私は輪郭を見つけるためにこのコーディングに関連してprobを持っています

Question

私はいくつかのサンプルコードを取ってそれをテストします.....私はこのコーディングでprobを持っている各contour.forの重心を検索したい。しなさい...事前のおかげで...私は、Visual StudioでWindowsプラットフォームを使用2008

#include <cv.h> 
#include <highgui.h> 
#include <iostream> 
#include <stdio.h> 
#include <stdlib.h> 

using namespace cv; 
using namespace std; 

Mat src; 
Mat src_gray; 
int thresh = 100; 
int max_thresh = 255; 
RNG rng(12345); 

/// Function header 
void thresh_callback(int, void*); 

/** @function main */ 
int main(int argc, char** argv) 
{ 
    /// Load source image and convert it to gray 
    IplImage* src = cvLoadImage("TEST2.jpg"); 

    /// Convert image to gray and blur it 
    cvtColor(src, src_gray, CV_BGR2GRAY); 
    blur(src_gray, src_gray, Size(3,3)); 

    /// Create Window 
    char* source_window = "Source"; 
    namedWindow(source_window, CV_WINDOW_AUTOSIZE); 
    imshow(source_window, src); 

    createTrackbar("Canny thresh:","Source", &thresh, max_thresh, thresh_callback); 
    thresh_callback(0,0); 

    waitKey(0); 
    return(0); 
} 

/** @function thresh_callback */ 
void thresh_callback(int, void*) 
{ 
    Mat canny_output; 
    vector<vector<Point>> contours; 
    vector<Vec4i> hierarchy; 

    /// Detect edges using canny 
    Canny(src_gray, canny_output, thresh,thresh*2,3); 
    /// Find contours 
    findContours(canny_output, contours, hierarchy, CV_RETR_TREE, CV_CHAIN_APPROX_SIMPLE, Point(0, 0)); 

    /// Get the moments 
    vector<Moments> mu(contours.size()); 
    for(int i = 0; i < contours.size(); i++) 
    { 
    mu[i] = moments(contours[i], false); 
    } 

    /// Get the mass centers: 
    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); 
    } 

    /// Draw contours 
    Mat drawing = Mat::zeros(canny_output.size(), CV_8UC3); 
    for(int i = 0; i< contours.size(); i++) 
    { 
     Scalar color = Scalar(rng.uniform(0, 255), rng.uniform(0,255), rng.uniform(0,255)); 
     drawContours(drawing, contours, i, color, 2, 8, hierarchy, 0, Point()); 
     circle(drawing, mc[i], 4, color, -1, 8, 0); 
    } 

    /// Show in a window 
    namedWindow("Contours", CV_WINDOW_AUTOSIZE); 
    imshow("Contours", drawing); 

    /// Calculate the area with the moments 00 and compare with the result of the OpenCV function 
    printf("\t Info: Area and Contour Length \n"); 
    for(int i = 0; i< contours.size(); i++) 
    { 
     printf(" * Contour[%d] - Area (M_00) = %.2f - Area OpenCV: %.2f - Length: %.2f \n", i, mu[i].m00, contourArea(contours[i]), arcLength(contours[i], true)); 
     Scalar color = Scalar(rng.uniform(0, 255), rng.uniform(0,255), rng.uniform(0,255)); 
     drawContours(drawing, contours, i, color, 2, 8, hierarchy, 0, Point()); 
     circle(drawing, mc[i], 4, color, -1, 8, 0); 
    } 



} 

エラーリク...私のために、この非常に便利な...私はそれを解決するのに役立つ

Error 2 error C2664: 'cv::moments' : cannot convert parameter 1 from 'std::vector<_Ty>' to 'const cv::Mat &' d:\aranga_try\new_opencv\new_opencv\auto_focustest.cpp 57 New_opencv 
    Error 8 error C2664: 'cv::contourArea' : cannot convert parameter 1 from 'std::vector<_Ty>' to 'const cv::Mat &' d:\aranga_try\new_opencv\new_opencv\auto_focustest.cpp 84 New_opencv 
    Error 9 error C2664: 'cv::arcLength' : cannot convert parameter 1 from 'std::vector<_Ty>' to 'const cv::Mat &' d:\aranga_try\new_opencv\new_opencv\auto_focustest.cpp 84 New_opencv 

Answer 1

std::vector<cv::Point>をcv::Matに明示的に変換する必要があります。

template<typename _Tp> explicit Mat(const vector<_Tp>& vec, bool copyData=false); 

行列を取得すると、モーメント、面積、または周囲を計算できます。たとえば、面積を計算する：

double area = cv::contourArea(cv::Mat(contours[i], false));