private FreeImageAlgorithmsBitmap TileImage(Tile tile) { FreeImageAlgorithmsBitmap fib = tile.LoadFreeImageBitmap(); fib.ConvertToStandardType(true); if (!fib.IsGreyScale) { if (this.channel == FREE_IMAGE_COLOR_CHANNEL.FICC_RGB) { fib.ConvertToGreyscale(); } else { fib.GetChannel(this.channel); } } return(fib); }