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:
Nov. 19, 2013
Filed:
Nov. 20, 2012
Canon Kabushiki Kaisha, Tokyo, JP;
Go Araki, Suntou-gun, JP;
Yuuji Takayama, Suntou-gun, JP;
Tomoyuki Saiki, Suntou-gun, JP;
Hisashi Ishikawa, Urayasu, JP;
Canon Kabushiki Kaisha, , JP;
Abstract
A 2-pixel averaging unit () halves an input image in the subscanning direction, and a multi-level error diffusion unit () performs multi-level error diffusion processing. A 2-pixel reconstruction unit () replaces each pixel with two pixels adjacent in the subscanning direction. A density value exchange unit () exchanges pixel values adjacent in the subscanning direction in each of 2×2 pixel blocks arranged in a checkered pattern in the image after replacement. High-density blocks each serving as a set of high-density dots and low-density blocks each serving as a set of low-density dots can be generated as 2×2 pixel blocks. The exposure region can be concentrated in PWM conversion.