findContours在opencv中找不到轮廓

我一直在尝试从相机加载图像，但是我遇到了一个错误。我认为findContours函数有问题。下面是代码：findContours在opencv中找不到轮廓

#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); 
}

这里是错误：

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

我希望得到任何帮助。

来源

2016-08-02 Athena

你有两台相机连接到你的电脑？ – Sunreef

@Sunreef是的。有两台摄像机连接 – Athena

它在哪一行断开？ – MoustafaS

我有同样的问题（或至少类似的一个）与该功能。我无法修复它，所以我改用旧的C风格cvFindContours函数。我已经包含了一个示例函数，以至于我使用cvFindContours函数来清理blob图像。这可能不是最快的解决方案，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); 
      } 
     } 
}

来源

2016-08-04 08:42:12

的异常可能在Canny调用.Canny只能采取单通道图像作为输入被抛出，但你不似乎让企图使src_gray单通道cvtColor后调用（cvtColor总是给DST类型相同SRC键入除非指定）。这可能是问题findContours这也将只采取单通道8位图像

来源

2016-08-02 19:11:50 hariprasad

findContours在opencv中找不到轮廓

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