internal static List <PotentialStarStruct> GetPeakPixelsInArea(
uint[,] data, out uint[,] lpdData, int bpp, uint maxSignalValue, uint aboveNoiseLevelRequired,
double minDistanceInPixels, bool useLPDFilter, Rectangle excludeArea)
{
if (useLPDFilter)
{
lpdData = ImageFilters.LowPassDifferenceFilter(data, bpp, false);
}
else
{
lpdData = data;
}
int nWidth = lpdData.GetLength(0);
int nHeight = lpdData.GetLength(1);
List <PotentialStarStruct> potentialStars = new List <PotentialStarStruct>();
ExaminePeakPixelCandidate examinePixelCallback =
delegate(int x, int y, uint z)
{
bool tooClose = false;
// Local maximum, test for a star
foreach (PotentialStarStruct prevStar in potentialStars)
{
double dist =
Math.Sqrt((prevStar.X - x) * (prevStar.X - x) +
(prevStar.Y - y) * (prevStar.Y - y));
if (dist <= minDistanceInPixels)
{
tooClose = true;
if (prevStar.Z < z)
{
prevStar.Z = z;
prevStar.X = x;
prevStar.Y = y;
}
break;
}
}
if (!tooClose)
{
potentialStars.Add(new PotentialStarStruct()
{
X = x, Y = y, Z = z
});
}
// An early return if too many peak pixels have been found
return(potentialStars.Count <=
TangraConfig.Settings.Special.
StarFinderMaxNumberOfPotentialStars);
};
if (useLPDFilter)
{
CheckAllPixels(lpdData, nWidth, nHeight, aboveNoiseLevelRequired, excludeArea, examinePixelCallback);
}
else
{
CheckPixelsFromBrightToFaint(lpdData, nWidth, nHeight, bpp, maxSignalValue, aboveNoiseLevelRequired, excludeArea, examinePixelCallback);
}
return(potentialStars);
}