Image processing apparatus, radiation imaging apparatus, control methods for them, gain image creation method, radiation imaging system, and storage medium
An image processing apparatus comprising: an obtaining unit configured to obtain a plurality of radiation images that have been sensed without arranging an object and include a defect, and information about the defect included in the radiation images； and a generation unit configured to generate a sensitivity correction image not including the defect based on the plurality of radiation images and the information about the defect.
