Patent ID: 7715051

Claim:
An image forming apparatus that receives printing data including image drawing data, and job information specifying a name of an application program used to generate the image drawing data, the apparatus comprising: a data analyzer for analyzing the job information to determine whether the image drawing data were generated by a particular application program for generating an image to be displayed by a projector; a data quantity assessor for analyzing the image drawing data to determine a quantity of data to be printed and comparing the quantity of data to be printed with a predetermined threshold; and a gray-scale correction value memory storing saving-mode gray-scale correction values that are used for gray-scale correction in a saving mode to reduce usage of a consumable image forming agent; and an image forming unit for forming a first image according to the image drawing data by a first process if the image drawing data were not generated by the particular application program, or the quantity of data to be printed does not exceed the predetermined threshold, and for forming a second image according to the image drawing data by a second process which uses the saving-mode gray-scale correction values if the image drawing data were generated by the particular application program and the quantity of data to be printed exceeds the predetermined threshold, the second process using less of a consumable image forming agent than the first process.