public DifferencesExpansionConfiguraitonDialogBox(DifferencesExpansionConfiguration standardDEConfig,
DifferenceExpansionBruteForceConfiguration bruteForceDEConfig,
AlgorithmConfiguration currentConfiguration)
{
InitializeComponent();
if (standardDEConfig != null)
{
this.threshold = standardDEConfig.Threeshold;
tbThreshold.Text = threshold.ToString();
cbEmbeddingDirection.SelectedIndex = (int)standardDEConfig.EmbeddingDirection;
cbR.IsChecked = standardDEConfig.EmbeddingChanels.Contains(EmbeddingChanel.R);
cbG.IsChecked = standardDEConfig.EmbeddingChanels.Contains(EmbeddingChanel.G);
cbB.IsChecked = standardDEConfig.EmbeddingChanels.Contains(EmbeddingChanel.B);
ComboBoxItem standardComboBoxItem = new ComboBoxItem();
standardComboBoxItem.Content = "Standard";
standardComboBoxItem.IsSelected = currentConfiguration is DifferencesExpansionConfiguration;
cbConfigurationType.Items.Add(standardComboBoxItem);
}
if (bruteForceDEConfig != null)
{
cbHorizontal_BF.IsChecked = bruteForceDEConfig.EmbeddingDirections.Contains(Direction.Horizontal);
cbVertical_BF.IsChecked = bruteForceDEConfig.EmbeddingDirections.Contains(Direction.Vertical);
cbR_BF.IsChecked = bruteForceDEConfig.EmbeddingChanels.Contains(EmbeddingChanel.R);
cbG_BF.IsChecked = bruteForceDEConfig.EmbeddingChanels.Contains(EmbeddingChanel.G);
cbB_BF.IsChecked = bruteForceDEConfig.EmbeddingChanels.Contains(EmbeddingChanel.B);
ComboBoxItem bruteForceItem = new ComboBoxItem();
bruteForceItem.Content = "Brute force";
bruteForceItem.IsSelected = currentConfiguration is DifferenceExpansionBruteForceConfiguration;
cbConfigurationType.Items.Add(bruteForceItem);
}
}
public Bitmap Encode(Bitmap inputImage, string payload, AlgorithmConfiguration configuration)
{
DifferencesExpansionConfiguration config = (DifferencesExpansionConfiguration)configuration;
Bitmap image = new Bitmap(inputImage);
// For multiple embedding channels payload to encode is divided into chunks - one for each RGB channel
List <string> payloadChunks = GetPayloadChunks(payload, config.EmbeddingChanels);
int chunkNumber = 0;
foreach (EmbeddingChanel embeddingChanel in Enum.GetValues(typeof(EmbeddingChanel)))
{
if (config.EmbeddingChanels.Contains(embeddingChanel))
{
// Encoding of payload chunk performed for given channel of RGB
EncodePayloadIntoImage(image, payloadChunks[chunkNumber++], config.EmbeddingDirection, config.Threeshold, embeddingChanel);
}
}
return(image);
}
private void BtnConfigDE_Click(object sender, RoutedEventArgs e)
{
if (isWatermarkingModeSelected())
{
DifferencesExpansionConfiguration config = (DifferencesExpansionConfiguration)standardEncodingDEConfig;
var dialogBox = new ConfigurationDialogBox.DifferencesExpansionConfiguraitonDialogBox(config, null, activeEncodingDEConfig)
{
Owner = this,
};
dialogBox.ShowDialog();
AlgorithmConfiguration newConfig = GetConfigurationBasedOnDialogBoxResult(dialogBox);
if (newConfig != null)
{
standardEncodingDEConfig = newConfig;
activeEncodingDEConfig = standardEncodingDEConfig;
}
}
if (isAnalyzingModeSelected())
{
DifferencesExpansionConfiguration deConfig = (DifferencesExpansionConfiguration)standardDecodingDEConfig;
DifferenceExpansionBruteForceConfiguration deBruteForceConfig = (DifferenceExpansionBruteForceConfiguration)bruteForceDecodingDEConfig;
var dialogBox = new ConfigurationDialogBox.DifferencesExpansionConfiguraitonDialogBox(deConfig, deBruteForceConfig, activeDecodingDEConfig)
{
Owner = this,
};
dialogBox.ShowDialog();
AlgorithmConfiguration newConfig = GetConfigurationBasedOnDialogBoxResult(dialogBox);
if (dialogBox.cbConfigurationType.Text == "Standard" && newConfig != null)
{
standardDecodingDEConfig = newConfig;
activeDecodingDEConfig = standardDecodingDEConfig;
}
else if (dialogBox.cbConfigurationType.Text == "Brute force" && newConfig != null)
{
bruteForceDecodingDEConfig = newConfig;
activeDecodingDEConfig = bruteForceDecodingDEConfig;
}
}
}
private Tuple <Bitmap, string> Decode(Bitmap image, DifferencesExpansionConfiguration config)
{
try
{
List <string> payloadChunks = new List <string>();
foreach (EmbeddingChanel embeddingChanel in Enum.GetValues(typeof(EmbeddingChanel)))
{
if (config.EmbeddingChanels.Contains(embeddingChanel))
{
// For each RGB elected in configuration chunk of embedded payload is retrieved
payloadChunks.Add(DecodeImage(image, config.EmbeddingDirection, embeddingChanel));
}
}
// Payload from all selected channels are concatenated to build whole message
string payload = String.Join("", payloadChunks);
// Payload and oryginal image are returned
return(new Tuple <Bitmap, string>(image, payload));
}
catch
{
}
return(null);
}
