| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain image of a wide dynamic range, when subjects having large differences in luminance level, such as the inside and the outside of a tunnel in the daytime are mixed at the same time, and to provide an image which an observer easily sees without a flicker by outputting an image of only of the standard exposure video signal by sensing the flickers generated in a short time exposure video signal, when the differences in the luminance level become small at night, or conversely when the outdoors is dark and the inside of the tunnel is bright a situation opposite to daytime. <P>SOLUTION: The situation of the generation of flickers is detected by the situation of average illuminance level of the short time exposure video signal. When fluctuations in the average luminance level is detected by at least the prescribed number of times, switchover to the standard exposure signal is performed and this is output. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
