Image analysis – Image segmentation – Distinguishing text from other regions
Patent
1996-08-27
2000-01-11
Johns, Andrew W.
Image analysis
Image segmentation
Distinguishing text from other regions
382292, G06K 936
Patent
active
060144580
ABSTRACT:
A page analysis system, which utilizes a block selection application to analyze image data of a page in a multi-page document, includes the features of 1) returning an error code in the case that data to be stored in either a common memory work area or a hierarchical tree storage memory area exceeds the allocated memory space, 2) calculating a skew angle of a page and returning an error code in the case the skew angle exceeds a predefined maximum skew angle, 3) designating a default processing direction in the case a user fails to input directional information of the image data in the page, 4) determining and indicating whether identified picture image information represents a halftone image, a line drawing, a joint line, or unknown picture type, 5) analyzing image data of a portion of a page which has been designated by input coordinates, and 6) identifying a block which contains at least two image types as a composite block and identifying the type of image data within the composite block.
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Canon Kabushiki Kaisha
Johns Andrew W.
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