Title:
【発明の名称】光電変換装置
Document Type and Number:
Japanese Patent JPH0773335
Kind Code:
B2
Abstract:
An image signal generating apparatus includes an optical system for focusing the image of a photographic film onto a predetermined plane and a scanning device for scanning the image with a photoreceptor positioned at the predetermined plane and generating output signals representing the light intensity distribution of the film. The scanning device performs a first scan of the image and a second scan of the image upon completion of the first scan. During the first scan the levels of the output signals indicative of the maximum density and the minimum density of the film are detected, and during the second scan the exposure of the photoreceptor is controlled in accordance with the detected levels. Also, during the second scan, the output signals are clamped to a clamp level calculated in accordance with the detected maximum density level and the minimum level of the output signals during the first scan.
Inventors:
This report Ryuzou
Kimura Makoto
Masaki Isogai
Sato
Atsushi Kawahara
Kimura Makoto
Masaki Isogai
Sato
Atsushi Kawahara
Application Number:
JP19874583A
Publication Date:
August 02, 1995
Filing Date:
October 24, 1983
Export Citation:
Assignee:
NIKON CORPORATION
Kyodo News Agency
Kyodo News Agency
International Classes:
H04N1/40; H04N1/407; (IPC1-7): H04N1/40
Domestic Patent References:
| JP58178665A | ||||
| JP58156260A | ||||
| JP57208768A | ||||
| JP5839168A |
Attorney, Agent or Firm:
Takao Watanabe
Next Patent: 画像処理装置