我正在使用此代码* 当用户将手伸向相机时,提取手指 * s。从手中提取手指
插入这些行以查找凸面后,正在抛出以下错误。
if (contours[i].size() >3)
{
cout<<"inside"<<endl;
convexityDefects(contours[i], hull[i], defects[i]);
}
和错误是:
内部 OpenCV的错误:断言失败(hull.checkVector(1,CV_32S)> 2)在convexityDefects,文件C:/从/建立/ WinInstallerMegaPack/src/opencv/modules/imgproc/src/contours.cpp,line 1971
此应用程序已经请求运行时以不寻常的方式终止它。 有关更多信息,请联系应用程序的支持团队。 ():C:/slave/builds/WinInstallerMegaPack/src/opencv/modules/imgproc/src/contours.cpp:1971:error:( - 215) hull.checkVector(1,CV_32S)> 2在函数凸性缺陷
任何人都可以帮我解决这个问题吗?
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 thresh = 147;
int max_thresh = 255;
RNG rng(12345);
/// Function header
void thresh_callback(int, void*);
/** @function main */
int main(int argc, char** argv)
{
src = imread("D:\\a.jpg", 1);
/// Convert image to gray and blur it
resize(src,src,Size(640,480),0,0,INTER_LINEAR);
cvtColor(src, src_gray, CV_BGR2GRAY);
blur(src_gray, src_gray, Size(3,3));
/// Create Window
char* source_window = "Knuckle Extractor";
namedWindow(source_window, CV_WINDOW_AUTOSIZE);
imshow(source_window, src);
// createTrackbar(" Threshold:", source_window, &thresh, max_thresh, thresh_callback);
thresh_callback(0, 0);
waitKey(0);
return(0);
}
/** @function thresh_callback */
void thresh_callback(int, void*)
{
Mat src_copy = src.clone();
Mat threshold_output;
vector<vector<Point> > contours;
vector<Vec4i> hierarchy;
/// Detect edges using Threshold
threshold(src_gray, threshold_output, thresh, 255, THRESH_BINARY||CV_THRESH_OTSU);
// imshow("Grey",src_gray);
imshow("Threshold",threshold_output);
/// Find contours
// findContours(threshold_output, contours, hierarchy, CV_RETR_TREE, CV_CHAIN_APPROX_SIMPLE, Point(0, 0));
//findContours(threshold_output, contours, hierarchy, CV_RETR_EXTERNAL, CV_CHAIN_APPROX_NONE, Point(0, 0));
findContours(threshold_output, contours, hierarchy, CV_RETR_EXTERNAL, CV_CHAIN_APPROX_SIMPLE, Point(0, 0));
/// Find the convex hull object for each contour
vector<vector<Point> >hull(contours.size());
vector<vector<Vec4i> >defects(contours.size());
for(int i = 0; i < contours.size(); i++)
{
convexHull(Mat(contours[i]), hull[i], false);
if (contours[i].size() >3)
{
cout<<"inside"<<endl;
convexityDefects(contours[i], hull[i], defects[i]);
}
}
/// Draw contours + hull results
Mat drawing = Mat::zeros(threshold_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, 1, 8, vector<Vec4i>(), 0, Point());
drawContours(drawing, hull, i, color, 1, 8, vector<Vec4i>(), 0, Point());
}
/// Show in a window
namedWindow("Result", CV_WINDOW_AUTOSIZE);
imshow("Result", drawing);
}
谢谢罗杰的回应。我按照你的建议修改了代码,现在我在drawContours文件C中得到了“OpenCV错误:声明失败(npoints> 0)C:/slave/builds/WinInstallerMegaPack/src/opencv/modules/imgproc/src/contours.cpp,line 1821 该应用程序已经请求运行时以一种不寻常的方式终止它。请联系应用程序的支持团队获取更多信息。在抛出'cv :: Exception'实例后终止调用what():C:/ slave/builds/WinInstallerMegaPack/src/opencv/modules/imgproc/src/contours.cpp:1821:error:(-215)npoints> 0在函数drawContours' – user2881263
但是这一次,for循环迭代了两次。 – user2881263
@ user2881263是的,这就是一个常见的问题是''convexityDefects''需要索引,而'drawContours'需要点。一个快速解决方法是提取两个 - 使用凸起缺陷的索引和绘制点,你只需要调用'convexHull'两次(一个用于每种类型的输出)。 –