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:
Jul. 28, 1992
Filed:
May. 23, 1991
Applicant:
Inventors:
Takashi Numakura, Tokyo, JP;
Iwao Numakura, Tokyo, JP;
Assignee:
Yamatoya & Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ; H04N / ;
U.S. Cl.
CPC ...
358298 ; 358 80 ;
Abstract
Light intensity values as picture information of a color original are obtained by using photographic density characteristic curves of the color-film original, instead of conventional density values. Thus obtained light intensity values are processed by conducting a specific tonal conversion formula (1) to obtain color-separation curves for color (C, M and Y) plates. On the basis of the color-separation curves for the color plates, a range to be entered black is determined, and a color-separation curve for a black (B) plate is set by conducting the same tonal conversion formula (1).