c++ - OpenCv和Visual C++人脸检测

我目前正在尝试编写人脸检测程序，即使它能够成功构建，我似乎也有一点问题。关于如何解决这个问题的任何想法？下面指出了我调试和代码时出现的错误。

detect.cpp：

#include <opencv2/core.hpp>
#include <opencv2/highgui.hpp>
#include <opencv2/videoio.hpp>
#include <opencv2/objdetect.hpp>
#include <opencv2/imgproc.hpp>
#include <iostream>

using namespace cv;
using namespace std;


int main(int argc, char** argv)
{
    // capture from web camera init

    VideoCapture cap(0);
    cap.open(0);

    Mat img;

    // Initialize the inbuilt Harr Cascade frontal face detection
    // Below mention the path of where your haarcascade_frontalface_alt2.xml file is located

    CascadeClassifier face_cascade;
    face_cascade.load("C:\OpenCV\sources\data\haarcascades\haarcascade_frontalface_alt2.xml");
    // i tried changing this line to match my folder in C Drive

    for (;;)
    {

        // Image from camera to Mat

        cap >> img;

        // obtain input image from source
        cap.retrieve(img, CV_CAP_OPENNI_BGR_IMAGE);

        // Just resize input image if you want
        resize(img, img, Size(1000, 640));

        // Container of faces
        vector<Rect> faces;


        // Detect faces
        face_cascade.detectMultiScale(img, faces, 1.1, 2, 0 | CV_HAAR_SCALE_IMAGE, Size(140, 140));
        // error message appears here


        //Show the results
        // Draw circles on the detected faces

        for (int i = 0; i < faces.size(); i++)
        {
            Point center(faces[i].x + faces[i].width*0.5, faces[i].y + faces[i].height*0.5);
            ellipse(img, center, Size(faces[i].width*0.5, faces[i].height*0.5), 0, 0, 360, Scalar(255, 0, 255), 4, 8, 0);
        }

        // To draw rectangles around detected faces
        /* for (unsigned i = 0; i<faces.size(); i++)
        rectangle(img,faces[i], Scalar(255, 0, 0), 2, 1);*/


        imshow("wooohooo", img);
        int key2 = waitKey(20);

    }
    return 0;
}

错误信息：

Unhandled exception at 0x000007FEFD5CA06D in opencvTry.exe: Microsoft C++ exception: cv::Exception at memory location 0x000000000029EE10. occurred

最佳答案

在我一一查看代码后，我意识到导致错误的原因只是反斜杠。我在上面使用的代码是这样的：

face_cascade.load("C:\OpenCV\sources\data\haarcascades\haarcascade_frontalface_alt2.xml");

但实际上，应该是这样的：

face_cascade.load("C:/OpenCV/sources/data/haarcascades/haarcascade_frontalface_alt2.xml");

关于c++ - OpenCv和Visual C++人脸检测，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/45179908/