Computer Methods for Creating Photomosaics
David L. Milgram · IEEE Transactions on Computers · 1975
A technique is described which allows overlapping images to be combined into a photomosaic in which the visual impact of the introduced seam. has been minimized. Images which have been brought into geometric and gray scale register are combined on a line-by-line basis by choosing a "best" seam point for each line. The resulting artificial edge at the seam point is then locally smoothed.