Title:
【発明の名称】正規化曲線の作成方法
Document Type and Number:
Japanese Patent JP2741996
Kind Code:
B2
Abstract:
A normalizing curve (Crx) is generated by correcting a reference normalizing curve. The character of the normalized curve depends on dummy shadow and highlight points (A4, A3) as well as shadow and highlight points (A2, A1), which are determined as a function of the statistical distribution of densities on an original image. Color original image signals representative of the original image are converted through the normalizing curve to obtain converted color image signals in which a gray balance in the intermediate density region is corrected.
Inventors:
Yonezawa Houji
Application Number:
JP31578292A
Publication Date:
April 22, 1998
Filing Date:
October 30, 1992
Export Citation:
Assignee:
Dainippon Screen Mfg. Co., Ltd.
International Classes:
G03F3/08; G03G15/00; H04N1/407; H04N1/46; H04N1/60; (IPC1-7): H04N1/407; G03F3/08; G03G15/00; G03G15/01; H04N1/46; H04N1/60
Domestic Patent References:
| JP683373B2 | ||||
| JP722340B2 |
Attorney, Agent or Firm:
Shigeaki Yoshida (2 outside)