The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 11, 2000
Filed:
Aug. 27, 1996
Shin-Ywan Wang, Tustin, CA (US);
Canon Kabushiki Kaisha, Tokyo, JP;
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.