A first image processing device uses image data, and image generation information that is associated with the image data and that includes at least aperture information, operating mode information, and lens focal length information at the time of generation of the image data, to perform sharpness adjustment of the image data on the basis of the aperture information, the operating mode information, and lens focal length information included in the image generation information. A second image processing device analyzes image data to obtain a sharpness characteristic value indicating a characteristic relating to sharpness of the image represented by the image data; and uses image data, and image generation information that is associated with the image data and that includes at least aperture information and operating mode information, to perform sharpness adjustment of the image data on the basis of the sharpness characteristic value, together with the aperture information and the operating mode information included in the image generation information.