Control apparatus, control method, and storage medium

A control apparatus includes: a control unit that controls an image capturing device and an illumination device that includes multiple light sources, and obtains a first number of reference images corresponding to the first number of the light sources being less than the multiple light sources; and a generation unit that generates correction data for correcting illuminance unevenness of a target image based on the first number of the reference images, which is obtained by capturing an image of a measurement target object different from the reference object while turning on a light source of interest out of the multiple light sources. The generation unit generates the correction data corresponding to a light source not included in the first number of the light sources by carrying out interpolation processing while using at least two reference images out of the first number of the reference images.