/// <summary>
/// Retrieve all values from an image based on channel
/// </summary>
/// <param name="img">Image to analyze</param>
/// <param name="channel">Color channel to extract</param>
/// <param name="updateUi">Callback to monitor progress</param>
/// <returns></returns>
public static int[,] GetChannel(Bitmap img, DetectorChannel channel, FrmMain.UpdateUi updateUi)
{
int[,] levels = new int[img.Width, img.Height];
int rx = 299;
int gx = 587;
int bx = 114;
switch (channel)
{
case DetectorChannel.None:
// Invalid setting!
return(null);
case DetectorChannel.Brightness:
break;
case DetectorChannel.Red:
rx = 1000;
gx = 0;
bx = 0;
break;
case DetectorChannel.Green:
rx = 0;
gx = 1000;
bx = 0;
break;
case DetectorChannel.Blue:
rx = 0;
gx = 0;
bx = 1000;
break;
case DetectorChannel.RedGreen:
rx = 400;
gx = 600;
bx = 0;
break;
case DetectorChannel.RedBlue:
rx = 700;
gx = 0;
bx = 300;
break;
case DetectorChannel.GreenBlue:
rx = 0;
gx = 700;
bx = 300;
break;
case DetectorChannel.Hue:
for (int y = 0; y < img.Height; y++)
{
for (int x = 0; x < img.Width; x++)
{
Color rgb = img.GetPixel(x, y);
levels[x, y] = (int)(rgb.GetHue() * 10000f);
}
updateUi(y * 50 / img.Height);
}
return(levels);
}
// Generic transform (all except hue)
for (int y = 0; y < img.Height; y++)
{
for (int x = 0; x < img.Width; x++)
{
Color rgb = img.GetPixel(x, y);
levels[x, y] = rx * rgb.R + gx * rgb.G + bx * rgb.B;
}
updateUi(y * 50 / img.Height);
}
return(levels);
}
public DetectorParams()
{
Detector = null;
Threshold = 0;
Channel = DetectorChannel.None;
}
