CAMERA DEVICE, EXPOSURE CONTROL METHOD, AND PROGRAM

摘要

A camera device (1) is provided with an imaging unit (3) for outputting a long exposure signal and a short exposure signal within one field period; a knee processing unit (12) for compressing a long exposure signal having the luminance level of a knee point or higher at a predetermined compression rate (i.e., decreasing the inclination of an incident light amount-luminance level line representing the variation of a luminance level with the amount of incident light); and a knee control unit (14) for adjusting the knee point and the compression rate according to the luminance level of a synthesized signal obtained by synthesizing the long exposure signal and the short exposure signal. In this knee control, the knee point and the compression rate are adjusted, so as to make the knee point lower with an increase in the luminance level of the synthesized signal of the long exposure signal and the short exposure signal and revert the inclination of the incident light amount-luminance level line to the original state thereof. Consequently, it is possible to obtain an image sharply contrasted in bright parts within a screen.