Patent ID: 9116486
Filing Date: 2015-08-25
Classification: G03G

Abstract:
1. A control device comprising: an acquiring unit that acquires code image data expressing a code image having dots that form a dot pattern such that information is embedded; a generating unit that extracts the dots from the code image expressed by the acquired code image data, and generates patch image data expressing a plurality of patch images in which the extracted dots are orderly arranged in different densities; an image-formation control unit that controls an image forming unit to form the plurality of patch images on the basis of the generated patch image data in accordance with a preset image forming condition by using an invisible toner that absorbs infrared light or ultraviolet light; a measuring unit that measures densities of the plurality of patch images formed by the image forming unit; and a changing unit that changes the image forming condition in response to at least one of the measured densities being outside of a density range that is set in accordance with a density of the corresponding dots based on a correspondence relationship between the measured densities and densities of the dots in the plurality of patch images, so that all of the measured densities are set within corresponding density ranges set in accordance with the densities of the corresponding dots.