本程序用于区分海面舰船与海水。应用算法为小区域方差对比，程序简单，适用于初学者参考的例程。主程序为var.m，dxout.m为方差计算程序。其余图片为测试图片。-This procedure is used to distinguish sea ships with seawater. Application algorithm for small regional variance contrast, simple procedures, suitable for beginners refe