private void buscarrosto(Bitmap frame)
{
Image <Rgb, Byte> imageCV = new Image <Rgb, byte>(frame);
Emgu.CV.Mat mat = imageCV.Mat;
var array = new byte[mat.Width * mat.Height * mat.ElementSize];
mat.CopyTo(array);
using (Array2D <RgbPixel> image = Dlib.LoadImageData <RgbPixel>(array, (uint)mat.Height, (uint)mat.Width, (uint)(mat.Width * mat.ElementSize)))
{
using (FrontalFaceDetector fd = Dlib.GetFrontalFaceDetector())
{
var faces = fd.Operator(image);
foreach (DlibDotNet.Rectangle face in faces)
{
FullObjectDetection shape = _ShapePredictor.Detect(image, face);
ChipDetails faceChipDetail = Dlib.GetFaceChipDetails(shape, 150, 0.25);
Array2D <RgbPixel> faceChip = Dlib.ExtractImageChip <RgbPixel>(image, faceChipDetail);
Bitmap bitmap1 = faceChip.ToBitmap <RgbPixel>();
MainWindow.main.Statusa1 = bitmap1;
Dlib.DrawRectangle(image, face, color: new RgbPixel(0, 255, 255), thickness: 4);
}
}
frame = image.ToBitmap <RgbPixel>();
MainWindow.main.Statusa = frame;
}
}
private static List <(OutputLabels <Matrix <float> >, Rectangle[])> GetData(List <Bitmap> bitmaps, bool isAFace = false)
{
var datas = new List <(OutputLabels <Matrix <float> >, Rectangle[])>();
try
{
foreach (var bitmap in bitmaps)
{
var faces = new List <Matrix <RgbPixel> >();
var dets = new Rectangle[0];
//在图像中寻找人脸我们需要一个人脸检测器:
using (var detector = Dlib.GetFrontalFaceDetector())
{
using (var img = bitmap.ToMatrix <RgbPixel>())
{
// 人脸 面积从大到小排序
dets = detector.Operator(img).OrderByDescending(x => x.Area).ToArray();
// 是否只检测面积最大的人脸
if (isAFace)
{
var shape = _SP.Detect(img, dets[0]);
var faceChipDetail = Dlib.GetFaceChipDetails(shape, 150, 0.25);
var faceChip = Dlib.ExtractImageChip <RgbPixel>(img, faceChipDetail);
faces.Add(faceChip);
}
else
{
foreach (var face in dets)
{
var shape = _SP.Detect(img, face);
var faceChipDetail = Dlib.GetFaceChipDetails(shape, 150, 0.25);
var faceChip = Dlib.ExtractImageChip <RgbPixel>(img, faceChipDetail);
faces.Add(faceChip);
}
}
if (!faces.Any())
{
datas.Add((null, null));
}
else
{
//此调用要求DNN将每个人脸图像转换为128D矢量。
//在这个128D的矢量空间中，来自同一个人的图像会彼此接近
//但是来自不同人的载体将会非常不同。所以我们可以用这些向量
//辨别一对图片是来自同一个人还是不同的人。
datas.Add((_NET.Operator(faces), dets));
}
}
}
}
}
catch (Exception ex)
{
LogHelperNLog.Error(ex);
}
return(datas);
}
private Bitmap ProcessImage(Bitmap image)
{
// set up Dlib facedetectors and shapedetectors
using (var fd = FrontalFaceDetector.GetFrontalFaceDetector())
using (var sp = new ShapePredictor("shape_predictor_68_face_landmarks.dat"))
{
// convert image to dlib format
var img = image.ToArray2D <RgbPixel>();
// detect faces
var faces = fd.Detect(img);
// detect facial landmarks
foreach (var rect in faces)
{
// detect facial landmarks
var shape = sp.Detect(img, rect);
// extract face chip
var chip = Dlib.GetFaceChipDetails(shape);
var thumbnail = Dlib.ExtractImageChips <RgbPixel>(img, chip);
// add picturebox
var box = new PictureBox()
{
Image = thumbnail.ToBitmap <RgbPixel>(),
SizeMode = PictureBoxSizeMode.Zoom,
Width = 62,
Height = 62
};
imagesPanel.Controls.Add(box);
// draw landmarks on main image
var lines = Dlib.RenderFaceDetections(new FullObjectDetection[] { shape });
foreach (var line in lines)
{
Dlib.DrawRectangle(
img,
new DlibDotNet.Rectangle(line.Point1),
new RgbPixel {
Green = 255
},
8);
}
}
return(img.ToBitmap <RgbPixel>());
}
}
public void GetImage(string imagePath)
{
Array2D <RgbPixel> image = Dlib.LoadImage <RgbPixel>(imagePath);
using (FrontalFaceDetector fd = Dlib.GetFrontalFaceDetector())
{
var faces = fd.Operator(image);
foreach (DlibDotNet.Rectangle face in faces)
{
FullObjectDetection shape = _ShapePredictor.Detect(image, face);
ChipDetails faceChipDetail = Dlib.GetFaceChipDetails(shape, 150, 0.25);
Array2D <RgbPixel> faceChip = Dlib.ExtractImageChip <RgbPixel>(image, faceChipDetail);
Bitmap bitmap1 = faceChip.ToBitmap <RgbPixel>();
MainWindow.main.Statusa1 = bitmap1;
Dlib.DrawRectangle(image, face, color: new RgbPixel(0, 255, 255), thickness: 4);
}
}
Bitmap frame = image.ToBitmap <RgbPixel>();
MainWindow.main.Statusa = frame;
}
private static void Preprocess(string type, string input, FrontalFaceDetector faceDetector, ShapePredictor posePredictor, string output)
{
var imageCount = 0;
var r = new ulong[Size * Size];
var g = new ulong[Size * Size];
var b = new ulong[Size * Size];
var csv = ReadCsv(Path.Combine(input, $"{type}.csv"));
var outputDir = Path.Combine(output, type);
foreach (var kvp in csv)
{
using (var tmp = Dlib.LoadImageAsMatrix <RgbPixel>(Path.Combine(input, type, kvp.Key)))
{
var dets = faceDetector.Operator(tmp);
if (!dets.Any())
{
Console.WriteLine($"Warning: Failed to detect face from '{kvp}'");
continue;
}
// Get max size rectangle. It could be better face.
var det = dets.Select((val, idx) => new { V = val, I = idx }).Aggregate((max, working) => (max.V.Area > working.V.Area) ? max : working).V;
using (var ret = posePredictor.Detect(tmp, det))
using (var chip = Dlib.GetFaceChipDetails(ret, Size, 0d))
using (var faceChips = Dlib.ExtractImageChip <RgbPixel>(tmp, chip))
{
var dst = Path.Combine(outputDir, kvp.Key);
var dstDir = Path.GetDirectoryName(dst);
Directory.CreateDirectory(dstDir);
Dlib.SaveJpeg(faceChips, Path.Combine(outputDir, kvp.Key), 100);
var index = 0;
for (var row = 0; row < Size; row++)
{
for (var col = 0; col < Size; col++)
{
var rgb = faceChips[row, col];
r[index] += rgb.Red;
g[index] += rgb.Green;
b[index] += rgb.Blue;
index++;
}
}
}
imageCount++;
}
}
using (var mean = new Matrix <RgbPixel>(Size, Size))
{
var index = 0;
for (var row = 0; row < Size; row++)
{
for (var col = 0; col < Size; col++)
{
var red = (double)r[index] / imageCount;
var green = (double)g[index] / imageCount;
var blue = (double)b[index] / imageCount;
var newRed = (byte)Math.Round(red);
var newGreen = (byte)Math.Round(green);
var newBlue = (byte)Math.Round(blue);
mean[row, col] = new RgbPixel(newRed, newGreen, newBlue);
index++;
}
}
Dlib.SaveBmp(mean, Path.Combine(output, $"{type}.mean.bmp"));
}
}
static void Main(string[] args)
{
/// FaceDetectionWith_API
Location[] coord = TestImage(fileName, Model.Hog);
/// Face DetectionWith_DLIB
using (var fd = Dlib.GetFrontalFaceDetector())
{
var img = Dlib.LoadImage <RgbPixel>(fileName);
// find all faces in the image
var faces = fd.Operator(img);
foreach (var face in faces)
{
// draw a rectangle for each face
Dlib.DrawRectangle(img, face, color: new RgbPixel(0, 255, 255), thickness: 4);
}
Dlib.SaveJpeg(img, outputName);
}
// The first thing we are going to do is load all our models. First, since we need to
// find faces in the image we will need a face detector:
using (var detector = Dlib.GetFrontalFaceDetector())
// We will also use a face landmarking model to align faces to a standard pose: (see face_landmark_detection_ex.cpp for an introduction)
using (var sp = ShapePredictor.Deserialize("shape_predictor_68_face_landmarks.dat"))
// And finally we load the DNN responsible for face recognition.
using (var net = DlibDotNet.Dnn.LossMetric.Deserialize("dlib_face_recognition_resnet_model_v1.dat"))
using (var img = Dlib.LoadImageAsMatrix <RgbPixel>(fileName))
using (var win = new ImageWindow(img))
{
var faces = new List <Matrix <RgbPixel> >();
foreach (var face in detector.Operator(img))
{
var shape = sp.Detect(img, face);
var faceChipDetail = Dlib.GetFaceChipDetails(shape, 150, 0.25);
var faceChip = Dlib.ExtractImageChip <RgbPixel>(img, faceChipDetail);
//faces.Add(move(face_chip));
faces.Add(faceChip);
win.AddOverlay(face);
}
if (!faces.Any())
{
Console.WriteLine("No faces found in image!");
return;
}
// This call asks the DNN to convert each face image in faces into a 128D vector.
// In this 128D vector space, images from the same person will be close to each other
// but vectors from different people will be far apart. So we can use these vectors to
// identify if a pair of images are from the same person or from different people.
var faceDescriptors = net.Operator(faces);
// In particular, one simple thing we can do is face clustering. This next bit of code
// creates a graph of connected faces and then uses the Chinese whispers graph clustering
// algorithm to identify how many people there are and which faces belong to whom.
var edges = new List <SamplePair>();
for (uint i = 0; i < faceDescriptors.Count; ++i)
{
for (var j = i; j < faceDescriptors.Count; ++j)
{
// Faces are connected in the graph if they are close enough. Here we check if
// the distance between two face descriptors is less than 0.6, which is the
// decision threshold the network was trained to use. Although you can
// certainly use any other threshold you find useful.
var diff = faceDescriptors[i] - faceDescriptors[j];
if (Dlib.Length(diff) < 0.6)
{
edges.Add(new SamplePair(i, j));
}
}
}
Dlib.ChineseWhispers(edges, 100, out var numClusters, out var labels);
// This will correctly indicate that there are 4 people in the image.
Console.WriteLine($"number of people found in the image: {numClusters}");
// Отобразим результат в ImageList
var winClusters = new List <ImageWindow>();
for (var i = 0; i < numClusters; i++)
{
winClusters.Add(new ImageWindow());
}
var tileImages = new List <Matrix <RgbPixel> >();
for (var clusterId = 0ul; clusterId < numClusters; ++clusterId)
{
var temp = new List <Matrix <RgbPixel> >();
for (var j = 0; j < labels.Length; ++j)
{
if (clusterId == labels[j])
{
temp.Add(faces[j]);
}
}
winClusters[(int)clusterId].Title = $"face cluster {clusterId}";
var tileImage = Dlib.TileImages(temp);
tileImages.Add(tileImage);
winClusters[(int)clusterId].SetImage(tileImage);
}
// Finally, let's print one of the face descriptors to the screen.
using (var trans = Dlib.Trans(faceDescriptors[0]))
{
Console.WriteLine($"face descriptor for one face: {trans}");
// It should also be noted that face recognition accuracy can be improved if jittering
// is used when creating face descriptors. In particular, to get 99.38% on the LFW
// benchmark you need to use the jitter_image() routine to compute the descriptors,
// like so:
var jitterImages = JitterImage(faces[0]).ToArray();
var ret = net.Operator(jitterImages);
using (var m = Dlib.Mat(ret))
using (var faceDescriptor = Dlib.Mean <float>(m))
using (var t = Dlib.Trans(faceDescriptor))
{
Console.WriteLine($"jittered face descriptor for one face: {t}");
// If you use the model without jittering, as we did when clustering the bald guys, it
// gets an accuracy of 99.13% on the LFW benchmark. So jittering makes the whole
// procedure a little more accurate but makes face descriptor calculation slower.
Console.WriteLine("hit enter to terminate");
Console.ReadKey();
foreach (var jitterImage in jitterImages)
{
jitterImage.Dispose();
}
foreach (var tileImage in tileImages)
{
tileImage.Dispose();
}
foreach (var edge in edges)
{
edge.Dispose();
}
foreach (var descriptor in faceDescriptors)
{
descriptor.Dispose();
}
foreach (var face in faces)
{
face.Dispose();
}
}
}
}
System.Console.ReadLine();
}
private void BackgroundWorkerOnDoWork(object sender, DoWorkEventArgs doWorkEventArgs)
{
var path = doWorkEventArgs.Argument as string;
if (string.IsNullOrWhiteSpace(path) || !File.Exists(path))
{
return;
}
using (var faceDetector = Dlib.GetFrontalFaceDetector())
using (var img = Dlib.LoadImage <RgbPixel>(path))
{
Dlib.PyramidUp(img);
var dets = faceDetector.Operator(img);
var shapes = new List <FullObjectDetection>();
foreach (var rect in dets)
{
var shape = this._ShapePredictor.Detect(img, rect);
if (shape.Parts <= 2)
{
continue;
}
shapes.Add(shape);
}
if (shapes.Any())
{
var lines = Dlib.RenderFaceDetections(shapes);
foreach (var line in lines)
{
Dlib.DrawLine(img, line.Point1, line.Point2, new RgbPixel
{
Green = 255
});
}
var wb = img.ToBitmap();
this.pictureBoxImage.Image?.Dispose();
this.pictureBoxImage.Image = wb;
foreach (var l in lines)
{
l.Dispose();
}
var chipLocations = Dlib.GetFaceChipDetails(shapes);
using (var faceChips = Dlib.ExtractImageChips <RgbPixel>(img, chipLocations))
using (var tileImage = Dlib.TileImages(faceChips))
{
// It is NOT necessary to re-convert WriteableBitmap to Matrix.
// This sample demonstrate converting managed image class to
// dlib class and vice versa.
using (var tile = tileImage.ToBitmap())
using (var mat = tile.ToMatrix <RgbPixel>())
{
var tile2 = mat.ToBitmap();
this.pictureBoxTileImage.Image?.Dispose();
this.pictureBoxTileImage.Image = tile2;
}
}
foreach (var c in chipLocations)
{
c.Dispose();
}
}
foreach (var s in shapes)
{
s.Dispose();
}
}
}
