public FaceDetector(FaceDetectConfig config = null)
{
    this.DetectConfig = config ?? new FaceDetectConfig();
    _handle = ViewFaceNative.GetFaceDetectorHandler(this.DetectConfig.FaceSize
        , this.DetectConfig.Threshold
        , this.DetectConfig.MaxWidth
        , this.DetectConfig.MaxHeight
        , (int)this.DetectConfig.DeviceType);
    if (_handle == IntPtr.Zero)
    {
        throw new Exception("Get face detector handler failed.");
    }
}

public AntiSpoofingResult Predict(FaceImage image, FaceInfo info, FaceMarkPoint[] points)

static void AntiSpoofingDemo()
{
    using var bitmap = SKBitmap.Decode(imagePath0);

    using FaceDetector faceDetector = new FaceDetector();
    using FaceLandmarker faceMark = new FaceLandmarker();
    using FaceAntiSpoofing faceAntiSpoofing = new FaceAntiSpoofing();

    var info = faceDetector.Detect(bitmap).First();
    var markPoints = faceMark.Mark(bitmap, info);

    Stopwatch sw = Stopwatch.StartNew();
    sw.Start();

    var result = faceAntiSpoofing.Predict(bitmap, info, markPoints);
    Console.WriteLine($"活体检测，结果：{result.Status}，清晰度:{result.Clarity}，真实度：{result.Reality}，耗时：{sw.ElapsedMilliseconds}ms");

    sw.Stop();
    Console.WriteLine();
}

public AntiSpoofingResult AntiSpoofingVideo(FaceImage image, FaceInfo info, FaceMarkPoint[] points)

public FaceInfo[] Detect(FaceImage image)

using System;
using System.Drawing;
using System.Linq;
using ViewFaceCore;
using ViewFaceCore.Core;
using ViewFaceCore.Model;

namespace Demo
{
    internal class Program
    {
        private readonly static string imagePath = @"images/Jay_3.jpg";
        private readonly static string outputPath = @"images/Jay_out.jpg";

        static void Main(string[] args)
        {
            using var bitmap = (Bitmap)Image.FromFile(imagePath);
            using FaceDetector faceDetector = new FaceDetector();
            FaceInfo[] infos = faceDetector.Detect(bitmap);
            //输出人脸信息
            Console.WriteLine($"识别到的人脸数量：{infos.Length} 个人脸信息：\n");
            Console.WriteLine($"No.\t人脸置信度\t位置信息");
            for (int i = 0; i < infos.Length; i++)
            {
                Console.WriteLine($"{i}\t{infos[i].Score:f8}\t{infos[i].Location}");
            }
            //画方框，标记人脸
            using (Graphics g = Graphics.FromImage(bitmap))
            {
                g.DrawRectangles(new Pen(Color.Red, 4), infos.Select(p => new RectangleF(p.Location.X, p.Location.Y, p.Location.Width, p.Location.Height)).ToArray());
            }
            bitmap.Save(outputPath);
            Console.WriteLine($"输出图片已保存至：{outputPath}");
            Console.WriteLine();
        }
    }
}

public FaceMarkPoint[] Mark(FaceImage image, FaceInfo info) 

static void FaceMarkDemo()
{
    using var bitmap0 = SKBitmap.Decode(imagePath0);
    using var faceImage = bitmap0.ToFaceImage();
    using FaceDetector faceDetector = new FaceDetector();
    using FaceLandmarker faceMark = new FaceLandmarker();
    Stopwatch sw = new Stopwatch();

    var infos = faceDetector.Detect(faceImage);
    var markPoints = faceMark.Mark(faceImage, infos[0]);

    sw.Stop();
    Console.WriteLine($"识别到的关键点个数：{markPoints.Length}，耗时：{sw.ElapsedMilliseconds}ms");
    foreach (var item in markPoints)
    {
        Console.WriteLine($"X:{item.X}, Y:{item.Y}");
    }
    Console.WriteLine();
}

public float[] Extract(FaceImage image, FaceMarkPoint[] points)

public float Compare(float[] lfs, float[] rfs)

public bool IsSelf(float similarity)
或
public bool IsSelf(float[] lfs, float[] rfs)

static void FaceRecognizerDemo()
{
    Stopwatch sw = Stopwatch.StartNew();
    sw.Start();

    using var faceImage0 = SKBitmap.Decode(imagePath0).ToFaceImage();
    using var faceImage1 = SKBitmap.Decode(imagePath1).ToFaceImage();
    //检测人脸信息
    using FaceDetector faceDetector = new FaceDetector();
    FaceInfo[] infos0 = faceDetector.Detect(faceImage0);
    FaceInfo[] infos1 = faceDetector.Detect(faceImage1);
    //标记人脸位置
    using FaceLandmarker faceMark = new FaceLandmarker();
    FaceMarkPoint[] points0 = faceMark.Mark(faceImage0, infos0[0]);
    FaceMarkPoint[] points1 = faceMark.Mark(faceImage1, infos1[0]);
    //提取特征值
    using FaceRecognizer faceRecognizer = new FaceRecognizer();
    float[] data0 = faceRecognizer.Extract(faceImage0, points0);
    float[] data1 = faceRecognizer.Extract(faceImage1, points1);
    //对比特征值
    bool isSelf = faceRecognizer.IsSelf(data0, data1);

    Console.WriteLine($"识别到的人脸是否为同一人：{isSelf}，对比耗时：{sw.ElapsedMilliseconds}ms");
    Console.WriteLine();
    sw.Stop();
}

public FaceTrackInfo[] Track(FaceImage image)

public void Reset()

static void FaceTrackDemo()
{
    using var faceImage = SKBitmap.Decode(imagePath0).ToFaceImage();
    using FaceLandmarker faceMark = new FaceLandmarker();
    using FaceTracker faceTrack = new FaceTracker(new FaceTrackerConfig(faceImage.Width, faceImage.Height));
    var result = faceTrack.Track(faceImage);
    if (result == null || !result.Any())
    {
        Console.WriteLine("未追踪到任何人脸！");
        return;
    }
    foreach (var item in result)
    {
        FaceInfo faceInfo = item.ToFaceInfo();
        //标记人脸
        var points = faceMark.Mark(faceImage, faceInfo);
    }
}