To obtain processed image data in which the taste of a user is reflected as well when applying gradation converting processing and color converting processing different corresponding to the class of a digital camera to image data obtained by the digital camera.

A 3D LUT for applying gradation converting processing and color correcting processing to image data S0 obtained by the digital camera is prepared by a 3D LUT preparing means 6. In this case, the 3D LUT is prepared by gradation curve and color correction menus corresponding to the class of the digital camera but further, gradation converting processing and color correcting processing are reflected with the taste of the user. The image data S0 are converted by the 3D LUT in a processing means 10, further, sharpness processing is applied and processed image data S13 are provided. The processed image data S13 are outputted as a print P by a printer 14.