Television camera

摘要

There is provided a television camera that can automatically adjust a detected video signal balance without using a grayscale chart in order to satisfactorily capture a subject. The television camera adjusts the detected video signal balance by using a white (achromatic) subject and without using the grayscale chart. The television camera firstly captures a white (achromatic) subject. The television camera detects a level of a G signal on a detection gate, and sequentially and automatically adjusts a lens iris in order that the level of the G signal becomes a predetermined signal level (level 71, level 72, level 73, level 74). For each signal level (level 71, level 72, level 73, level 74), the television camera aligns signal levels of R signal and B signal with respect to the G signal, thereby automatically adjusting the detected video signal balance.

主权项

1. A television camera comprising:
an optical system; and a central processing unit (CPU) that controls a lens iris of the optical system, wherein the television camera captures a white subject, and adjusts a detected video signal balance, wherein the CPU adjusts a video signal of the white subject to be converged with a plurality of predetermined signal levels through the control of the lens iris of the optical system, in order to adjust the detected video signal balance, and wherein the CPU sequentially adjusts the lens iris so that a level of a G signal becomes at least three levels, which are a highlight balance level, a dark balance level, and a gamma balance level, through the control of the lens iris of the optical system, and aligns levels of an R signal and a B signal with respect to the G signal for each signal level, in order to automatically adjust the detected video signal balance.