/// <summary>
/// Extract the concatenated feature vector from a skeleton
/// </summary>
/// <param name="s">A processed Skeleton</param>
/// <returns>The concatenated feature vector</returns>
public static double[] FeatureSet(Skeleton s)
{
SkeletonFeatureFrame sff = new SkeletonFeatureFrame(s);
var features = new double[31];
int nextFreeIndex = 0;
nextFreeIndex = AddFeat(sff, SkeletonFeatureFrame.DirectionVectors.ArmLeft, features, nextFreeIndex);
nextFreeIndex = AddFeat(sff, SkeletonFeatureFrame.DirectionVectors.ArmRight, features, nextFreeIndex);
nextFreeIndex = AddFeat(sff, SkeletonFeatureFrame.DirectionVectors.ForeArmLeft, features, nextFreeIndex);
nextFreeIndex = AddFeat(sff, SkeletonFeatureFrame.DirectionVectors.ForeArmLeft, features, nextFreeIndex);
nextFreeIndex = AddFeat(sff, SkeletonFeatureFrame.DirectionVectors.HandLeft, features, nextFreeIndex);
nextFreeIndex = AddFeat(sff, SkeletonFeatureFrame.DirectionVectors.HandRight, features, nextFreeIndex);
nextFreeIndex = AddFeat(sff, SkeletonFeatureFrame.DirectionVectors.ShoulderBladeLeft, features, nextFreeIndex);
nextFreeIndex = AddFeat(sff, SkeletonFeatureFrame.DirectionVectors.ShoulderBladeRight, features, nextFreeIndex);
nextFreeIndex = AddFeat(sff, SkeletonFeatureFrame.DirectionVectors.BetweenHands, features, nextFreeIndex);
features[nextFreeIndex++] = sff.Angle(SkeletonFeatureFrame.Angles.AngleElbowLeft);
features[nextFreeIndex++] = sff.Angle(SkeletonFeatureFrame.Angles.AngleElbowRight);
features[nextFreeIndex++] = sff.Angle(SkeletonFeatureFrame.Angles.AngleShoulderLeft);
features[nextFreeIndex++] = sff.Angle(SkeletonFeatureFrame.Angles.AngleShoulderRight);
if (nextFreeIndex != features.Length) throw new Exception("Missing features");
return features;
}
private static int AddFeat(
SkeletonFeatureFrame sff, SkeletonFeatureFrame.DirectionVectors feature,
double[] arr, int nextFreeIndex)
{
Vector3D v = sff.DirectionVector(feature);
arr[nextFreeIndex++] = v.X;
arr[nextFreeIndex++] = v.Y;
arr[nextFreeIndex++] = v.Z;
return nextFreeIndex;
}
public void Setup()
{
skeleton = new Skeleton
{
ShoulderCenter = Vector3D.Zero,
ShoulderLeft = Vector3D.UnitX,
ShoulderRight = -Vector3D.UnitX
};
skeleton.ElbowLeft = skeleton.ShoulderLeft + 2 * Vector3D.UnitX;
skeleton.WristLeft = skeleton.ElbowLeft + (Vector3D.UnitY);
skeleton.PalmLeft = skeleton.WristLeft + (0.5 * Vector3D.UnitZ);
skeleton.ElbowRight = skeleton.ShoulderRight + new Vector3D(-1.5, 0, -1.5);
skeleton.WristRight = skeleton.ElbowRight + new Vector3D(0, 3.5, -3.5);
skeleton.PalmRight = skeleton.WristRight + new Vector3D(-0.5, 1, -1);
skeletonFeatureFrame = new SkeletonFeatureFrame(skeleton);
}