基于Freeman链码的自由曲线直线逼近算法
n code is proposed so as to get the approximation nodes. Thus， a more accurate approximation of the curve can be achieved. In addition， this method can not only be applied to straight lines， arcs and non-circular curves， but also curves which have complex shape and can not be described by an explicit function. The experiment results show that the algorithm is simple， rapid， accurate，
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