Imager and stripe noise removing method

摘要

An image pickup apparatus which can remove flickers appearing in a frame of a solid-state image pickup device is disclosed. A light amount detector ( 2 ) is provided in the proximity of a sensor light receiving section ( 1 ), and the amount of light incoming to the sensor light receiving section ( 1 ) is normally monitored by the light amount detector ( 2 ). Detection data of the light amount detector ( 2 ) is signaled to a light amount detection data processing section (correction value calculation section) ( 4 ). The light amount detection data processing section ( 4 ) detects a current light amount condition based on the detection data inputted thereto and calculates correction data for removal of flickers based on the detected current light amount condition. A microcomputer performs an calculation process to obtain a maximum value and a minimum value of the light amount to detect the period of light emission of a light source. Then, an inverse number of an integration value of the light amount is multiplied by the image pickup signal such that the phase is displaced by 90° with respect to the light emission period of the light source to perform correction. The correction is performed by sending the correction data to a multiplier (gain amplifier) section ( 7 ).