Patent ID: 7522304

Claim:
An image forming system comprising: a print data generation section that generates print data; an image forming section that forms an image on a medium; and a control device that controls the image forming section so as to effect page-layout printing that includes scaling-down of images corresponding to L pages (where L is an integer satisfying a relationship L≧2) on the basis of the print data generated by the print data generation section and printing conditions designated by a user, and laying-out of the scaled-down images within one surface of the medium, the control device comprising: a print data input unit for inputting the print data by way of the print data generation section; a layout page number acquisition unit that acquires the number of pages L designated by the user as one of the printing conditions; a page-break page number acquisition unit that acquires, as one of the printing conditions, a page number K (K is an integer satisfying a relationship K≧1) which is to be considered to be a page break for one copy designated by the user; a determination unit which takes, as copy unit data, page numbers determined by separating the print data input by the print data input unit from a top page side of the print data by every K pages; takes, as surface unit data, page numbers determined by separating the copy unit data from a top page side of the copy unit data by every number of images to be formed on one surface of the medium; takes, as determination object data, the surface unit data including a final page of the copy unit data; and determines whether or not the number of pages “p” included in the determination object data coincides with the number of pages L; and a round processing control unit that controls the image forming section such that blank pages compensating for images corresponding to (L-p) pages are formed in addition to the images corresponding to “p” pages formed on the basis of the determination object data when the determination unit determines that there exists a relationship (p<L).