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:
Jun. 07, 2005
Filed:
May. 18, 2000
Yuji Kamiya, Abiko, JP;
Yuji Kamiya, Abiko, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
There is disclosed the following constitution in order to accurately perform image area separation judgment by one pixel unit of a read image at a high speed and to form an image in which character sharpness is compatible with photograph gradation without generating a false outline in the boundary of character and photograph areas. For this purpose, a first calculation unit calculates the sum of absolute values of differences of image signals between a predetermined pixel in a predetermined two-dimensional area including one noticeable pixel in the read image and the peripheral pixel of the predetermined one pixel in the predetermined two-dimensional area, a second calculation unit calculates the sum of calculation results with respect to the respective pixels in the predetermined two-dimensional area, a judgment unit judges whether the one noticeable pixel is the pixel in the photograph area or the pixel in the character area, and the image processing, and image formation method are changed with respect to the noticeable pixel based on the judgment result.