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. 06, 2000
Filed:
May. 27, 1997
Applicant:
Inventors:
Hiroshi Sano, Tenjinkitamachi, JP;
Hiroshi Asai, Tenjinkitamachi, JP;
Assignee:
Dainippon Screen Mfg. Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K / ; H04N / ;
U.S. Cl.
CPC ...
358-19 ; 358456 ; 358459 ;
Abstract
A halftone dot forming method of the invention uses a replicated unit area of prescribed configuration including N pieces of halftone dot areas, where N is an integer of at least 2. An image signal is compared with threshold values assigned to pixels in the replicated unit area to form the halftone dots. The threshold value distribution in the replicated unit area is determined so as to form halftone dots whose areas are substantially equal at an arbitrary halftone dot area rate and which interconnect substantially simultaneously when the halftone dot area rate is 50%.