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:
Feb. 06, 1996
Filed:
Aug. 01, 1994
Masami Ogawa, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
This invention provides a feature extracting circuit including a shift register section arranged to store an image for a predetermined number of lines, the image consisting of a predetermined number of bits, and then to shift the image; a look-up table section for transforming a set of partial image data for a predetermined number of pixels supplied from the shift register section into a direction index and then for outputting the direction index; and a counter section for counting the direction index output from the look-up table section. The feature extracting circuit receives a binary digital image and extracts, as a feature of the image, a direction index which indicates the direction in which the boundary between adjacent black and white pixels extends.