Bookbinding system, image forming apparatus, and bookbinding apparatus

This invention describes a system for binding books that can print images directly onto the cover. It works by first figuring out how thick the stack of pages (the 'bundle of sheets') is. This thickness can be determined either by counting the pages and knowing their individual thickness, or by physically measuring the stack. Once the system knows the exact thickness, it adjusts where the images are printed on the cover sheet so that they appear in the correct position, even after the cover is trimmed to fit the specific book thickness.