我一直试图从相机加载图像,但我遇到了错误。我相信findContours
函数有问题。这是代码:
#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 );
}
这是错误:
检测到严重错误c0000374 ConsoleApplication8.exe已触发断点。
我将不胜感激。
答案 0 :(得分:1)
我遇到了与该功能相同的问题(或者至少是类似问题)。我无法解决它,所以我使用了旧的C风格的cvFindContours函数。我已经包含了一个示例函数,我使用了cvFindContours函数来清理blob图像。这可能不是最快的解决方案,但是它很有效。
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 );
}
}
}
答案 1 :(得分:0)
可能会在Canny
调用时抛出异常.Canny只能将单通道图像作为输入,但您似乎没有尝试在{{1}之后将src_gray
作为单个通道调用(cvtColor总是给dst类型与src类型相同,除非指定)。这可能是cvtColor
的问题,它也只会采用单通道8位图像