C++ OpenCV相片视频人脸识别统计人数

C++ OpenCV相片视频人脸识别统计人数

如需远程调试，可加QQ905733049由专业技术人员远程协助！

运行代码如下：

#include  
#include  
#include  

using namespace cv;
using namespace std;

CascadeClassifier faceCascade;

int num;
int main()
{
	faceCascade.load("haarcascade_frontalface_alt2.xml");

	Mat img = imread("a2.jpg");
	Mat imgGray;
	vector faces;


	if (img.empty())
	{
		return 1;
	}

	if (img.channels() == 3)
	{
		cvtColor(img, imgGray, CV_RGB2GRAY);
	}
	else
	{
		imgGray = img;
	}

	faceCascade.detectMultiScale(faces, 1.2, 6, 0, Size(0, 0));

	if (faces.size() > 0)
	{
		for (int i = 0; i < faces.size(); i++)
		{
			rectangle(Point(faces[i].x, faces[i].y), Point(faces[i].x + faces[i].width, faces[i].y + faces[i].height), Scalar(0, 255, 0), 3, 8);    // 框出人脸
			num++;
		}
	}

	string font = "Current number:";
	string font1 = "pcs";
	putText(img, font + to_string(num - 1) + font1, Point(30, 50), FONT_HERSHEY_TRIPLEX, 1.3, Scalar(26, 28, 124), 4);


	imshow("FacesOfPrettyGirl", img);

	waitKey(0);
	return 0;
}

运行结果：