///////////////////////////////
// YCbCr Colorspace Filters //
/////////////////////////////
static public byte[] YGrayscale(byte[] buffer)
{
byte[] result = new byte[buffer.Length];
for (int i = 0; i < buffer.Length; i += 4)
{
ColorspaceTools.RGBtoYBR(buffer[i + 2], buffer[i + 1], buffer[i], out int Y, out _, out _);
result[i + 0] = result[i + 1] = result[i + 2] = (byte)Y;
result[i + 3] = 255;
}
return(result);
}
static public byte[] CrInterpolate(byte[] buffer)
{
byte[] result = new byte[buffer.Length];
for (int i = 0; i < buffer.Length; i += 4)
{
ColorspaceTools.RGBtoYBR(buffer[i + 2], buffer[i + 1], buffer[i], out int Y, out int Cb, out int Cr);
result[i] = (byte)((1 - Cr) * 127 + Cr * 127);
result[i + 1] = (byte)((1 - Cr) * 255 + Cr * 0);
result[i + 2] = (byte)((1 - Cr) * 0 + Cr * 255);
result[i + 3] = 255;
}
return(result);
}
