Automatic iris controller for video camera

Abstract

Abstract PURPOSE:To easily control automatic iris of a video camera by storing plural kinds of rules of the control mode in response to the level of the video signal and generating the control signal. CONSTITUTION:A peak value of the video signal obtained from an image pickup means is detected by a peak detection circuit 12 and the peak value and the video signal are fed to a control signal generating means 16 to control the incident luminous quality of the image pickup means based on the control signal. In this case, the generating means 16 stores plural kinds of rules of the control mode in response to the level of the video signal and generates a control signal based on 1st and 2nd weight coefficients resulting from a difference between a level of the video signal and the peak level and on how much the level of the video signal is suited to the plural kinds of rules.

Inventors

• 👤 Hiroki Miura
• 👤 三浦　博揮

Bibliographic Details