Question

在下面的代码中，我尝试检测面部和眼睛。来自视频。我的问题是我试图设置投资回报率来检测眼睛。但我认为cvSetImageROI函数有错误。

显示此错误

错误C2664：＆＃39; cvSetImageROI＆＃39; ：无法转换参数1来自＆＃39; cv :: Mat＆＃39;到了IplImage *＆＃39;

感谢您的帮助

#include<stdio.h>
#include<math.h>
#include<opencv\cv.h>
#include<opencv\highgui.h>
#include<opencv2\objdetect\objdetect.hpp>
#include<opencv2\highgui\highgui.hpp>
#include<opencv2\imgproc\imgproc.hpp>
#include<vector>

using namespace cv;
using namespace std;

 int main()
{
CascadeClassifier face_cascade, eye_cascade;
if(!face_cascade.load("haarcascade_frontalface_alt2.xml")) {
    printf("Error loading cascade file for face");
    return 1;
}
if(!eye_cascade.load("haarcascade_eye.xml")) {
    printf("Error loading cascade file for eye");
    return 1;
}
VideoCapture capture("w.mp4"); //-1, 0, 1 device id
if(!capture.isOpened())
{
    printf("error to initialize camera");
    return 1;
}
Mat cap_img,gray_img;
vector<Rect> faces, eyes;
while(1)
{
    capture >> cap_img;
    waitKey(10);
    cvtColor(cap_img, gray_img, CV_BGR2GRAY);
    cv::equalizeHist(gray_img,gray_img);
    face_cascade.detectMultiScale(gray_img, faces, 1.1, 10, CV_HAAR_SCALE_IMAGE | CV_HAAR_DO_CANNY_PRUNING, cvSize(0,0), cvSize(300,300));
    for(int i=0; i < faces.size();i++)
    {
        Point pt1(faces[i].x+faces[i].width, faces[i].y+faces[i].height);
        Point pt2(faces[i].x,faces[i].y);
        Mat faceROI = gray_img(faces[i]);
        cvSetImageROI(faceROI, cvRect(faces->x,faces->y + (faces->height)/5,faces->width, (faces->height)/3 );
        eye_cascade.detectMultiScale(faceROI, eyes, 1.1, 2, 0 | CV_HAAR_SCALE_IMAGE, Size(30,30));
        for(size_t j=0; j< eyes.size(); j++)
        {
            //Point center(faces[i].x+eyes[j].x+eyes[j].width*0.5, faces[i].y+eyes[j].y+eyes[j].height*0.5);
            Point center( faces[i].x + eyes[j].x + eyes[j].width*0.5, faces[i].y + eyes[j].y + eyes[j].height*0.5 );
            int radius = cvRound((eyes[j].width+eyes[j].height)*0.25);
            circle(cap_img, center, radius, Scalar(255,0,0), 2, 8, 0);
        }
        rectangle(cap_img, pt1, pt2, cvScalar(0,255,0), 2, 8, 0);
    }
    imshow("Result", cap_img);
    waitKey(3);
    char c = waitKey(3);
    if(c == 27)
        break;
}
return 0;
}

Answer 1

问题是你正在尝试使用旧的openCV方法。您的图片采用Mat格式，cvSetImageROI无法将Mat图片作为参数。

<强>建议：

Rect region_of_interest = Rect(x, y, w, h);
Mat image_roi = image(region_of_interest);

cvSetImageROI来检测眼睛

1 个答案: