Title:
WHITE BALANCE ADJUSTING DEVICE
Document Type and Number:
Japanese Patent JPH01112887
Kind Code:
A
Abstract:
PURPOSE:To eliminate the influence of the object color of a white balance adjustment by providing plural input devices on a white balance automatic adjusting device. CONSTITUTION:A microcomputer 11 reads in a (R-Y)BP and a (B-Y)BP by an A/D converter 10 as soon as the peak detecting signal of a peak detecting circuit becomes 1. A color difference signal level at the time of the blanking of a vertical synchronizing signal is read in by a synchronizing signal VDX of a vertical synchronizing signal V. Based on these data, the microcomputer 11 judges whether it is a light source color or not, selects data, controls the gains of an R signal amplifier 2 and a B signal amplifier 3 based on the selected data. Thus, the white balance adjustment is executed.
Inventors:
OGAWA TAKESHI
SUZUKI MASAO
TAKAYAMA TSUTOMU
JINNAI SHIGERU
SUZUKI MASAO
TAKAYAMA TSUTOMU
JINNAI SHIGERU
Application Number:
JP26933087A
Publication Date:
May 01, 1989
Filing Date:
October 27, 1987
Export Citation:
Assignee:
CANON KK
International Classes:
H04N9/73; (IPC1-7): H04N9/73
Domestic Patent References:
| JPS56116391A | 1981-09-12 |
Attorney, Agent or Firm:
Takaharu Takita
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