The invention provides an imaging apparatus in which when a difference in
sensitivity between two photosensitive elements having different
sensitivities is used to achieve a wide dynamic range, a correction
amount of a low sensitivity portion is determined from information of a
high sensitivity portion to reduce a burden of an internal process.A
black level correction value of a dependent photosensitive pixel is
calculated by multiplying a black level correction value of a main
photosensitive pixel by the ratio of the cell area of the main
photosensitive pixel to the cell area of the dependent photosensitive
pixel. It is not necessary to perform control to capture an imaging
signal from the dependent photosensitive pixel belonging to an OB portion
for determining the black level correction value of the dependent
photosensitive pixel. Furthermore, if control to capture the imaging
signal from the dependent photosensitive pixel is not performed in the OB
portion, a processing system may be stopped during such a period. If the
processing system is stopped during the period, contribution can be made
to reduction in process and power consumption in an overall digital
camera.