Appearance data including at least color information and gloss information of an object to be reproduced is inputted. Color mapping is performed to map the color information into a color reproducible range of an appearance reproduction apparatus, based on information indicating an appearance reproducible range of the appearance reproduction apparatus. A gloss reproducible range, in which the appearance reproduction apparatus can reproduce gloss while keeping the color information after the color mapping, is obtained based on the information indicating the appearance reproducible range. Gloss mapping is performed to map the gloss information into the gloss reproducible range. An output signal to be outputted to the appearance reproduction apparatus is generated based on mapped appearance data including the color information after the color mapping and the gloss information after the gloss mapping.