Patent ID: 8229340

Claim:
A control apparatus configured to control an image forming system including a color image forming unit configured to form a color image on a sheet, a transparent image forming unit configured to form a transparent image on the sheet, a first fixing unit configured to fix color images formed on the sheet, and a second fixing unit configured to fix the transparent image formed on the sheet, the control apparatus comprising: an image data acquisition unit configured to acquire color image data corresponding to a color image to be formed on the sheet; an area acquisition unit configured to acquire information about an area, the area being selected by a user so that glossiness of the area is relatively higher than that of other areas; an execution unit configured to execute a first mode in which the transparent image forming unit forms a transparent image on the area of the sheet, the information about the area being acquired by the area acquisition unit, or a second mode in which the transparent image forming unit forms a transparent image on an area of the sheet where an image can be formed other than the area, the information of which is acquired by the area acquisition unit; and a control unit configured, if a density of the color image to be formed on the sheet is equal to or higher than a predetermined density, to control the execution unit to execute the second mode, and configured, if a density of the color image to be formed on the sheet is lower than a predetermined density, to control the execution unit to execute the first mode.