| 摘要 |
An image data processing circuit and an image data processing method capable of determining a reference signal level corresponding to black in an image with high precision by suppressing occurrence of line dependency and the like in a dark current component signal included in image data output from a solid state image pickup device. A reference dark current component data holding unit (2G) selects a reference line from a solid state image pickup device (5G) and holds a dark current component of the reference line as a head line average value (RD). To a subtraction circuit (4G), dark current component data (DD) and effective pixel data (ED) are sequentially input on the line unit basis. A differential circuit (3G) obtains, as a detection value (OBLD), a change amount with respect to the head line average value, of the dark current component data (DD) included in a preceding line. The subtraction circuit (4G) subtracts the detection value (OBLD) from the dark current component data (DD) and the effective pixel data (ED) . |
