Title:
COLOR COPYING MACHINE
Document Type and Number:
Japanese Patent JP3495385
Kind Code:
B2
Abstract:
PURPOSE: To obtain a color copying machine capable of reproducing a part corrected by a fluorescent pen on an original.
CONSTITUTION: When a density is designated by a 'background level' adjustment key of a key operation section 51, a reference voltage of an A/D converter 392 is revised in response to a designated density at reading of a reference white level board 19 and a signal from a CCD 38 is stored in a shading correction circuit 40 as a reference white level. A signal from the CCD 38 at reading of the original is subject to shading correction based on a reference black level and white level by the shading correction circuit 40. Moreover, 7-stages of tables are provided for RGB conversion table in a digital processing section 41 and any of the tables is selected based on the 'background level' adjustment key.
Inventors:
Masaaki Kogure
Kotaro Yonaga
Kotaro Yonaga
Application Number:
JP12138093A
Publication Date:
February 09, 2004
Filing Date:
May 24, 1993
Export Citation:
Assignee:
株式会社リコー
International Classes:
G03G15/01; H04N1/40; H04N1/407; (IPC1-7): H04N1/407; G03G15/01
Domestic Patent References:
| JP6297474A | ||||
| JP63245176A |
Attorney, Agent or Firm:
Kenjiro Take (1 person outside)