Abstract: A method of modifying screened image data so that there is no visible seam when the image is printed repeatedly in a circumferential direction, for example using a drum output device. One version applicable to images screened using a supercell includes cutting the image so that the image size in the circumferential direction is an integral number of screen supercells. Another version includes displacing halftone dots in a neighborhood of the seam such that the seam is not visible in a repeated print.

Abstract: A method of modifying screened image data so that there is no visible seam when the image is printed repeatedly in a circumferential direction, for example using a drum output device. One version applicable to images screened using a supercell includes cutting the image so that the image size in the circumferential direction is an integral number of screen supercells. Another version includes displacing halftone dots in a neighborhood of the seam such that the seam is not visible in a repeated print.

Abstract: A method of scanning a plurality of images that arranges a portion of an image medium, in a position with a reference mark roughly aligned. The portion of the image medium is scanned to determine the location of the reference mark. The entire image is then scanned immediately after scanning only the portion with the reference mark. A second image is positioned with a reference mark roughly aligned on a scanner. The portion of the second image that has the second reference mark is scanned to determine the location of the second reference mark. The second image medium is repositioned so that the reference mark is placed accurately in the same position of the scanner which was occupied by the first reference mark. The entire second image is then scanned immediately after repositioning the second image medium. The images, and corresponding reference marks, may be recorded in different image media, or in the same medium, such as a single sheet of film.