采用贝塞尔算法生成贝塞尔曲线，调整控制点显示不同的曲线-The Bessel algorithm is used to generate the Bessel curve, and adjust the control points to display different curves.

opencv实现的贝塞尔曲线的演示程序，方便初学者入门-Opencv implementation of the Bessel curve demo program for beginners