protected PointIndexPair FindTriangular(ExtremaPointType type, int fromIndex, int sensitivity, int triDist, double[] intervals, double[] amplitude)
{
if (type == ExtremaPointType.LOCAL_MAX)
{
return(FindTriangular(fromIndex, sensitivity, triDist, intervals, amplitude, (yline, y) => yline > y));
}
else
{
return(FindTriangular(fromIndex, sensitivity, triDist, intervals, amplitude, (yline, y) => yline < y));
}
}
protected PointIndexPair Find(ExtremaPointType type, int fromIndex, ExtremaSearchConfig config, double[] intervals, double[] amplitude)
{
if (type == ExtremaPointType.LOCAL_MAX)
{
return(Find(fromIndex, config, intervals, amplitude, (smoothedValue, extremaAmplitide) => smoothedValue > extremaAmplitide));
}
else
{
return(Find(fromIndex, config, intervals, amplitude, (smoothedValue, extremaAmplitide) => smoothedValue < extremaAmplitide));
}
}
protected override double[] Extract(double[] intervals, double[] amplitude)
{
ExtremaPointType nextLocalPoint = start;
int fromIndex = 0;
List <double[]> pointFeatures = new List <double[]>();
using (IEnumerator <ExtremaSearchConfig> iterator = searchConfig.GetEnumerator())
{
while (iterator.MoveNext())
{
ExtremaSearchConfig config = iterator.Current;
PointIndexPair extremaPoint = Find(nextLocalPoint, fromIndex, config, intervals, amplitude);
if (extremaPoint.IndexOutOfRange && config.GeometricRecoveryConfig != null)
{
GeometricRecoveryConfig recoveryConfig = config.GeometricRecoveryConfig;
// use triangular approximation to attempt missing point recovery (need to do 2 points - this + next to approximate missing point)
extremaPoint = FindTriangular(nextLocalPoint, fromIndex, recoveryConfig.FirstPointSensitivity, recoveryConfig.FirstTriangleLength, intervals, amplitude);
// add first recovered point
pointFeatures.Add(GetFeatures(extremaPoint, intervals, config.DataModel));
// skip forward one if we can since we've already found the next point
if (!iterator.MoveNext())
{
break;
}
config = iterator.Current;
// recover the second point (which would also be "missing")
nextLocalPoint = Alternate(nextLocalPoint);
extremaPoint = FindTriangular(nextLocalPoint, extremaPoint.PointIndex, recoveryConfig.SecondPointSensitivity, recoveryConfig.SecondTriangleLength, intervals, amplitude);
}
pointFeatures.Add(GetFeatures(extremaPoint, intervals, config.DataModel));
fromIndex = extremaPoint.PointIndex;
nextLocalPoint = Alternate(nextLocalPoint);
}
}
return(pointFeatures.SelectMany(p => p).ToArray());
}
public ExtremaPointTemplateImpl(ExtremaPointType start, List <ExtremaSearchConfig> searchConfig)
{
this.searchConfig = searchConfig;
this.start = start;
}
public GeometricExtractorBuilder(ExtremaPointType start)
{
searchConfig = new List <ExtremaSearchConfig>();
this.start = start;
}
protected ExtremaPointType Alternate(ExtremaPointType type)
{
return(type == ExtremaPointType.LOCAL_MAX ? ExtremaPointType.LOCAL_MIN : ExtremaPointType.LOCAL_MAX);
}
