An image processing apparatus includes an acquiring unit and an assigning unit. The acquiring unit is configured to acquire first image information on a first image and second image information on a second image read by irradiating, with light at respective different wavelengths for read, a printing medium on which at least the first image and the second image to be irradiated with light at different wave lengths to read are mixed. The assigning unit is configured to assign image information on one or more color systems constituting the first image information and image information on one or more color systems constituting the second image information to any of communication paths for supplying image information to a subsequent stage image processing unit configured to perform predetermined image processing on the first image information and the second image information.