Image Engraving Design Using 3D Vector Curves

A new kind of 3D vector curve with scalable width is implemented. The local width, orientation and curvature of the curve can be changed easily and flexibly. Moreover, the change of vector curve width can be used to represent the grey scale of images, so we can simulate the effect of traditional engraving. In addition, a method of generating a certain number of equidistant curves by blending curves is presented.