将点的坐标分配给另一个OpenCV C + +

时间:2014-03-11 08:48:31

标签: c++ opencv coordinates translation

我进行了轮廓点的平移(大约300-1000点),即每个点我改变了它的X和Y坐标,用这个公式将矢量XOY的中心移动到重心:

vector<vector<Point> > contours_poly( contours.size() ); 
vector<vector<Point> > contours( contours.size() ); 
for(unsigned int i=0;i<contours.size();i++)
  {
  approxPolyDP( Mat(contours[i]), contours_poly[i], 2, true );
    convexHull( Mat(contours[i]), hull[i], false );
  }



/// centre de gravité

vector<Moments> mu(contours.size() );
  for( int i = 0; i < contours.size(); i++ ){

      mu[i] = moments( contours[i], false );
  }

vector<Point2f> mc( contours.size() );
  for( int i = 0; i < contours.size(); i++ ){
    mc[i] = Point2f( mu[i].m10/mu[i].m00 , mu[i].m01/mu[i].m00 );

  }
 /// Translation*          the program bug here !!
 for(i=0; i < contours.size(); i++)
 { contours_poly[1][i].x -= mc[1].x;
   contours_poly[1][i].y -= mc[1].y;
  } 

 /// draw the new contour
 for(unsigned int i=0;i<contours.size();i++)
  {

  drawContours( drawing, contours_poly, i, colors, 1, 8, vector<Vec4i>(), 0, Point() );
  }

但我不知道是否通过修改大量的点生成了错误,或者公式是假的,因为结果如下:the application has requested the Runtime to terminate it in an unusual way.

感谢。

1 个答案:

答案 0 :(得分:0)

你不应该改变for循环的界限吗?

for(i=0; i < contours[0].size(); i++)
{ 
    contours_poly[0][i].x = contours_poly[0][i].x - mc[1].x;
    contours_poly[0][i].y = contours_poly[0][i].y - mc[1].y;
    contours_poly[1][i].x = contours_poly[1][i].x - mc[1].x;
    contours_poly[1][i].y = contours_poly[1][i].y - mc[1].y; 
}