实现人脸识别的方法：利用Golang与OpenCV库

go get -u gocv.io/x/gocv

package mainimport ("fmt""image""image/color""log""gocv.io/x/gocv")func main() {// 打开摄像头webcam, err := gocv.VideoCaptureDevice(0)if err != nil {log.Fatalf("Error opening webcam: %v", err)}defer webcam.Close()// 加载人脸分类器classifier := gocv.NewCascadeClassifier()defer classifier.Close()if !classifier.Load("haarcascade_frontalface_default.xml") {log.Fatalf("Error reading cascade file: haarcascade_frontalface_default.xml")}// 打开窗口以显示视频window := gocv.NewWindow("Face Detect")defer window.Close()// 创建一个图像矩阵以保存帧img := gocv.NewMat()defer img.Close()fmt.Printf("Press ESC to stop\n")for {if ok := webcam.Read(&img); !ok {fmt.Printf("Device closed\n")return}if img.Empty() {continue}// 转换图像为灰度gray := gocv.NewMat()defer gray.Close()gocv.CvtColor(img, &gray, gocv.ColorBGRToGray)// 探测人脸rects := classifier.DetectMultiScale(gray)for _, r := range rects {// 在原图上画矩形gocv.Rectangle(&img, r, color.RGBA{0, 255, 0, 0}, 3)}// 显示图像window.IMShow(img)if window.WaitKey(1) == 27 {break}}}