An image processing apparatus comprising, a circuitry configured to perform operations of, setting a target value in a case of correcting degradation in image quality of an image caused by an optical member, based on a characteristic of the optical member, the image being generated by an image sensor by photoelectrically converting an optical image of a subject that has passed through the optical member, acquiring information regarding a state of the optical member, setting first correction values for correcting the degradation in image quality of the image caused by the optical member, based on the target value and the information regarding the state, and correcting the image based on the first correction values.