program.cs

人脸检测示例程序(需要OpenCV.Net)

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Xml;
using System.Xml.XPath;
using System.Xml.Linq;

using openCV.Net;
using openCV.Net.Haar;
namespace openCV.NetTest
{
    class Program
    {
        const float scale = 1.3f;
        const string filename = @"Cascades\haarcascade_frontalface_alt2.xml";
        const string yaleDbDir = @"YaleDb";
        const string pgmExt = "*.pgm";

        static HaarClassifierCascade haarClassifierCascade;

        static void Main(string[] args)
        {
            haarClassifierCascade = HaarClassifierCascade.Parse(XDocument.Load(filename));
                        
            foreach (var x in Directory.GetFiles(yaleDbDir, pgmExt))
                DetectAndDraw(PGMDecoder.Parse(x));
        }

        static void DetectAndDraw(Bitmap image)
        {            
            Stopwatch stopwatch = Stopwatch.StartNew();
            Sequence<AvgComp> faces = FaceDetector.DetectFaces(image, haarClassifierCascade);
            stopwatch.Stop();
            
            using (Graphics g = Graphics.FromImage(image))
            {
                for (int i = 0; i < faces.Count; i++)
                {
                    Rectangle r = faces.ElementAt(i).Rectangle;
                    g.DrawEllipse(Pens.Firebrick, r.X * scale, r.Y * scale, r.Width * scale, r.Height * scale);
                }
                g.Save();
            }

            new PictureForm(image, stopwatch.Elapsed).ShowDialog();
        }
    }
}