| 摘要 |
<p>Of the output signals of a solid state image sensor 101, only the signals in a vertical OB line period are selected by an OB line selector 105. A level adjuster 107 adjusts the level of a past vertical OB line signal read out from the line memory 106 during a first vertical OB line period of a frame where the amplification factor of an amplifier 102 has changed, and outputs the same. A subtractor 109 subtracts the signal whose level has been adjusted from a current vertical OB line signal. A multiplier 111 multiplies, via a selector B 111, the signal after subtraction by a cyclic coefficient K 1H for the first vertical OB line period of the frame where the amplification factor has changed. A subtractor 112 subtracts the multiplication result from the current vertical OB line signal, and rewrites the subtraction result to the line memory 106.</p> |
