Image recorder having more than one recording head and image recording system containing the image recorder

An image recording system that comprises an image data supply part for supplying an image data;

• a holding part for holding a recording material of said approximately cylindrical shape;
• and plural recording heads movable in an axial direction of said approximately cylindrical shape and capable of individually scanning over said recording material, and that records image on said recording material by scanning over said recording material while driving said plural recording heads based on said image data, said image recording system comprising:
• a division location setting part that sets a division location of said image data based on image layout information in said image data created by an image processing apparatus for assigning page data and image parts;
• an image data division part that divides said image data into plural division areas based on said division location so set;
• a scan start position setting part that sets scan start positions of said plural recording heads so as to correspond to said plural division areas, respectively;
• and
• a head movement control part that directs said plural recording heads to movably scan in said axial direction from said scan start positions so set, so that said plural recording heads perform image recording concurrently, wherein
• said image layout information contains page data layout information for allocating page data on a large page as an aggregate of plural pages,
• said image layout information further contains information about types of image parts for allocating the image parts on said large page and for indicating that each image part is either a pattern, a character, or a line drawing, and
• said division location setting part, by referring to said information about the types of image parts, sets said division location so as to avoid an overlap of an image part that is a pattern and said division location.