《cv中文参考手册-图像轮廓处理-结构分析与形状识别-获取各个对象的质心》HuMoments

itc= contours.begin();

while (itc!=contours.end()) {

// compute all moments

cv::Moments mom=cv::moments(cv::Mat(*itc++));

// draw mass center

cv::circle(result,

// position of mass center converted tointeger

cv::Point(mom.m10/mom.m00,mom.m01/mom.m00),

2,cv::Scalar(0),2); // draw black dot

}

Calculates all of the moments up to thethird order of a polygon or rasterized shape.

C++: Moments moments(InputArray array,bool binaryImage=false )

 

Python: cv2.moments(array[, binaryImage]) → retval

 

C: void cvMoments(constCvArr* arr, CvMoments* moments, int binary=0 )

Parameters:

array – Raster image (single-channel, 8-bit or floating-point 2D array) or an array (  or  ) of 2D points (Point or Point2f ). binaryImage – If it is true, all non-zero image pixels are treated as 1’s. The parameter is used for images only. moments – Output moments.

The function computes moments, up to the3rd order, of a vector shape or a rasterized shape. The results are returned inthe structure Moments defined as: