Win10+vs2013+opencv建立简单的人脸检测工程

（1）新建一个项目，选择“空项目”

（2）添加cpp文件

（3）Cpp文件中代码为

#include <opencv2\opencv.hpp>

using namespace cv;

static CvMemStorage* storage = NULL;
static CvHaarClassifierCascade* cascade = NULL;
const char* cascadePath = "haarcascade_frontalface_alt_tree.xml";//xml文件在安装的opencv文件里，需复制到项目文件中

int main()
{
	CvCapture* cap = cvCreateCameraCapture(0);//初始化摄像头
	//初始化视频人脸检测
	IplImage* cameraImage = NULL;
	storage = cvCreateMemStorage(0);
	cascade = (CvHaarClassifierCascade*)cvLoad(cascadePath);

	while ((cameraImage = cvQueryFrame(cap)) != NULL)
	{
		cvWaitKey(1);//不加读取不到图像
		//图片灰度化
		IplImage* grayImage = cvCreateImage(cvSize(cameraImage->width, cameraImage->height), 8, 1);
		cvCvtColor(cameraImage, grayImage, CV_BGR2GRAY);
		//人脸目标检测
		cvClearMemStorage(storage);
		CvSeq* objects = cvHaarDetectObjects(grayImage, cascade, storage, 1.1, 2, 0, cvSize(30, 30));
		//人脸用方框绘出
		for (int i = 0; i < (objects ? objects->total : 0); i++)
		{
			CvRect* rect = (CvRect*)cvGetSeqElem(objects, i);
			cvRectangle(cameraImage, cvPoint(rect->x, rect->y),
				cvPoint(rect->x + rect->width, rect->y + rect->height), cvScalar(255, 0.0));
		}
		cvShowImage("videofacedete", cameraImage);
	}
	return 0;
}

（4）F5运行结果为