/// <summary>
/// Modify least significant bit of a large photo to put smaller photos in it
/// </summary>
/// <param name="source">Source photo to put another image in it</param>
/// <param name="row">Start row of large photo for starting modification</param>
/// <param name="column">Start column of large photo for starting modification</param>
/// <param name="pixelColor">The color of pixel in secret photo</param>
private static void ModifyPhotoUsingLSB(this Image <Rgb, byte> source, int row, int column, Rgb pixelColor)
{
var(rBinary, gBinary, bBinary) = pixelColor.BinaryRepresentationOfColor();
int newR, newG, newB; bool isZero;
for (int k = 0; k < 8; k++)
{
var targetPixel = source[row, column];
byte r = (byte)targetPixel.Red;
byte g = (byte)targetPixel.Green;
byte b = (byte)targetPixel.Blue;
// Red
isZero = rBinary[7 - k] == '0';
newR = (isZero) ? r.ResetLSB() : r.SetLSB();
// Green
isZero = gBinary[7 - k] == '0';
newG = (isZero) ? g.ResetLSB() : g.SetLSB();
// Blue
isZero = bBinary[7 - k] == '0';
newB = (isZero) ? b.ResetLSB() : b.SetLSB();
source[row, column] = new Rgb(newR, newG, newB);
IncrementPhotoIndex(ref row, ref column, 1000);
}
}
