1. An image processor comprising: a receiving unit that receives an input of image data in a first color space; a first color conversion unit that performs color conversion of the image data in the first color space received by the receiving unit to image data formed of a first combination of a plurality of color components in a second color space, the first combination of the plurality of color components including a smaller number of color components than the number of color materials to be used in formation of an image; a second color conversion unit that performs color conversion of the image data in the first color space received by the receiving unit to image data formed of a second combination of a plurality of color components in the second color space, the second combination of the plurality of color components being different from the first combination of the plurality of color components and including a smaller number of color components than the number of color materials to be used in formation of an image; and an image generating unit that generates an image based on at least the image data generated by the first color conversion unit and the image data obtained through the color conversion by the second color conversion unit.