internal SpectraReader(AstroImage image, float angleDegrees)
{
m_Image = image;
m_Mapper = new RotationMapper(image.Width, image.Height, angleDegrees);
m_SourceVideoFrame = new RectangleF(0, 0, image.Width, image.Height);
}
internal float LocateSpectraAngle(PSFFit selectedStar, AstroImage image)
{
float x0 = (float)selectedStar.XCenter;
float y0 = (float)selectedStar.YCenter;
uint brigthness10 = (uint)(0.1 * selectedStar.Brightness);
uint brigthness20 = (uint)(0.2 * selectedStar.Brightness);
uint brigthness40 = (uint)(0.4 * selectedStar.Brightness);
uint bgFromPsf = (uint)(selectedStar.I0);
int minDistance = (int)(10 * selectedStar.FWHM);
int clearDist = (int)(2 * selectedStar.FWHM);
float width = image.Width;
float height = image.Height;
uint[] angles = new uint[360];
uint[] sums = new uint[360];
uint[] pixAbove10Perc = new uint[360];
uint[] pixAbove20Perc = new uint[360];
uint[] pixAbove40Perc = new uint[360];
int diagonnalPixels = (int)Math.Ceiling(Math.Sqrt(image.Width * image.Width + image.Height * image.Height));
int iFrom = 0;
int iTo = 360;
bool peakFound = false;
for (int i = iFrom; i < iTo; i++)
{
var mapper = new RotationMapper(image.Width, image.Height, i);
PointF p1 = mapper.GetDestCoords(x0, y0);
float x1 = p1.X;
float y1 = p1.Y;
uint rowSum = 0;
uint pixAbove10 = 0;
uint pixAbove10Max = 0;
bool prevPixAbove10 = false;
uint pixAbove20 = 0;
uint pixAbove20Max = 0;
bool prevPixAbove20 = false;
uint pixAbove40 = 0;
uint pixAbove40Max = 0;
bool prevPixAbove40 = false;
for (int d = minDistance; d < diagonnalPixels; d++)
{
PointF p = mapper.GetSourceCoords(x1 + d, y1);
if (p.X >= 0 && p.X < width && p.Y >= 0 && p.Y < height)
{
uint value = (uint)image.GetPixel((int)p.X, (int)p.Y);
rowSum += value;
PointF pu = mapper.GetSourceCoords(x1 + d, y1 + clearDist);
PointF pd = mapper.GetSourceCoords(x1 + d, y1 - clearDist);
if (pu.X >= 0 && pu.X < width && pu.Y >= 0 && pu.Y < height &&
pd.X >= 0 && pd.X < width && pd.Y >= 0 && pd.Y < height)
{
uint value_u = (uint)image.GetPixel((int)pu.X, (int)pu.Y);
uint value_d = (uint)image.GetPixel((int)pd.X, (int)pd.Y);
if ((value - bgFromPsf) > brigthness10 && value > value_u && value > value_d)
{
if (prevPixAbove10) pixAbove10++;
prevPixAbove10 = true;
}
else
{
prevPixAbove10 = false;
if (pixAbove10Max < pixAbove10) pixAbove10Max = pixAbove10;
pixAbove10 = 0;
peakFound = true;
}
if ((value - bgFromPsf) > brigthness20 && value > value_u && value > value_d)
{
if (prevPixAbove20) pixAbove20++;
prevPixAbove20 = true;
}
else
{
prevPixAbove20 = false;
if (pixAbove20Max < pixAbove20) pixAbove20Max = pixAbove20;
pixAbove20 = 0;
peakFound = true;
}
if ((value - bgFromPsf) > brigthness40 && value > value_u && value > value_d)
{
if (prevPixAbove40) pixAbove40++;
prevPixAbove40 = true;
}
else
{
prevPixAbove40 = false;
if (pixAbove40Max < pixAbove40) pixAbove40Max = pixAbove40;
pixAbove40 = 0;
peakFound = true;
}
}
else
{
prevPixAbove10 = false;
if (pixAbove10Max < pixAbove10) pixAbove10Max = pixAbove10;
pixAbove10 = 0;
prevPixAbove20 = false;
if (pixAbove20Max < pixAbove20) pixAbove20Max = pixAbove20;
pixAbove20 = 0;
prevPixAbove40 = false;
if (pixAbove40Max < pixAbove40) pixAbove40Max = pixAbove40;
pixAbove40 = 0;
peakFound = true;
}
}
}
angles[i] = (uint)i;
sums[i] = rowSum;
pixAbove10Perc[i] = pixAbove10Max;
pixAbove20Perc[i] = pixAbove20Max;
pixAbove40Perc[i] = pixAbove40Max;
}
if (!peakFound)
return float.NaN;
var angles10 = new List<uint>(angles).ToArray();
var angles20 = new List<uint>(angles).ToArray();
var angles40 = new List<uint>(angles).ToArray();
Array.Sort(sums, angles);
Array.Sort(pixAbove10Perc, angles10);
Array.Sort(pixAbove20Perc, angles20);
Array.Sort(pixAbove40Perc, angles40);
uint roughAngle = angles[359];
if (pixAbove10Perc[358]*2 < pixAbove10Perc[359])
{
// If second best at 10% id a lot smaller score than the top 10% scopem then this is it
roughAngle = angles10[359];
}
else
{
if (Math.Abs((int)angles[358] - (int)angles[359]) > 3)// or for large stars the two best can be sequential angles
return float.NaN;
}
uint bestSum = 0;
float bestAngle = 0f;
for (float a = roughAngle - 1; a < roughAngle + 1; a += 0.02f)
{
var mapper = new RotationMapper(image.Width, image.Height, a);
PointF p1 = mapper.GetDestCoords(x0, y0);
float x1 = p1.X;
float y1 = p1.Y;
uint rowSum = 0;
for (int d = minDistance; d < diagonnalPixels; d++)
{
PointF p = mapper.GetSourceCoords(x1 + d, y1);
if (p.X >= 0 && p.X < width && p.Y >= 0 && p.Y < height)
{
uint pixVal = (uint)image.GetPixel((int)p.X, (int)p.Y);
rowSum += pixVal;
}
}
if (rowSum > bestSum)
{
bestSum = rowSum;
bestAngle = a;
}
}
return bestAngle;
}
private bool SelectingStarSpectra(Point location, bool shiftHeld, bool controlHeld)
{
IVideoFrame currentVideoFrame = m_VideoRenderingController.GetCurrentFrame();
if (currentVideoFrame != null)
{
var astroImg = new AstroImage(currentVideoFrame, m_VideoRenderingController.Width, m_VideoRenderingController.Height, currentVideoFrame.MaxSignalValue);
uint[,] areaPixels = astroImg.GetMeasurableAreaPixels(location.X, location.Y);
PSFFit psfFit = new PSFFit(location.X, location.Y);
psfFit.Fit(areaPixels);
if (psfFit.IsSolved && psfFit.Certainty > Settings.Default.TrackingMinGuidingCertainty)
{
float angle = LocateSpectraAngle(psfFit, astroImg);
if (!float.IsNaN(angle))
{
TrackingContext.Current.GuidingStar = new LastTrackedPosition(m_Bpp)
{
FWHM = (float)psfFit.FWHM,
X = (float)psfFit.XCenter,
Y = (float)psfFit.YCenter,
IsFixed = false
};
TrackingContext.Current.ReConfigureNativeTracking(m_VideoRenderingController.Width, m_VideoRenderingController.Height);
TrackingContext.Current.SpectraAngleDeg = angle;
return true;
}
}
}
return false;
}
private bool SelectingTargetStar(Point location, bool shiftHeld, bool controlHeld)
{
IVideoFrame currentVideoFrame = m_VideoRenderingController.GetCurrentFrame();
if (currentVideoFrame != null)
{
var astroImg = new AstroImage(currentVideoFrame, m_VideoRenderingController.Width, m_VideoRenderingController.Height);
uint[,] areaPixels = astroImg.GetMeasurableAreaPixels(location.X, location.Y);
PSFFit psfFit = new PSFFit(location.X, location.Y);
psfFit.Fit(areaPixels);
TrackingContext.Current.TargetStar = new LastTrackedPosition(m_Bpp)
{
FWHM = (float)psfFit.FWHM,
X = (float)psfFit.XCenter,
Y = (float)psfFit.YCenter
};
TrackingContext.Current.TargetStar.IsFixed = !psfFit.IsSolved || psfFit.Certainty < Settings.Default.TrackingMinForcedFixedObjCertainty || controlHeld;
TrackingContext.Current.TargetStar.IsFullDisapearance = shiftHeld;
TrackingContext.Current.ReConfigureNativeTracking(m_VideoRenderingController.Width, m_VideoRenderingController.Height);
return true;
}
return false;
}
private bool SelectGuidingStar(Point location, bool shiftHeld, bool controlHeld)
{
IVideoFrame currentVideoFrame = m_VideoRenderingController.GetCurrentFrame();
if (currentVideoFrame != null)
{
// Find the object at the location and set it as a guiding star
var astroImg = new AstroImage(currentVideoFrame, m_VideoRenderingController.Width, m_VideoRenderingController.Height);
uint[,] areaPixels = astroImg.GetMeasurableAreaPixels(location.X, location.Y);
PSFFit psfFit = new PSFFit(location.X, location.Y);
psfFit.Fit(areaPixels);
if (psfFit.IsSolved && psfFit.Certainty > Settings.Default.TrackingMinGuidingCertainty)
{
TrackingContext.Current.GuidingStar = new LastTrackedPosition(m_Bpp)
{
FWHM = (float)psfFit.FWHM,
X = (float)psfFit.XCenter,
Y = (float)psfFit.YCenter,
IsFixed = false
};
TrackingContext.Current.ReConfigureNativeTracking(m_VideoRenderingController.Width, m_VideoRenderingController.Height);
TrackingContext.Current.SpectraAngleDeg = float.NaN;
return true;
}
else
{
// NOTE: Too faint to be used as a guiding star
MessageBox.Show(m_MainForm, "This object is not bright enought for a Guiding star.", "OccuRec", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
return false;
}
