public static HandFrame zoomOnHand(short[] depthFrame, DepthFrameParams DFSettings, ObjectPoint handPos)
{
HandFrame HF = new HandFrame(DFSettings.Width, DFSettings.Height, handPos.X, handPos.Y, getRadiusFromHand(handPos.Depth));
// converts the 2d X and Y from output matrix to the 1d array Depth Image: DeptImgWidth*Y + X
// should have xShift and yShift incorporated??????
int startPoint = DFSettings.Width * Math.Max(1, (handPos.Y - HF.radius)) + Math.Max(1, handPos.X - HF.radius);
int endPoint = Math.Min(depthFrame.Length - 1, DFSettings.Width * (handPos.Y + HF.radius) + handPos.X + HF.radius);
int x = 0;
int y = 0;
for (int i = startPoint; i <= endPoint; i++)
{
// wraps the linear array to create the 2D Matrix
if (x >= HF.width)
{
i += DFSettings.Width - HF.width - 1;
x = 0;
y++;
continue;
}
depthFrame[i] = (short)(depthFrame[i] >> DFSettings.Bitmask);
// Kinect reports unknown values as -1 or 0
if (depthFrame[i] <= 0 || depthFrame[i] >= handPos.Depth + HF.radius)
{
depthFrame[i] = (short)(handPos.Depth + HF.radius);
}
HF.abs[y, x] = (short)(depthFrame[i]);
HF.dx[y, x] = threshold(depthFrame[i] - depthFrame[i - 1], FingerDetection.DetectionParameters.dxThreshold);
HF.dy[y, x] = threshold(depthFrame[i] - depthFrame[i - DFSettings.Width], FingerDetection.DetectionParameters.dyThreshold);
x++;
}
return(HF);
}
public static int updateFingersFromDepth(short[] depthFrame, DepthFrameParams DFP, HandPoint[] hands)
{
// Check left hand
if (hands[(int)HandPoint.HANDS.LEFT].tracked)
{
// Zoom on hand and get dx, dy
HandFrame HF = ProcessDepthImage.zoomOnHand(depthFrame, DFP, hands[(int)HandPoint.HANDS.LEFT]);
// Smooth dx, dy;
Convolution.seperableConv(DetectionParameters.seperableKernal, HF);
hands[(int)HandPoint.HANDS.LEFT].tracked = ParticleGradient(HF, hands[(int)HandPoint.HANDS.LEFT]);
}
// Check right hand
if (hands[(int)HandPoint.HANDS.RIGHT].tracked)
{
// Zoom on hand and get dx, dy
HandFrame HF = ProcessDepthImage.zoomOnHand(depthFrame, DFP, hands[(int)HandPoint.HANDS.RIGHT]);
// Smooth dx, dy;
Convolution.seperableConv(DetectionParameters.seperableKernal, HF);
hands[(int)HandPoint.HANDS.RIGHT].tracked = ParticleGradient(HF, hands[(int)HandPoint.HANDS.RIGHT]);
}
return(1);
}
