public double?getWhiteBalance(Dictionary <TimeSpan, WriteableBitmap> sl)
{
double y = 0, pb = 0, pr = 0;
if (sl.Count == 0)
{
return(null);
}
foreach (WriteableBitmap b in sl.Values)
{
var p = b.PixelBuffer.ToArray();
for (int i = 0; i < p.Length; i += 4)
{
LColor lc = new LColor(Color.FromArgb(255, p[i + 2], p[i + 1], p[i]));
lc.CalculateRGB2YPbPr();
y += lc.YPbPr_Y;
pb += lc.YPbPr_Pb;
pr += lc.YPbPr_Pr;
}
}
return(y / Math.Max(pb, pr));
}
