public static BitmapSource GetBlueChannel(BitmapSource source)
{
var bytes = ToBytes(source);
for (int blue = 0, green = 1, red = 2, alpha = 3; alpha < bytes.Length; blue += 4, green += 4, red += 4, alpha += 4)
{
bytes[green] = bytes[blue];
bytes[red] = bytes[blue];
}
return(source.CloneWithAnotherBytes(bytes));
}
public static BitmapSource GetGrayscale(BitmapSource source)
{
var bytes = ToBytes(source);
for (int blue = 0, green = 1, red = 2, alpha = 3; alpha < bytes.Length; blue += 4, green += 4, red += 4, alpha += 4)
{
var average = (byte)((bytes[blue] + bytes[green] + bytes[red]) / 3);
bytes[blue] = average;
bytes[red] = average;
bytes[green] = average;
}
return(source.CloneWithAnotherBytes(bytes));
}
public static BitmapSource GetBitmapSourceWithReplacedRedChannel(BitmapSource source, BitmapSource additingSource)
{
var sourceBytes = ToBytes(source);
byte[] additingBytes;
if (Math.Abs(source.Width - additingSource.Width) > 1 || Math.Abs(source.Height - additingSource.Height) > 1)
{
additingBytes = ToBytes(CloneWithDifferentSize(additingSource, source.PixelWidth, source.PixelHeight));
}
else
{
additingBytes = ToBytes(additingSource);
}
for (int blue = 0, green = 1, red = 2, alpha = 3; alpha < sourceBytes.Length && alpha < additingBytes.Length; blue += 4, green += 4, red += 4, alpha += 4)
{
var average = CalculateAverageByte(additingBytes[blue],
additingBytes[green], additingBytes[red], additingBytes[alpha]);
sourceBytes[red] = average;
}
return(source.CloneWithAnotherBytes(sourceBytes));
}
