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. 01, 2013
Filed:
Jan. 19, 2006
Yasushi Adachi, Chiba, JP;
Yasushi Adachi, Chiba, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
An image processing apparatus is provided with a halftone frequency determining section for determining a halftone frequency of an input image data including a plurality of color components. The halftone frequency determining section includes: a threshold value setting section for setting a threshold value for a segment block that is consisting of a plurality of pixels, the threshold value being for use in binarization; a threshold value adjusting section for adjusting the threshold value according to input image data in order to remove an influence of an unnecessary color component; a maximum transition number averaging section for averaging maximum transition numbers of the binary data according to the adjusted threshold value in order to obtain a maximum transition number average; and a halftone frequency estimating section for estimating the halftone frequency from the maximum transition number average. With this, it is possible to determine the halftone frequency accurately.