图像修复：

通过先验知识，找到被绿色点污损的区域，以此建立起无损区域蒙版，从区域外层逐步向内层修复被损的像素点，当污损点在非平滑区域的时候，选择出原图纸最佳的颜色过渡路径，用此路径上的值进行填充。-Image restoration:

By prior knowledge was found defaced Green Point area, in order to establish non-destructive regional masks, gradually repair the damaged area of the pixel from the outer to the inner, defaced point when non-smooth regions, the choice the best path of the original drawing color transition, on this path with the value filled.