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:
Sep. 01, 1992
Filed:
Sep. 25, 1990
Applicant:
Inventors:
Yoshinori Awata, Kanagawa, JP;
Noriaki Tsuchiya, Kanagawa, JP;
Assignee:
Fuji Xerox Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
36472405 ;
Abstract
A digital filter capable of obtaining a filter output by adding the products of image data in a filter operation area with a set of desired filter constants, selecting a predetermined portion among the calculated bits with an output bit selection circuit, and expressing the result retrieved according to the decimal point format of the filter constants. According to the digital filter described above, different types of filter operations such as a low-pass filter operation and a high-pass filter operation can be performed accurately.