1. An image inspection apparatus that inspects a read image generated by reading a printed image formed on a recording sheet, the apparatus comprising a processor configured to: obtain a preprint image that reflects an image previously formed on the recording sheet; generate an output target image based on an image formed on the recording sheet having the preprint image previously printed; combine the preprint image and the output target image to generate an inspection image; generate attribute data for each one of a plurality of pixels in the inspection image while generating the inspection image, the attribute data indicating whether the pixel corresponds to drawing data in the output target image or to drawing data in the preprint image; match the positions between the read image and the inspection image for only the pixels corresponding to the drawing data in the output target image to generate a first position match result; match the positions between the read image and the inspection image for only the pixels corresponding to the drawing data in the preprint image to generate a second position match result; and compare between the inspection image and the read image to inspect the read image, the inspection image and the read image being matched in positions using at least one of the first position match result and the second position match result.