[C#][原创]利用OpencvSharp轻松完成人脸检测

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using OpenCvSharp;

namespace opencv人脸检测
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Button1_Click(object sender, EventArgs e)
        {
            string xmlFileName= Application.StartupPath+"\\haarcascade_frontalface_alt.xml";//这个可以在Github下载
            string imageFileName= Application.StartupPath + "\\tt.jpg";
            OpenCvSharp.CascadeClassifier cascadeClassifier = new CascadeClassifier(xmlFileName);
            Mat image = Cv2.ImRead(imageFileName);
           Rect[] rect= cascadeClassifier.DetectMultiScale(image);
            pictureBox1.Image = DrawRect(imageFileName,rect);
        }

        public Bitmap DrawRect(string imageFileName,Rect[] rect)
        {
            Bitmap bmp = new Bitmap(imageFileName);
            Graphics g = Graphics.FromImage(bmp);
            for(int i=0;i             {
                g.DrawRectangle(new Pen(Color.Red,3),rect[i].Left,rect[i].Top,rect[i].Width,rect[i].Height);
            }
            g.Dispose();
            return bmp;
        }
    }
}

结果：