A method of ball spin estimation using seams lines

In the field of sport, carried out analysis of data against sports-tools and players movement. Above all, the sports use a ball, it is thought that important of ball spin. In this report, we propose an estimation method of ball spin in baseball. Extract seam of ball in moving picture, and estimate detection of spin by using interframe seams movement. By using seams as characteristic, becomes able to detect spin without marker. And we expect that be able to use actual game.