本文介绍了找到一个图像轮廓重心的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我试图来计算，像这样的图像质心：
I am trying to calculate an image centroid like so:
// Calculate centroid
double signedArea = 0.0;
sskp_point centroid;
for(int i=0;i<numPoints;i++)
{
double a = (points[i].x*points[(i+1)%numPoints].y)-(points[(i+1)%numPoints].x*points[i].y);
signedArea += a;
centroid.x += (points[i].x*points[(i+1)%numPoints].x)*a;
centroid.y += (points[i].y*points[(i+1)%numPoints].y)*a;
printf("points[%d] = { %f, %f }\n",i,points[i].x,points[i].y);
}
signedArea /= 2.0;
centroid.x /= (6*signedArea);
centroid.y /= (6*signedArea);
printf("centroid = { %f, %f }\n",centroid.x,centroid.y);
我从这里算法的，谁能告诉我什么是错与此相适应？
I have adapted this from the algorithm here, however it is giving me the wrong results, can anyone tell me what is wrong with this adaptation?
推荐答案
您已经写了 centroid.x + =（分[I] .X *点[（I + 1）％为NumPoints]。 X）* A;
相反，它应该是 centroid.x + =（分[I] .X +点[（I + 1）％为NumPoints] .X）* A;
必须更换 * 与 + 在这里。
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