/// <summary>
/// Encrypts the image embedding.
/// </summary>
/// <param name="pixels">The pixels.</param>
/// <param name="sourcePicture">The source picture.</param>
/// <param name="hiddenPicture">The hidden picture.</param>
public static void EncryptImage(byte[] pixels, Picture sourcePicture, Picture hiddenPicture)
{
for (var i = 0; i < sourcePicture.Height; i++)
{
for (var j = 0; j < sourcePicture.Width; j++)
{
j = HeaderManager.SkipHeaderLocation(i, j);
var sourcePixelColor =
PixelUtilities.GetPixelBgra8(pixels, i, j, sourcePicture.Width, sourcePicture.Height);
var hiddenPixelColor = Colors.White;
hiddenPixelColor =
getOppositeVerticalHalfPixelColor(i, j, hiddenPixelColor, sourcePicture, hiddenPicture);
if (PixelUtilities.IsColorBlack(hiddenPixelColor))
{
embedBlackPixel(pixels, sourcePixelColor, i, j, sourcePicture);
}
else
{
embedWhitePixel(pixels, sourcePixelColor, i, j, sourcePicture);
}
}
}
}
private void embedPixel(byte[] pixels, int i, int j)
{
var sourcePixelColor = PixelUtilities.GetPixelBgra8(pixels, i, j, this.sourcePicture.Width,
this.sourcePicture.Height);
var hiddenPixelColor = PixelUtilities.GetPixelBgra8(this.hiddenPicture.Pixels, i, j,
this.hiddenPicture.Width, this.hiddenPicture.Height);
if (PixelUtilities.IsColorBlack(hiddenPixelColor))
{
this.embedBlackPixel(pixels, sourcePixelColor, i, j);
}
else
{
this.embedWhitePixel(pixels, sourcePixelColor, i, j);
}
}
