Image processing apparatus with an improved detection of ruled lines
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United States of America Patent
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Jan 2, 2018
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app pub date -
Jul 25, 2016
filing date -
Jul 30, 2015
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Abstract
An image processing apparatus includes a reduction processing unit, a connecting pixel group detecting unit, and a ruled line determining unit. The reduction processing unit is configured to (a) set a reduction direction as one of a horizontal direction and a vertical direction, and (b) reduce an original image along the reduction direction by a predetermined reduction ratio without reducing the original image along a direction perpendicular to the reduction direction and thereby generate a reduced image. The connecting pixel group detecting unit is configured to detect a connecting pixel group in the reduced image, the connecting pixel group continuously extending along the reduction direction. The ruled line determining unit is configured to determine a position of a ruled line in the original image from a position of the connecting pixel group in the reduced image on the basis of the reduction ratio.
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