这是基于opencv的函数,包含图像二值化,最小外接矩形求法,及最小外接矩阵的长和宽,按照自己思路不一定规范,还望指正。

printf("连通区域最小外接矩形顶点坐标分别为:\n");

for (int i=0; i<4; i++)

{

rect_pts[i]= cvPointFrom32f(rect_pts0[i]);

printf("%d %d\n",rect_pts[i].x,rect_pts[i].y);

aaa=(int)sqrt((pow((rect_pts[0].x-rect_pts[1].x),2)+pow((rect_pts[0].y-rect_pts[1].y),2)));

bbb=(int)sqrt((pow((rect_pts[0].x-rect_pts[3].x),2)+pow((rect_pts[0].y-rect_pts[3].y),2)));

if(aaa<bbb)

{

k=aaa;

aaa=bbb;

bbb=k;

}

}

printf("最小外接矩形的长为：%d，宽为：%d。\n\n",aaa,bbb);

//chang=rect_pts[0]-rect_pts[3];

//kuan=rect_pts[0]-rect_pts[1];

//printf("最小外接矩形的长为：%d,宽为：%d\n",chang,kuan);

//画出Box

cvPolyLine(dst, &pt, &npts, 1, 1, CV_RGB(255,0,0), 1);

}

cvNamedWindow("image5",1);

cvShowImage("image5",dst);