public void Initialize(Image <Gray, byte> initialFrame, IBoundingBox initialBb)
{
initialFrame.Integral(out _sum, out _squareSum);
initialBb.ScanningWindow = initialBb.CreateScanningWindow();
Service.SetIntegralImage(_sum);
Service.SetSquaredIntegralImage(_squareSum);
_initialVariance = Service.GetPatchVariance(initialBb);
_threshold = _thresholdCoefficient * _initialVariance;
_acceptedWindows = new List <int>(_scanningWindowGenerator.ScanningWindows.Length);
}
public IBoundingBox[] Generate(Size frameSize, IBoundingBox initialBb)
{
_frameSize = frameSize;
_initialBoundingBox = initialBb;
_windowsGenerated = true;
List <IBoundingBox> _scanningWindowsList = new List <IBoundingBox>();
// define minimum bounding box size
float minSideSize = Math.Min(initialBb.Size.Width, initialBb.Size.Height);
float ratio = minSideSize / _minSize;
Size minBbSize = new Size
(
(int)Math.Ceiling(initialBb.Size.Width / ratio),
(int)Math.Ceiling(initialBb.Size.Height / ratio)
);
// create bounding boxes
Size bbSize = minBbSize;
while (bbSize.Width <= frameSize.Width && bbSize.Height <= frameSize.Height)
{
// define x and y step
float xStep = bbSize.Width * _xRelStep;
float yStep = bbSize.Height * _yRelStep;
for (float bbCenterY = bbSize.Height / 2.0f - 0.5f; bbCenterY + bbSize.Height / 2.0f <= frameSize.Height - 0.5f; bbCenterY += yStep)
{
for (float bbCenterX = bbSize.Width / 2.0f - 0.5f; bbCenterX + bbSize.Width / 2.0f <= frameSize.Width - 0.5f; bbCenterX += xStep)
{
IBoundingBox bb = initialBb.CreateInstance(
new PointF(bbCenterX, bbCenterY),
bbSize
);
bb.ScanningWindow = bb.CreateScanningWindow();
_scanningWindowsList.Add(bb);
}
}
bbSize = new Size((int)(bbSize.Width * _scaleStep), (int)(bbSize.Height * _scaleStep));
}
_scanningWindows = _scanningWindowsList.ToArray();
return(_scanningWindows);
}