/**
* Make a deep copy of another Gesture object.
*
* @param original Another Gesture object
*/
public Gesture(Gesture original)
{
this.data = new List<AccelerationVector>();
var origin = original.getData();
for (int i = 0; i < origin.Count; i++)
{
this.add((AccelerationVector)origin[i]);
}
}
/**
* Make a deep copy of another Gesture object.
*
* @param original Another Gesture object
*/
public Gesture(Gesture original)
{
this.data = new List <AccelerationVector>();
var origin = original.getData();
for (int i = 0; i < origin.Count; i++)
{
this.add((AccelerationVector)origin[i]);
}
}
/**
* This methods looks up a Gesture to a group matrix, used by the
* k-mean-algorithm (traincenteroid method) above.
*
* @param gesture
* the gesture
*/
private int[,] deriveGroups(Gesture gesture)
{
List <AccelerationVector> data = gesture.getData();
int[,] groups = new int[this.map.Length, data.Count];
// Calculate cartesian distance
double[,] d = new double[this.map.Length, data.Count];
double[] curr = new double[3];
double[] vector = new double[3];
for (int i = 0; i < this.map.Length; i++)
{ // lines
var line = this.map[i];
for (var j = 0; j < data.Count; j++)
{ // split
var accel = data[j];
curr[0] = accel.X;
curr[1] = accel.Y;
curr[2] = accel.Z;
vector[0] = line[0] - curr[0];
vector[1] = line[1] - curr[1];
vector[2] = line[2] - curr[2];
d[i, j] = Math.Sqrt((vector[0] * vector[0])
+ (vector[1] * vector[1]) + (vector[2] * vector[2]));
}
}
// look, to which group a value belongs
for (int j = 0; j < data.Count; j++)
{
double smallest = Double.MaxValue;
int row = 0;
for (int i = 0; i < this.map.GetLength(0); i++)
{
if (d[i, j] < smallest)
{
smallest = d[i, j];
row = i;
}
groups[i, j] = 0;
}
groups[row, j] = 1; // group set
}
return(groups);
}
/**
* Trains this Quantizer with a specific gesture. This means that the
* positions of the centeroids would adapt to this training gesture. In our
* case this would happen with a summarized virtual gesture, containing all
* the other gestures.
*
* @param gesture
* the summarized virtual gesture
*/
public void trainCenteroids(Gesture gesture)
{
List <AccelerationVector> data = gesture.getData();
double pi = Math.PI;
this.radius = (gesture.getMaxAcceleration() + gesture.getMinAcceleration()) / 2;
// x , z , y
if (!this.maptrained)
{
this.maptrained = true;
this.map[0] = new double[] { this.radius, 0.0, 0.0 };
this.map[1] = new double[] { Math.Cos(pi / 4) * this.radius, 0.0,
Math.Sin(pi / 4) * this.radius };
this.map[2] = new double[] { 0.0, 0.0, this.radius };
this.map[3] = new double[] { Math.Cos(pi * 3 / 4) * this.radius,
0.0, Math.Sin(pi * 3 / 4) * this.radius };
this.map[4] = new double[] { -this.radius, 0.0, 0.0 };
this.map[5] = new double[] { Math.Cos(pi * 5 / 4) * this.radius,
0.0, Math.Sin(pi * 5 / 4) * this.radius };
this.map[6] = new double[] { 0.0, 0.0, -this.radius };
this.map[7] = new double[] { Math.Cos(pi * 7 / 4) * this.radius,
0.0, Math.Sin(pi * 7 / 4) * this.radius };
this.map[8] = new double[] { 0.0, this.radius, 0.0 };
this.map[9] = new double[] { 0.0, Math.Cos(pi / 4) * this.radius,
Math.Sin(pi / 4) * this.radius };
this.map[10] = new double[] { 0.0,
Math.Cos(pi * 3 / 4) * this.radius,
Math.Sin(pi * 3 / 4) * this.radius };
this.map[11] = new double[] { 0.0, -this.radius, 0.0 };
this.map[12] = new double[] { 0.0,
Math.Cos(pi * 5 / 4) * this.radius,
Math.Sin(pi * 5 / 4) * this.radius };
this.map[13] = new double[] { 0.0,
Math.Cos(pi * 7 / 4) * this.radius,
Math.Sin(pi * 7 / 4) * this.radius };
}
int[,] g_alt = new int[this.map.Length, data.Count];
int[,] g = new int[this.map.Length, data.Count];
do
{
// Derive new Groups...
g_alt = this.copyarray(g);
g = this.deriveGroups(gesture);
// calculate new centeroids
for (int i = 0; i < this.map.GetLength(0); i++)
{
double zaehlerX = 0;
double zaehlerY = 0;
double zaehlerZ = 0;
int nenner = 0;
for (int j = 0; j < data.Count; j++)
{
if (g[i, j] == 1)
{
var e = data[j];
zaehlerX += e.X;
zaehlerY += e.Y;
zaehlerZ += e.Z;
nenner++;
}
}
if (nenner > 1) // nur wenn der nenner>0 oder >1??? ist muss
// was
// geaendert werden
// Log.write("Setze neuen Centeroid!");
{
this.map[i] = new double[] { (zaehlerX / (double)nenner),
(zaehlerY / (double)nenner),
(zaehlerZ / (double)nenner) };
// Log.write("Centeroid: "+i+": "+newcenteroid[0]+":"+newcenteroid[1]);
}
} // new centeroids
} while (!equalarrays(g_alt, g));
// Debug: Printout groups
/*
* for (int i = 0; i < n; i++) { for (int j = 0; j < this.data.Count;
* j++) { Log.write(g[i][j] + "|"); } Log.write(""); }
*/
}
/**
* This methods looks up a Gesture to a group matrix, used by the
* k-mean-algorithm (traincenteroid method) above.
*
* @param gesture
* the gesture
*/
private int[,] deriveGroups(Gesture gesture)
{
List<AccelerationVector> data = gesture.getData();
int[,] groups = new int[this.map.Length, data.Count];
// Calculate cartesian distance
double[,] d = new double[this.map.Length, data.Count];
double[] curr = new double[3];
double[] vector = new double[3];
for (int i = 0; i < this.map.Length; i++)
{ // lines
var line = this.map[i];
for (var j = 0; j < data.Count; j++)
{ // split
var accel = data[j];
curr[0] = accel.X;
curr[1] = accel.Y;
curr[2] = accel.Z;
vector[0] = line[0] - curr[0];
vector[1] = line[1] - curr[1];
vector[2] = line[2] - curr[2];
d[i,j] = Math.Sqrt((vector[0] * vector[0])
+ (vector[1] * vector[1]) + (vector[2] * vector[2]));
}
}
// look, to which group a value belongs
for (int j = 0; j < data.Count; j++)
{
double smallest = Double.MaxValue;
int row = 0;
for (int i = 0; i < this.map.GetLength(0); i++)
{
if (d[i, j] < smallest)
{
smallest = d[i, j];
row = i;
}
groups[i, j] = 0;
}
groups[row, j] = 1; // group set
}
return groups;
}
/**
* Trains this Quantizer with a specific gesture. This means that the
* positions of the centeroids would adapt to this training gesture. In our
* case this would happen with a summarized virtual gesture, containing all
* the other gestures.
*
* @param gesture
* the summarized virtual gesture
*/
public void trainCenteroids(Gesture gesture)
{
List<AccelerationVector> data = gesture.getData();
double pi = Math.PI;
this.radius = (gesture.getMaxAcceleration() + gesture.getMinAcceleration()) / 2;
// x , z , y
if (!this.maptrained) {
this.maptrained = true;
this.map[0] = new double[] { this.radius, 0.0, 0.0 };
this.map[1] = new double[] { Math.Cos(pi / 4) * this.radius, 0.0,
Math.Sin(pi / 4) * this.radius };
this.map[2] = new double[] { 0.0, 0.0, this.radius };
this.map[3] = new double[] { Math.Cos(pi * 3 / 4) * this.radius,
0.0, Math.Sin(pi * 3 / 4) * this.radius };
this.map[4] = new double[] { -this.radius, 0.0, 0.0 };
this.map[5] = new double[] { Math.Cos(pi * 5 / 4) * this.radius,
0.0, Math.Sin(pi * 5 / 4) * this.radius };
this.map[6] = new double[] { 0.0, 0.0, -this.radius };
this.map[7] = new double[] { Math.Cos(pi * 7 / 4) * this.radius,
0.0, Math.Sin(pi * 7 / 4) * this.radius };
this.map[8] = new double[] { 0.0, this.radius, 0.0 };
this.map[9] = new double[] { 0.0, Math.Cos(pi / 4) * this.radius,
Math.Sin(pi / 4) * this.radius };
this.map[10] = new double[] { 0.0,
Math.Cos(pi * 3 / 4) * this.radius,
Math.Sin(pi * 3 / 4) * this.radius };
this.map[11] = new double[] { 0.0, -this.radius, 0.0 };
this.map[12] = new double[] { 0.0,
Math.Cos(pi * 5 / 4) * this.radius,
Math.Sin(pi * 5 / 4) * this.radius };
this.map[13] = new double[] { 0.0,
Math.Cos(pi * 7 / 4) * this.radius,
Math.Sin(pi * 7 / 4) * this.radius };
}
int[,] g_alt = new int[this.map.Length, data.Count];
int[,] g = new int[this.map.Length, data.Count];
do {
// Derive new Groups...
g_alt = this.copyarray(g);
g = this.deriveGroups(gesture);
// calculate new centeroids
for (int i = 0; i < this.map.GetLength(0); i++) {
double zaehlerX = 0;
double zaehlerY = 0;
double zaehlerZ = 0;
int nenner = 0;
for (int j = 0; j < data.Count; j++) {
if (g[i,j] == 1) {
var e = data[j];
zaehlerX += e.X;
zaehlerY += e.Y;
zaehlerZ += e.Z;
nenner++;
}
}
if (nenner > 1) { // nur wenn der nenner>0 oder >1??? ist muss
// was
// geaendert werden
// Log.write("Setze neuen Centeroid!");
this.map[i] = new double[] {(zaehlerX / (double) nenner),
(zaehlerY / (double) nenner),
(zaehlerZ / (double) nenner) };
// Log.write("Centeroid: "+i+": "+newcenteroid[0]+":"+newcenteroid[1]);
}
} // new centeroids
} while (!equalarrays(g_alt, g));
// Debug: Printout groups
/*
* for (int i = 0; i < n; i++) { for (int j = 0; j < this.data.Count;
* j++) { Log.write(g[i][j] + "|"); } Log.write(""); }
*/
}
