/// <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 checkBpccValue()
{
var sourcePixelColor = PixelUtilities.GetPixelBgra8(this.sourcePicture.Pixels, ImageConstants.FirstX,
ImageConstants.SecondX, this.sourcePicture.Width,
this.sourcePicture.Height);
this.bpcc = HeaderManager.CheckBpccValue(sourcePixelColor);
}
/// <summary>
/// Determines whether [contains hidden message].
/// </summary>
/// <returns>
/// <c>true</c> if [contains hidden message]; otherwise, <c>false</c>.
/// </returns>
public bool ContainsHiddenMessage()
{
var sourcePixelColor = PixelUtilities.GetPixelBgra8(this.sourcePicture.Pixels, ImageConstants.FirstX,
ImageConstants.FirstX,
this.sourcePicture.Width,
this.sourcePicture.Height);
return(HeaderManager.ContainsHiddenMessage(sourcePixelColor));
}
/// <summary>
/// Determines whether this instance is text.
/// </summary>
/// <returns>
/// <c>true</c> if this instance is text; otherwise, <c>false</c>.
/// </returns>
public bool IsText()
{
var sourcePixelColor = PixelUtilities.GetPixelBgra8(this.sourcePicture.Pixels, ImageConstants.FirstX,
ImageConstants.SecondX,
this.sourcePicture.Width,
this.sourcePicture.Height);
return(HeaderManager.CheckFileType(sourcePixelColor));
}
/// <summary>
/// Determines whether this instance is encrypted.
/// </summary>
/// <returns>
/// <c>Encrypted</c> if this instance is encrypted; otherwise, <c>Unencrypted</c>.
/// </returns>
public EncryptionType IsEncrypted()
{
var sourcePixelColor = PixelUtilities.GetPixelBgra8(this.sourcePicture.Pixels, ImageConstants.FirstX,
ImageConstants.SecondX,
this.sourcePicture.Width,
this.sourcePicture.Height);
return(HeaderManager.CheckForEncryption(sourcePixelColor));
}
private void imageEmbedding(byte[] pixels)
{
for (var i = 0; i < this.hiddenPicture.Height; i++)
{
for (var j = 0; j < this.hiddenPicture.Width; j++)
{
j = HeaderManager.SkipHeaderLocation(i, j);
this.embedPixel(pixels, i, j);
}
}
}
private void updateSourceImage(IReadOnlyList <byte> bytes)
{
var index = 0;
for (var i = 0; i < this.sourcePicture.Height; i++)
{
for (var j = 0; j < this.sourcePicture.Width; j++)
{
j = HeaderManager.SkipHeaderLocation(i, j);
index = this.updatePixel(bytes, i, j, index);
}
}
}
/// <summary>
/// Extracts the image.
/// </summary>
/// <param name="pixels">The pixels.</param>
public void ExtractImage(byte[] pixels)
{
for (var i = 0; i < this.sourcePicture.Height; i++)
{
for (var j = 0; j < this.sourcePicture.Width; j++)
{
j = HeaderManager.SkipHeaderLocation(i, j);
var hiddenPixelColor = PixelUtilities.GetPixelBgra8(pixels, i, j,
this.sourcePicture.Width,
this.sourcePicture.Height);
this.setPixelToMonochromeColor(pixels, hiddenPixelColor, i, j);
}
}
}
private void checkForEncryption()
{
var sourcePixelColor = PixelUtilities.GetPixelBgra8(this.sourcePicture.Pixels, ImageConstants.FirstX,
ImageConstants.SecondX, this.sourcePicture.Width,
this.sourcePicture.Height);
if (HeaderManager.CheckForEncryption(sourcePixelColor) == EncryptionType.Encrypted)
{
this.isEncrypted = true;
}
else
{
this.isEncrypted = false;
}
}
