关键词: 等值线, Bezier曲线, 最小二乘法, 拟合, 光滑

Abstract: In the process of generating contours automatically, it generates a polyline type of contour map if we connect the tracked point with the line. This paper proposes using the multisegment Bezier curve model to fit the contours. At first we use three Bezier curves fitting formula and leastsquares to get the four control points of the first segment of the Bezier curve. Then based on the smooth conditions of the Bezier curve and the acquired control points, we get the four subsegment control points with leastsquares. According to above ideas, we get the smooth contours. In addition, this paper proposes building the special case of the multisegment Bezier curve model in the condition of a smaller grid. Experiments show the proposed method is easy and feasible, and it has good visual effect.

Key words: contours;Bezier curve;leastsquares;fitting;smooth