Patent ID: 7164485

Claim:
An image forming apparatus comprising: a receiving section which receives image data from an external device; a decision section which makes a decision of whether image data received by the receiving section is image data for proof printing; a calculation section which includes (i) a page number calculation section which, when the decision section decides that the image data is image data for proof printing, calculates the number of pages of image data received by the receiving section, and (ii) a percentage calculation section which calculates the percentage of a character region and the percentage of a photographic region in the image data; a subtraction section which subtracts the percentage of the photographic region from the percentage of the character region calculated by the percentage calculation section, and provides the result of the subtraction; a determination section which determines a print-time toner saving intensity on the basis of the number of pages calculated by the page number calculation section and the result of the subtraction provided by the subtraction section, the determination section setting the print-time toner saving intensity to a predetermined intensity when the result of the subtraction provided by the subtraction section is greater than a predetermined value, the determination section further determining the print-time toner saving intensity on the basis of the percentage of the character region and the percentage of the photographic region calculated by the percentage calculation section; and a print section which prints the image data with the toner consumption saved more than usual on the basis of the toner saving intensity determined by the determination section.