最小外接矩形，根据面积和周长判断。实现图象处理的工程计算。-　Compute the minimal bounding rectangle of points in the plane

　usage: [rectx,recty,area,perimeter] = minboundrect(x,y,metric)



　arguments: (input)

　 x,y- vectors of points, describing points in the plane as

　　　　 (x,y) pairs. x and y must be the same lengths.



　 metric- (OPTIONAL)- single letter character flag which

　　　　 denotes the use of minimal area or perimeter as the

　　　　 metric to be minimized. metric may be either　a　or　p ,

　　　　 capitalization is ignored. Any other contraction of　area

　　　　 or　perimeter　is also accepted.



　　　　 DEFAULT:　a　　 ( area )