/// <summary>
/// Run over directory, get images, detech faces, resize and storeagain
/// </summary>
/// <param name="directory"></param>
public static void CreateTrainingSet(String mainDirectory, int newSize, bool equalize, int rotation, bool flip)
{
string[] subdirEntries = Directory.GetDirectories(mainDirectory);
foreach (var directory in subdirEntries)
{
string[] fileEntries = Directory.GetFiles(directory);
foreach (var file in fileEntries.Where(x => (!x.Contains("_"))))
{
Image <Gray, byte> image = new Image <Gray, byte>(file);
//the images are big - reduce the size to the half
image = image.Resize(0.5, INTER.CV_INTER_CUBIC);
var haar = new HaarCascade(FileAccessUtil.GetHaarCascade());
var faces = haar.Detect(image);
if (faces.Count() == 1)
{
var face = faces[0];
//resize all images to 100
var faceImg = image.Copy(face.rect).Resize(newSize, newSize, INTER.CV_INTER_CUBIC);
String imgName = file.Insert(file.IndexOf("."), "_" + newSize.ToString());
if (equalize)
{
imgName = imgName.Insert(file.IndexOf("."), "_N");
var equalized = EqualizeHist(faceImg);
faceImg = equalized;
}
faceImg.Save(imgName);
//create rotated image if it was demanded
if (rotation != 0)
{
var rotated = faceImg.Rotate(rotation, new Gray(0.3));
var rotatedName = imgName.Insert(file.IndexOf("."), "_R");
rotated.Save(rotatedName);
}
if (flip)
{
var fliped = faceImg.Flip(FLIP.HORIZONTAL);
var flipedName = imgName.Insert(file.IndexOf("."), "_F");
fliped.Save(flipedName);
}
}
}
}
}
public static Image <Gray, byte> DetectAndTrimFace(int[] pixels, int initialSize, int outputSize)
{
var inBitmap = ConvertToBitmap(pixels, initialSize);
//inBitmap.Save(@"E:\data\phototest\received.bmp");
var grayframe = new Image <Gray, byte>(inBitmap);
var haar = new HaarCascade(FileAccessUtil.GetHaarCascade());
var faces = haar.Detect(grayframe,
1.2,
3,
HAAR_DETECTION_TYPE.DO_CANNY_PRUNING,
new Size(30, 30));
if (faces.Count() != 1)
{
return(null);
}
var face = faces[0];
var returnImage = grayframe.Copy(face.rect).Resize(outputSize, outputSize, INTER.CV_INTER_CUBIC);
return(returnImage);
}