findContours在opencv中找不到輪廓

我一直在嘗試從相機加載圖像，但是我遇到了一個錯誤。我認爲findContours函數有問題。下面是代碼：findContours在opencv中找不到輪廓

#include "opencv2/highgui/highgui.hpp" 
#include "opencv2/imgproc/imgproc.hpp" 
#include <iostream> 
#include <stdio.h> 
#include <stdlib.h> 

using namespace cv; 
using namespace std; 

Mat src; Mat src_gray; 
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 
    VideoCapture cap(1); 
    cap>>src; 

    /// 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); 

    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, 100, 100*2, 3); 
    /// Find contours 
    findContours(canny_output, contours, hierarchy, CV_RETR_TREE, CV_CHAIN_APPROX_SIMPLE, Point(0, 0)); 

    /// 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()); 
    } 

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

這裏是錯誤：

Critical error detected c0000374 ConsoleApplication8.exe has triggered a breakpoint.

我希望得到任何幫助。

來源

2016-08-02 Athena

你有兩臺相機連接到你的電腦？ – Sunreef

@Sunreef是的。有兩臺攝像機連接 – Athena

它在哪一行斷開？ – MoustafaS

我有同樣的問題（或至少類似的一個）與該功能。我無法修復它，所以我改用舊的C風格cvFindContours函數。我已經包含了一個示例函數，以至於我使用cvFindContours函數來清理blob圖像。這可能不是最快的解決方案，但它至少可以工作。

void filtBproject(Mat& Bproject){ 

    Scalar   color  = CV_RGB(255,255,255); // text color 
    IplImage*  BprojectIpl = &IplImage(Bproject); 
    CvMemStorage* storage  = cvCreateMemStorage(0); 
    CvSeq*   contours = 0; 
    int    numCont  = 0; 
    int    contAthresh = 45; 

    numCont= cvFindContours(BprojectIpl, storage, &contours, sizeof(CvContour), 
        CV_RETR_EXTERNAL, CV_CHAIN_APPROX_SIMPLE, cvPoint(0,0)); 

    cvSet(BprojectIpl, cvScalar(0,0,0)); 
    for(; contours != 0; contours = contours->h_next) 
     { 

      if ((cvContourArea(contours, CV_WHOLE_SEQ) > contAthresh)){ 
       cvDrawContours(BprojectIpl, contours, color, color, -1, CV_FILLED, 8); 
      } 
     } 
}

來源

2016-08-04 08:42:12

的異常可能在Canny調用.Canny只能採取單通道圖像作爲輸入被拋出，但你不似乎讓企圖使src_gray單通道cvtColor後調用（cvtColor總是給DST類型相同SRC鍵入除非指定）。這可能是問題findContours這也將只採取單通道8位圖像

來源

2016-08-02 19:11:50 hariprasad

findContours在opencv中找不到輪廓

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