Patent ID: 8634754

Claim:
A control apparatus configured to control an image forming apparatus including an image forming unit configured to form a transparent image on a sheet on which a color image is fixed and a fixing unit configured to fix the transparent image formed on the sheet on the sheet, the control apparatus comprising: an image data acquisition unit configured to acquire color image data corresponding to the color image fixed 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 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 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 fixed 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 the density of the color image fixed on the sheet is lower than a predetermined density, to control the execution unit to execute the first mode.