Title:
【発明の名称】自動露出調整装置
Document Type and Number:
Japanese Patent JP2517407
Kind Code:
B2
Abstract:
PURPOSE:To facilitate the detection of the brightness distribution on a picked-up screen and to attain smooth exposure adjustment by adopting the fuzzy deduction employing a ratio of brightness evaluations of two optional areas among plural areas resulting from divisions of the screen as an input variable for the detection. CONSTITUTION:A picked-up screen is divided into areas A1-A6, and normalized brightness evaluation values V1-V6 are outputted from normalizing circuits 51-56. Then a brightness decision circuit 57 detects the brightness distribution of each area based on the evaluation values V1-V6 and the priority of each area is decided. Then the fuzzy deduction employing a ratio of brightness evaluations of two optional areas as an input variable is adopted from the decision processing. Since ambiguous border information is used as it is, the detection of the brightness distribution is facilitated. Moreover, the exposure adjustment in which the contrast change in the screen is smooth is implemented by using the priority as the result of the detection for the exposure control.
Inventors:
HARUKI TOSHINOBU
Application Number:
JP23624489A
Publication Date:
July 24, 1996
Filing Date:
September 12, 1989
Export Citation:
Assignee:
SANYO DENKI KK
International Classes:
G03B7/28; H04N5/235; H04N5/238; (IPC1-7): G03B7/28; H04N5/235; H04N5/238
Domestic Patent References:
| JP61254940A | ||||
| JP6262229A | ||||
| JP62198722A | ||||
| JP6482265A |
Attorney, Agent or Firm:
Koji Yasutomi (1 person outside)