说明：  这个GUI程序让你测量面积和图像中路径的长度，实现了对面积和路径的测量。
(a gui which allow measuring an areas size and a paths length on an image (map). You can calibrate the image scale. You place points using left mouse button and remove points & areas with right mouse button. You have three different methods of measuring the area surface: 1. Monte-Carlo. 2. Triangulation (my method which works really cool but isn t optimal). 3. MATLABs way (which works the best).)