I had similar issues with image, what did help as well as setting the DPI lower and speed and reducing the overscanning to 0.1% if Bi directional Scanning selected, try first with Bi directional scanning off, to see if the problem reduced if so then with over scan set to 0% with it on. it helped a lot ! but images are never as easy as they seem to achieve a good result. but hope this helps, worth a try at the least.