1. An image processing apparatus comprising: a processor; and a memory coupled to the processor, the memory storing instructions which, when executed by the processor, cause the image processing apparatus to: predict a noise amount based on RAW image data acquired by image capturing under fixed image capturing conditions, a color adjustment parameter, which is information on color adjustment specified by a user, and the fixed image capturing conditions; determine changed image capturing conditions, the contents of which were changed from the fixed image capturing conditions based on the predicted noise amount; determine a noise reduction parameter indicating a degree of noise reduction processing based on the changed image capturing conditions and the predicted noise amount; and perform noise reduction processing in accordance with the noise reduction parameter for second RAW image data acquired by image capturing under the changed image capturing conditions.