The study proves that the method from gray picture to black and white picture, vectorgraph, and at last rebuilding the 3D mold is feasible and practicable in the reverse engineering field.

• 研究证明从灰度位图图像到黑白位图图像、矢量图像,最后实现三维重建的方法在反求工程上的可行性和实用性。