提出了基于切矢转角局部特征的目标识别与定位算法。
An object recognition and localization algorithm based on local feature-turning Angle between neighbouring tangent vectors, is presented.
采用累加弦长三次样条参数曲线，先求出离散点处两个方向的切矢，进而求解出该离散点的法矢。
This paper presented the solution of normal vector by using the method of the accumulative hypotenuse trispline curve.
通过计算环的最大坐标值点处相邻两条边的切矢的叉积来判断环的方向。
The loop direction is judged through the vector product of the adjacent two edges on the vertex with maximum coordinate value.
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