| 摘要 |
A dynamic iris controller includes: a diaphragm and video-image controller including a video-image analyzer analyzing a picture signal, an association setting unit setting a diaphragm stop of a diaphragm mechanism, a color balance correction value, and a lightness correction value according to analysis data analyzed in the video-image analyzer, and a black period controller setting a black period in the picture signal according to a predetermined black time length; a diaphragm driver outputting a drive signal to the diaphragm mechanism so as to set the diaphragm stop of the diaphragm mechanism to be fully closed for the black period set by the black period controller and to set the diaphragm stop to have a value set by the association setting unit for the other period; and a video-image processor correcting color balance and lightness of the picture signal using the correction data set in the association setting unit.
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