Control signal generating circuit of video camera

Abstract

Abstract PURPOSE:To generate a control signal for iris control, gain control, etc., by processing the output of a digital video camera through a microcomputer. CONSTITUTION:The video output of an image pickup element 1 is digitized by an AD converter 10 and supplied to a delay circuit 12 and horizontal split registers 13A-13C through an adder 11. Those delay circuit 12 and registers 13A-13C are controlled by a decoder 16 which receives outputs of horizontal and vertical scanning counters 17 and 18, and their outputs are supplied to the adder 11 through gates 14A-14C. Consequently, the registers 13A-13C supply mean data of blocks obtained by dividing an image pickup picture to a microcomputer 19 through a latch 15. The microcomputer 19 processes those data. In this case, the microcomputer 19 performs light measuring processing such as averaged light measuring and center-weighted measuring to control an iris 2.

Inventors

• 👤 Katsuro Miyata
• 👤 宮田　克郎
• 👤 Fumio Nagumo
• 👤 名雲　文男

Bibliographic Details