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. Yo

计算运动中单摆的长度、确定圆形目标、测量角度、灰度图像的属性测量、磁带滚动半径的测量-Calculate the length of the pendulum movement to determine the circular target, measuring angles, measuring the properties of gray-scale images, rolling radius of the measuring tape