OpenCV 人脸识别

OpenCV Face Detect.cpp

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

#include <iostream>
#include <stdio.h>

using namespace std;
using namespace cv;

string face_cascade_name = "haarcascade_frontalface_alt.xml";
CascadeClassifier face_cascade;

void detectAndDisplay(Mat frame);

int main(int argc, char** argv)
{
	Mat image = imread("face.png");

	if (!image.data)
	{
		printf("[ERR] 加载图片失败");
	}

	if (!face_cascade.load(face_cascade_name))
	{
		printf("[ERR] 无法加载级联分类器文件！\n");
	}

	detectAndDisplay(image);

	waitKey(0);
}

void detectAndDisplay(Mat frame)
{
	vector<Rect> faces;
	Mat frame_gray;

	cvtColor(frame, frame_gray, CV_BGR2GRAY);
	equalizeHist(frame_gray, frame_gray);

	face_cascade.detectMultiScale(frame_gray, faces, 1.1, 2, 0 | CV_HAAR_SCALE_IMAGE, Size(30, 30));

	for (int i = 0; i < faces.size(); i++)
	{
		Point center(faces[i].x + faces[i].width * .5, faces[i].y + faces[i].height * .5);
		ellipse(frame, center, Size(faces[i].width * .5, faces[i].height * .5), 0, 0, 360, Scalar(255, 0, 255), 4, 8, 0);
	}

	imshow("人脸识别", frame);
}