An image processing unit 36 includes an information acquisition unit 40, a filter acquisition unit 42, and a filter processing unit 44. The information acquisition unit 40 acquires imaging information of original image data which is acquired by capturing an object image using an optical system. In a case in which the imaging information includes the first imaging condition and does not include the second imaging condition, the filter acquisition unit 42 acquires a sharpening filter which is associated with the first imaging condition and is associated with a representative condition of the second imaging condition. The filter processing unit 44 applies the sharpening filter acquired by the filter acquisition unit 42 to the original image data to acquire sharp image data.