In image reproduction, a method of preventing the reproduction of a defect in an area (74) of the image, which has been indicated as including a defect-containing region, comprises comparing pixel values in a region (A.sub.o) of the said area outside the defect-containing region (72) to ascertain the...http://www.google.com.au/patents/US4484230?utm_source=gb-gplus-sharePatent US4484230 - Image reproduction method and apparatus
