduced image, a block forming unit for forming blocks, each of which includes a plurality of black connected components close to each other, a first merging unit for merging blocks satisfying first conditions into a a character string by using of the skew detected by said skew detector, the first conditions including at least a condition depending on skew of the binary image, and a second merging unit for merging character strings satisfying second conditions into a column by using of the skew detected by said skew detector, the second conditions including at least a condition depending on skew of the binary image.
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"A Method of Document-image Segmentation Based on Projection Profiles, Stroke Densities and Circumscribed Rectangle", Akiyama, T., Systems and Computers in Japan, vol. 18, No. 4, pp. 101-111, Apr. 1987.
Bella Matthew C.
Couso Jose L.
Ricoh & Company, Ltd.
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