一个完成栅格图像矢量化功能的程序，主要实现了在图片背景上添加点、线的功能，使用了交互式构图技术，如橡皮条和拖曳，以文本文件保存矢量线的结点，有简单的导入和导出功能。-A complete raster image vectorization function procedure, the main background in the picture to add point, line features, the use of interactive mapping technologies such as rubber and drag to the text file line vector nodes, has a simple the import and export functions.