Patent ID: 6897989

Claim:
A black reference data calculation method for calculating black reference data of a plurality of pixels constituting an image pick-up system for each pixel, the method comprising: a light shut-off step of shutting off light incident on the image pick-up system; a detection step of detecting an output value of an electric signal output from each of the pixels a predetermined number of times for each pixel in a state that light incident on the image pick-up system is shut off; an output value adding-up step of adding up the output values detected at the detection step for each pixel; an average value calculation step of dividing the sum total of the output values added up at the output value adding-up step by the number of times the output value has been detected at the detection step to calculate an average value of the output values for each pixel; and a storage step of storing a difference between a previously setup value and the average value calculated at the average value calculation step for each pixel as the black reference data.