public void Segmentation(
ref int head,
ref int tail
)
{
List <MacheteElement> current = dtw[currentIndex];
MacheteElement curr = current[current.Count - 1];
head = curr.startFrameNo - 1;
tail = curr.endFrameNo;
}
public void Update(
MacheteElement extendThis,
int frameNo,
double cost,
double length
)
{
startFrameNo = extendThis.startFrameNo;
endFrameNo = frameNo;
cost *= length;
this.runningScore = extendThis.runningScore + cost;
this.total = extendThis.total + length;
}
public void Update(
CircularBuffer <Vector> buffer,
Vector pt,
Vector nvec,
int frameNo,
double length
)
{
// Cache current row as prev
List <MacheteElement> previous = dtw[currentIndex];
// Update Circular Buffer Index
currentIndex++;
currentIndex %= 2;
// Cache reference to current row
List <MacheteElement> current = dtw[currentIndex];
// Update frame number
current[0].startFrameNo = frameNo;
for (int col = 1; col <= vectorCount; col++)
{
double dot = nvec.Dot(vectors[col - 1]);
double cost = 1.0 - Math.Max(-1.0, Math.Min(1.0, dot));
cost = cost * cost;
// Pick the lowest cost neightbor to
// extent it's warping path through
// this (frame_no, col) element.
MacheteElement n1 = current[col - 1];
MacheteElement n2 = previous[col - 1];
MacheteElement n3 = previous[col];
MacheteElement extend = n1;
double minimum = n1.GetNormalizedWarpingPathCost();
if (n2.GetNormalizedWarpingPathCost() < minimum)
{
extend = n2;
minimum = n2.GetNormalizedWarpingPathCost();
}
if (n3.GetNormalizedWarpingPathCost() < minimum)
{
extend = n3;
minimum = n3.GetNormalizedWarpingPathCost();
}
// Update the miniumum cost warping path
// Element to include this frame
current[col].Update(
extend,
frameNo,
cost,
length);
}
MacheteElement curr = current[vectorCount];
int startFrameNo = curr.startFrameNo;
int endFrameNo = curr.endFrameNo;
double durationFrameCount = endFrameNo - startFrameNo + 1;
double cf = 1.0f;
if (device_id == DeviceType.MOUSE)
{
double cf_closedness = 2.0;
double cf_f2l = 2.0;
if (durationFrameCount < buffer.Count() - 1)
{
// Get first to last vector
Vector vec = buffer[-1] - buffer[-(int)durationFrameCount];
double total = current[vectorCount].total;
double vlength = vec.L2Norm();
double closedness1 = vlength / total;
vec /= vlength;
// Closedness
cf_closedness = Math.Max(closedness1, closedness);
cf_closedness /= Math.Min(closedness1, closedness);
cf_closedness = 1 + weightClosedness * (cf_closedness - 1.0);
cf_closedness = Math.Min(2.0, cf_closedness);
// End direction
double f2l_dot = f2l_Vector.Dot(vec);
f2l_dot = 1.0 - Math.Max(-1.0, Math.Min(1.0, f2l_dot));
cf_f2l = 1.0 + (f2l_dot / 2.0) * weightF2l;
cf_f2l = Math.Min(2.0, cf_f2l);
cf = cf_closedness * cf_f2l;
}
}
double ret = curr.GetNormalizedWarpingPathCost();
if (durationFrameCount < minimumFrameCount)
{
cf *= 1000.0f;
}
trigger.Update(
frameNo,
ret,
cf,
curr.startFrameNo,
curr.endFrameNo);
double _t = trigger.GetThreshold();
result.Update(
ret * cf,
_t,
curr.startFrameNo,
curr.endFrameNo,
frameNo);
}
