Strobe light emission control system

Abstract

Abstract PURPOSE:To pick up an image with a correct color balance even under an artificial light source by controlling the strobe light emission by taking the content of ripple component in the right from the light source at least as one condition. CONSTITUTION:An LPF 2 eliminates the pulsating current component of an output from a photoelectric conversion means 1, and transmits only a signal corresponding to the brightness to an exposure value setting means 3, and a BPF 4 detects the ripple in commercial frequency caused by an artificial light source such as fluorescent lamp that is included in the quantity of external light. The peak value or the mean value of the ripple component is detected by a detector 5, the signal is level-adjusted by a level (gain) adjuster 6, and in case the output level of the adjuster 6 is higher than that of the LPF 2, a comparison means 7 outputs an H-signal. Therefore, even if there is a large quantity of external light, if ripple component is in a large value and the light is judged to be an artificial light, a strobe signal is issued from an OR gate 8 in order to adjust the white balance.

Inventors

• 👤 Hideaki Yoshida
• 👤 英明 吉田
• 👤 Hiroaki Nakamura
• 👤 博明 中村
• 👤 Akio Terane
• 👤 明夫 寺根

Bibliographic Details