Image analysis – Image segmentation – Distinguishing text from other regions
Patent
1995-12-18
2000-08-15
Mehta, Bhavesh
Image analysis
Image segmentation
Distinguishing text from other regions
382173, 358462, G06K 934
Patent
active
061048321
ABSTRACT:
An image processing apparatus includes an image input unit which inputs an image, and an image thinner for taking the OR of (m dots in the vertical direction).times.(n dots in the horizontal direction) of the input image, thereby thinning out the (m.times.n) pixels and newly forming one pixel. A labeler adds labels to black pixels of every line of the thinned out image. The same label is added to pixels which are continuous in the vertical, horizontal or oblique direction and simultaneously traces a rectangle. A separator detector distinguishes a rectangle corresponding to a sentence portion, a rectangle corresponding to a figure or photograph, a rectangle corresponding to a table, and a rectangle corresponding to a separator, by using a width, a height, an area, and a pixel density (the number of pixels in the area) of the rectangle added to the label by the labeler. The area of the input image is divided based on the result of the detection of the separator detector.
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Matsumoto Akihiro
Nakatsuka Tadanori
Niki Tohru
Saito Kazuyuki
Canon Kabushiki Kaisha
Mehta Bhavesh
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