private void LocateTwoStarsWithStarRecognition(List <PotentialStarStruct> stars, IAstroImage astroImage, uint[,] pixels)
{
TrackedObject trackedObject1 = TrackedObjects.Cast <TrackedObject>().ToList().Find(o => o.TargetNo == m_LocateObjects[0]);
TrackedObject trackedObject2 = TrackedObjects.Cast <TrackedObject>().ToList().Find(o => o.TargetNo == m_LocateObjects[1]);
LocateTwoStarsWithStarRecognition(stars, astroImage, pixels, trackedObject1, trackedObject2);
}
private void LocateStarsWithStarRecognition(IAstroImage astroImage)
{
EnsureComputedRefinedData();
if (m_MinLocateDistance > 8)
{
if (!LightCurveReductionContext.Instance.WindOrShaking)
{
//TODO: If the wind flag is not set, then use a 3 frame binned integration to locate the stars on
}
uint[,] pixels = astroImage.GetPixelsCopy();
List <PotentialStarStruct> peakPixels = new List <PotentialStarStruct>();
AutoDiscoveredStars.Clear();
AutoDiscoveredStars = StarFinder.GetStarsInArea(
ref pixels, astroImage.BitPix, astroImage.MaxSignalValue, TangraConfig.PreProcessingFilter.NoFilter, peakPixels, null,
(uint)Math.Round(TangraConfig.Settings.Special.LostTrackingMinSignalCoeff * m_MinLocateSignal),
TangraConfig.Settings.Special.LostTrackingMinDistance, false,
LightCurveReductionContext.Instance.OSDFrame, ReducePeakPixels);
Stopwatch sw = new Stopwatch();
sw.Start();
if (m_LocateObjects.Count == 1 &&
AutoDiscoveredStars.Count == 1)
{
LocateSingleStarsWithStarRecognition(AutoDiscoveredStars, astroImage);
}
else if (
m_LocateObjects.Count == 2 &&
peakPixels.Count > 1)
{
LocateTwoStarsWithStarRecognition(peakPixels, astroImage, pixels);
}
else if (
m_LocateObjects.Count > 2 &&
peakPixels.Count > 1)
{
List <TrackedObject> goodTrackedObjects = TrackedObjects.Cast <TrackedObject>().ToList().FindAll(t => t.LastKnownGoodPosition != null);
if (goodTrackedObjects.Count < 2)
{
// We don't have at least one good pair. Fail.
}
else if (goodTrackedObjects.Count >= 2)
{
goodTrackedObjects.Sort((a, b) =>
Math.Min(b.LastKnownGoodPosition.XDouble, b.LastKnownGoodPosition.YDouble).CompareTo(
Math.Min(a.LastKnownGoodPosition.XDouble, a.LastKnownGoodPosition.YDouble)));
Trace.WriteLine(string.Format("StarRecognitionDistanceBasedLocation: Using objects {0} and {1}", goodTrackedObjects[0].TargetNo, goodTrackedObjects[1].TargetNo));
// There is only 1 good pair so fallback to using 2 star recognition
LocateTwoStarsWithStarRecognition(peakPixels, astroImage, pixels, goodTrackedObjects[0], goodTrackedObjects[1]);
}
}
sw.Stop();
Trace.WriteLine(string.Format("StarRecognitionDistanceBasedLocation: {0} sec", sw.Elapsed.TotalSeconds.ToString("0.00")));
}
}
private void EnsureComputedRefinedData()
{
if (!float.IsNaN(m_MinLocateSignal))
{
m_LocateObjects.Clear();
for (int i = 0; i < TrackedObjects.Count; i++)
{
if (
(!(TrackedObjects[i] as TrackedObject).IsOccultedStar || !LightCurveReductionContext.Instance.FullDisappearance) &&
!TrackedObjects[i].IsOffScreen &&
!float.IsNaN((TrackedObjects[i] as TrackedObject).LastFrameX)
)
{
// Don't include targets offscreen, or targets that were not found during the last tracking (could have been off screen)
m_LocateObjects.Add((TrackedObjects[i] as TrackedObject).TargetNo);
}
}
return;
}
m_MinLocateSignal = TrackedObjects.Cast <TrackedObject>().Min(o => o.RefinedOrLastSignalLevel == 0 ? 255f : o.RefinedOrLastSignalLevel);
// Locate all peak pixels with signal higher than (minSignal + medianNoise) / 2
m_MinLocateSignal = (m_MedianValue + m_MinLocateSignal) / 2f;
double minDistance = double.MaxValue;
for (int i = 0; i < TrackedObjects.Count; i++)
{
if ((!(TrackedObjects[i] as TrackedObject).IsOccultedStar && !TrackedObjects[i].IsOffScreen) ||
!LightCurveReductionContext.Instance.FullDisappearance)
{
m_LocateObjects.Add((TrackedObjects[i] as TrackedObject).TargetNo);
}
for (int j = 0; j < TrackedObjects.Count; j++)
{
if (i == j)
{
continue;
}
double dist = ImagePixel.ComputeDistance(
TrackedObjects[i].OriginalObject.ApertureStartingX,
TrackedObjects[j].OriginalObject.ApertureStartingX,
TrackedObjects[i].OriginalObject.ApertureStartingY,
TrackedObjects[j].OriginalObject.ApertureStartingY);
if (minDistance > dist)
{
minDistance = dist;
}
}
}
m_MinLocateDistance = minDistance / 2.0;
}
private void LocateSingleStarsWithStarRecognition(List <PSFFit> stars, IAstroImage astroImage)
{
TrackedObject trackedObject = TrackedObjects.Cast <TrackedObject>().ToList().Find(o => o.TargetNo == m_LocateObjects[0]);
trackedObject.ThisFrameX = (float)stars[0].XCenter;
trackedObject.ThisFrameY = (float)stars[0].YCenter;
trackedObject.PSFFit = stars[0];
trackedObject.ThisFrameCertainty = (float)stars[0].Certainty;
trackedObject.SetIsLocated(true, NotMeasuredReasons.TrackedSuccessfullyAfterStarRecognition);
AutoDiscoveredStars.Clear();
if (TrackedObjects.Count > 1 &&
LocateFirstObjects.Contains(trackedObject))
{
// If guiding star then run the locate second objects again
ReLocateNonGuidingObjects(astroImage);
}
}
private void ReducePeakPixels2Targets(List <PotentialStarStruct> potentialStars)
{
const double TOLERANCE = 9;
List <int> possibleStarIndexes = new List <int>();
TrackedObject trackedObject1 = TrackedObjects.Cast <TrackedObject>().ToList().Find(o => o.TargetNo == m_LocateObjects[0]) as TrackedObject;
TrackedObject trackedObject2 = TrackedObjects.Cast <TrackedObject>().ToList().Find(o => o.TargetNo == m_LocateObjects[1]) as TrackedObject;
if (trackedObject1.TargetNo != trackedObject2.TargetNo &&
trackedObject1.LastKnownGoodPosition != null &&
trackedObject2.LastKnownGoodPosition != null)
{
double deltaX = Math.Abs(trackedObject1.LastKnownGoodPosition.X - trackedObject2.LastKnownGoodPosition.X);
double deltaY = Math.Abs(trackedObject1.LastKnownGoodPosition.Y - trackedObject2.LastKnownGoodPosition.Y);
for (int i = 0; i < potentialStars.Count; i++)
{
for (int j = i + 1; j < potentialStars.Count; j++)
{
PotentialStarStruct px1 = potentialStars[i];
PotentialStarStruct px2 = potentialStars[j];
double distX = Math.Abs(px1.X - px2.X);
double distY = Math.Abs(px1.Y - px2.Y);
if (Math.Abs(distX - deltaX) < TOLERANCE &&
Math.Abs(distY - deltaY) < TOLERANCE)
{
possibleStarIndexes.Add(i);
possibleStarIndexes.Add(j);
}
}
}
}
for (int i = potentialStars.Count - 1; i >= 0; i--)
{
if (possibleStarIndexes.IndexOf(i) == -1)
{
potentialStars.RemoveAt(i);
}
}
}
