1. An image processing system comprising: memory means for storing an image in the form of vectors; discrimination means for reading vector data representative of the image stored in said memory means and discriminating, on the basis of a point train comprising a plurality of points indicated by said vector data, a respective direction in which each of the plurality of points is to be moved relative to at least one other of the points, the plurality of points comprising the contour of said image; moving means for moving one or more of the plurality of points on the basis of a result of discrimination performed by said discrimination means; and dot data memory means for storing the points moved by said moving means as dot data.