/// <summary>
/// The interpolate.
/// </summary>
/// <param name="v2">
/// The v 2.
/// </param>
/// <param name="amount">
/// The amount.
/// </param>
/// <returns>
/// The <see cref="VectorInt"/> .
/// </returns>
public VectorInt Interpolate(VectorInt v2, float amount)
{
return(new VectorInt((int)(this.X + ((v2.X - this.X) * amount)), (int)(this.Y + ((v2.Y - this.Y) * amount))));
}
// public int JitteringCountThreshold { get; set; }
// public int JitteringAmountThreshold
// {
// get { return jitteringAmountThreshold; }
// set
// {
// jitteringAmountThreshold = value;
// jitteringAmountThresholdSq = value * value;
// }
// }
#region Public Methods and Operators
/// <summary>
/// The process.
/// </summary>
/// <returns> The <see cref="Segment" /> . </returns>
/// <exception cref="InvalidOperationException"></exception>
public Segment Process()
{
if (this.Histogram == null)
{
throw new InvalidOperationException("The histogram must be provided");
}
int[] hx = this.Histogram.X;
int[] hy = this.Histogram.Y;
VectorInt histUpperThreshold = this.Histogram.Max * 0.5f;
// Find seeds for the segmentation:
// All the x and y histogram indices where the value is above the half maximum and have a min distance
const int step = 10;
// x
List <int> ix = this.GetIndicesAboveThreshold(this.Histogram.MaxIndex.X, -step, hx, histUpperThreshold.X);
ix.AddRange(this.GetIndicesAboveThreshold(this.Histogram.MaxIndex.X + step, step, hx, histUpperThreshold.X));
// y
List <int> iy = this.GetIndicesAboveThreshold(this.Histogram.MaxIndex.Y, -step, hy, histUpperThreshold.Y);
iy.AddRange(this.GetIndicesAboveThreshold(this.Histogram.MaxIndex.Y + step, step, hy, histUpperThreshold.Y));
// Find the boundaries for the segments defined by the seeds
var segments = new List <Segment>();
foreach (int y0 in iy)
{
foreach (int x0 in ix)
{
var segment = new Segment(0, 0, 0, 0);
segment.Min.X = this.GetIndexBelowThreshold(x0, -1, hx, this.ThresholdLuminance.X);
segment.Max.X = this.GetIndexBelowThreshold(x0, 1, hx, this.ThresholdLuminance.X);
segment.Min.Y = this.GetIndexBelowThreshold(y0, -1, hy, this.ThresholdLuminance.Y);
segment.Max.Y = this.GetIndexBelowThreshold(y0, 1, hy, this.ThresholdLuminance.Y);
// Filter segments by diameter
if (segment.Diagonal > this.MinDiameter && segment.Diagonal < this.MaxDiameter)
{
segments.Add(segment);
}
}
}
if (segments.Count > 0)
{
// Sort (only pick the largest for now)
return(segments.OrderByDescending(s => s.DiagonalSq).FirstOrDefault());
// segments.OrderByDescending(s => s.Center.X);
// VectorInt lastCenter = VectorInt.Zero;
// for (int i = 0; i < segments.Count; i++)
// {
// if (segments[i].Center.Equals(lastCenter))
// {
// continue;
// }
// else
// {
// groupedSegments.Add(segments[i]);
// lastCenter = segments[i].Center;
// }
// }
// groupedSegments.OrderByDescending(s => s.DiagonalSq);
//// Prevent jittering:
//// If the position doesn't change too much over a certain timespan, the last segment is always returned.
//// Check for jittering position.
// bool isJittering = true;
// if ((lastSegment.Min - foundSegment.Min).LengthSq < jitteringAmountThresholdSq)
// {
// // Check for jittering size
// if (Math.Abs(foundSegment.DiagonalSq - lastSegment.DiagonalSq) < jitteringAmountThresholdSq)
// {
// jitteringCount++;
// isJittering = false;
// }
// }
//// Freeze or not
// if (isJittering)
// {
// jitteringCount = 0;
// }
// if (jitteringCount < JitteringCountThreshold)
// {
// lastSegment = foundSegment;
// }
}
else
{
return(new Segment());
}
}
/// <summary>
/// The dot.
/// </summary>
/// <param name="v2">
/// The v 2.
/// </param>
/// <returns>
/// The <see cref="int"/> .
/// </returns>
public int Dot(VectorInt v2)
{
return(this.X * v2.X + this.Y * v2.Y);
}