public static ByteImage ToByteImageOfY(this RawBitmapData rawBitmapData, Rectangle area)
{
RawBitmapData rawBitmapData1ByteComponent = rawBitmapData;
if (!Is1BytePerComponentFormat(rawBitmapData.PixelFormat))
{
using (var bitmap = rawBitmapData.ToBitmap())
{
if (bitmap.PixelFormat == PixelFormat.Format24bppRgb)
{
rawBitmapData1ByteComponent = bitmap.ToRawBitmapData();
}
else
{
using (var bitmap24Rgb = bitmap.ToRgb24())
rawBitmapData1ByteComponent = bitmap24Rgb.ToRawBitmapData();
}
}
}
var data = rawBitmapData1ByteComponent;
var r = new ByteImage(rawBitmapData1ByteComponent.PixelWidth, rawBitmapData1ByteComponent.PixelHeight);
var yc = new Vector3(66, 129, 25);
rawBitmapData1ByteComponent.PerPixelInArea(area, (dx, dy, A, R, G, B) =>
{
Vector3 sv;
sv.Z = R;
sv.Y = G;
sv.X = B;
r[dx, dy] = (byte)(((int)(Vector3.Dot(yc, sv) + 128) >> 8) + 16);
});
return(r);
}
