opencv： partition应用

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//距离小于10的点归为一类

bool _EqPredicate(const Point& a, const Point& b)

{
return ((b.y-a.y)*(b.y-a.y)+(b.x-a.x)*(b.x-a.x)<10*10);
}

void ClusteringPartition()
{
Mat img(500, 500, CV_8UC3);

RNG rng(12345);

vector<Point> points;
vector<int> labels;
int sampleCount=6;

points.push_back(Point(200,200));
points.push_back(Point(200,215));
points.push_back(Point(205,200));

points.push_back(Point(400,200));
points.push_back(Point(400,205));
points.push_back(Point(405,200));

randShuffle(points, 1, &rng);

long count=partition(points, labels,_EqPredicate);

OutInfo("count",count);

img = Scalar::all(0);

for( int i = 0; i < sampleCount; i++ )
{
Point ipt = points.at(i);
circle( img, ipt, 2, CV_RGB(255,255,255), 1, LINE_AA );
}
imshow("points", img);

img = Scalar::all(0);

for( int i = 0; i < sampleCount; i++ )
{
int Idx = labels.at(i)+1;
Point ipt = points.at(i);
circle( img, ipt, 2, CV_RGB(Idx*100%255,0,0), FILLED, LINE_AA );
}

imshow("partition", img);

}

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