#include <iostream>
#include <opencv2/opencv.hpp>
using namespace std;
using namespace cv;
Mat img1, img2, img3, img4, img_result, img_gray1, img_gray2, img_gray3, img_canny1;
char win1[] = "window1";
char win2[] = "window2";
char win3[] = "window3";
char win4[] = "window4";
char win5[] = "window5";
int thread_value = 100;
int max_value = 255;
RNG rng1(12345);
int Demo_Moments();
void Demo_1(int, void*);
//图像矩
int Demo_Moments()
{
namedWindow(win1, CV_WINDOW_AUTOSIZE);
namedWindow(win2, CV_WINDOW_AUTOSIZE);
//namedWindow(win3, CV_WINDOW_AUTOSIZE);
img1 = imread("D://images//19.png");
//img2 = imread("D://images//1//p5_1.jpg");
if (img1.empty())
{
cout << "could not load image..." << endl;
return 0;
}
imshow(win1, img1);
//img4 = Mat::zeros(img1.size(), CV_8UC3);
//转灰度图
cvtColor(img1, img_gray1, CV_BGR2GRAY);
//模糊处理
//blur(img_gray1, img2, Size(3, 3), Point(-1, -1), BORDER_DEFAULT);
GaussianBlur(img1, img2, Size(3, 3), 0, 0);
createTrackbar("track", win1, &thread_value, max_value, Demo_1);
Demo_1(0, 0);
return 0;
}
void Demo_1(int, void*)
{
vector<vector<Point>> vec_p;
vector<Vec4i> vec_4i;
img4 = Mat::zeros(img1.size(), CV_8UC3);
//threshold(img2, img3, thread_value, max_value, THRESH_BINARY);
Canny(img2, img3, thread_value, thread_value * 2, 3, false);
findContours(img3, vec_p, vec_4i, RETR_TREE, CHAIN_APPROX_SIMPLE, Point(0, 0));
//vector<vector<Point>> convexs(vec_p.size());
vector<Moments> contours_moments(vec_p.size());
vector<Point2f> ccs(vec_p.size());
for (size_t i = 0; i<vec_p.size(); i++)
{
contours_moments[i] = moments(vec_p[i]);
ccs[i] = Point(static_cast<float>(contours_moments[i].m10/contours_moments[i].m00),static_cast<float>(contours_moments[i].m01/contours_moments[i].m00));
}
for (size_t j = 0; j<vec_p.size(); j++)
{
if (vec_p[j].size() <100)
{
continue;
}
Scalar color_1 = Scalar(rng1.uniform(0, 255), rng1.uniform(0, 255), rng1.uniform(0, 255));
printf("center point x : %.2f y : %.2f\n", ccs[j].x, ccs[j].y);
printf("contours %d area : %.2f arc length : %.2f\n", j, contourArea(vec_p[j]), arcLength(vec_p[j], true));
drawContours(img4, vec_p, j, color_1, 2, LINE_8, vec_4i, 0, Point(0, 0));
circle(img4,ccs[j],2,color_1,2,8);
}
imshow(win2, img4);
}
int main()
{
Demo_Moments();
waitKey(0);
return 0;
}
--------------------------------------------------------------------------
center point x : 627.00 y : 607.00
contours 5 area : 68.00 arc length : 498.84
center point x : 534.00 y : 609.00
contours 7 area : 41.50 arc length : 300.15
center point x : 691.00 y : 611.00
contours 8 area : 20.00 arc length : 207.97
center point x : 896.00 y : 570.00
contours 10 area : 56.00 arc length : 478.90
center point x : 880.00 y : 479.00
contours 11 area : 103.00 arc length : 691.15
center point x : 721.00 y : 427.00
contours 12 area : 26.50 arc length : 320.84
center point x : 411.00 y : 364.00
contours 16 area : 32.50 arc length : 333.81
center point x : 282.00 y : 362.00
contours 18 area : 53.50 arc length : 543.83
center point x : 334.00 y : 439.00
contours 19 area : 150.50 arc length : 1344.58
center point x : 606.00 y : 397.00
contours 21 area : 38.50 arc length : 389.95
center point x : 1017.00 y : 425.00
contours 23 area : 88.50 arc length : 742.42
center point x : 1088.00 y : 352.00
contours 27 area : 46.50 arc length : 380.23
center point x : 723.00 y : 416.00
contours 37 area : 119.50 arc length : 1088.67
center point x : 851.00 y : 268.00
contours 40 area : 26.50 arc length : 361.46
center point x : 96.00 y : 336.00
contours 43 area : 63.00 arc length : 541.73
center point x : 739.00 y : 255.00
contours 47 area : 46.00 arc length : 432.82
center point x : 806.00 y : 253.00
contours 53 area : 56.50 arc length : 310.58
center point x : 556.00 y : 318.00
contours 56 area : 58.50 arc length : 492.17
center point x : 100.00 y : 186.00
contours 63 area : 12.50 arc length : 163.78
center point x : 552.00 y : 193.00
contours 65 area : 32.50 arc length : 318.49
center point x : 420.00 y : 199.00
contours 66 area : 44.50 arc length : 372.09
center point x : 400.00 y : 242.00
contours 67 area : 61.00 arc length : 519.73
center point x : 735.00 y : 187.00
contours 71 area : 50.50 arc length : 246.63
center point x : 350.00 y : 114.00
contours 75 area : 31.50 arc length : 267.52
center point x : 202.00 y : 184.00
contours 77 area : 83.50 arc length : 604.34
center point x : 299.00 y : 153.00
contours 79 area : 139.50 arc length : 1052.33
center point x : 761.00 y : 126.00
contours 83 area : 15.50 arc length : 298.55
center point x : 983.00 y : 66.00
contours 85 area : 51.50 arc length : 433.06
center point x : 533.00 y : 129.00
contours 86 area : 58.00 arc length : 515.19
center point x : 533.00 y : 143.00
contours 88 area : 79.50 arc length : 3004.34
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原文地址：https://www.cnblogs.com/herd/p/9737878.html