Patent ID: 8982258
Filing Date: 2015-03-17
Classification: H04N

Abstract:
1. An imaging device comprising: a solid state image sensor including an optical black region; and a vertical line correction unit for performing vertical line correction on an output signal of the solid state image sensor, wherein the vertical line correction unit includes an OB line selector for selecting an optical black line signal included in output signals of the solid state image sensor, a memory for storing the optical black line signal, a level adjuster for adjusting a level of an optical black line signal of a past frame read out from the memory, according to a video gain of the output signal of the solid state image sensor, a first subtractor for calculating a difference signal between a first optical black line signal of a current frame and the optical black line signal of the past frame whose level has been adjusted, a multiplier for calculating a product by multiplying the difference signal by a cyclic coefficient, a second subtractor for obtaining a signal which is the optical black line signal of the current frame from which the product of the difference signal and the cyclic coefficient has been subtracted, and rewriting the signal after subtraction to the memory as an optical black line signal, and a third subtractor for subtracting a signal read out from the memory from an output signal from an effective pixel region of the solid state image sensor.