Contour extraction is an important problem in computer vision , and can be used extensively in many fields such as virtual reality , autonomous guided vehicles , robot environment analysis , object tracking and recognition in monitor system , biology medical image processing , industry online automatic checking and reverse engineering etc . in the field of manufacture , the geometric models are constructed through measuring them , and then they will be used to ameliorate the design and manufacture , this process is called reverse engineering 轮廓提取是计算机视觉的重要研究课题，其在虚拟现实、自控车辆、机器人环境分析、监控系统中的物体跟踪及识别、生物医学图像处理、工业在线自动检测等方面有着广泛的应用前景。在制造领域，通过对实物或模型的测量构造物体的几何模型，进而用于改进设计与制造，又称为反求工程技术。
