public Tuple <Bitmap, string> Decode(Bitmap encodedImage, AlgorithmConfiguration configuration)
{
// Algorithm instances
DifferencesExpansionAlgorithm de = new DifferencesExpansionAlgorithm();
HistogramShiftingAlgorithm hs = new HistogramShiftingAlgorithm();
// Algorithm configs
DifferenceExpansionBruteForceConfiguration deConfig = new DifferenceExpansionBruteForceConfiguration(
new HashSet <EmbeddingChanel>()
{
EmbeddingChanel.R, EmbeddingChanel.G, EmbeddingChanel.B
}, new HashSet <Direction>()
{
Direction.Horizontal, Direction.Vertical
});
HistogramShiftingConfiguration hsConfig = new HistogramShiftingConfiguration(true,
new HashSet <EmbeddingChanel>()
{
EmbeddingChanel.R, EmbeddingChanel.G, EmbeddingChanel.B
});
// Decoding
var deResult = de.BruteforceDecode(encodedImage, deConfig);
if (deResult != null)
{
return(deResult);
}
var hsResult = hs.Decode(encodedImage, hsConfig);
if (hsResult != null)
{
return(hsResult);
}
return(null);
}
private void BtnConfigHS_Click(object sender, RoutedEventArgs e)
{
if (isWatermarkingModeSelected())
{
HashSet <EmbeddingChanel> set = new HashSet <EmbeddingChanel>();
set.Add(EmbeddingChanel.R);
HistogramShiftingConfiguration config = new HistogramShiftingConfiguration(false, set);
var dialogBox = new ConfigurationDialogBox.HistogramShiftingConfiguraitonDialogBox(
config.EmbeddingChanels)
{
Owner = this,
};
dialogBox.ShowDialog();
if (dialogBox.DialogResult == true)
{
if (dialogBox.cbR.IsChecked == true)
{
HashSet <EmbeddingChanel> embeddingChanels = new HashSet <EmbeddingChanel>();
if (dialogBox.cbR.IsChecked == true)
{
embeddingChanels.Add(EmbeddingChanel.R);
}
if (dialogBox.cbG.IsChecked == true)
{
embeddingChanels.Add(EmbeddingChanel.G);
}
if (dialogBox.cbB.IsChecked == true)
{
embeddingChanels.Add(EmbeddingChanel.B);
}
currentEncodingHsConfiguration = new HistogramShiftingConfiguration(false, embeddingChanels);
}
}
}
if (isAnalyzingModeSelected())
{
HashSet <EmbeddingChanel> set = new HashSet <EmbeddingChanel>();
set.Add(EmbeddingChanel.R);
HistogramShiftingConfiguration config = new HistogramShiftingConfiguration(false, set);
var dialogBox = new ConfigurationDialogBox.HistogramShiftingConfiguraitonDecodingDialogBox(
config.EmbeddingChanels)
{
Owner = this,
};
dialogBox.ShowDialog();
if (dialogBox.DialogResult == true)
{
if (dialogBox.cbR.IsChecked == true)
{
HashSet <EmbeddingChanel> embeddingChanels = new HashSet <EmbeddingChanel>();
if (dialogBox.cbR.IsChecked == true)
{
embeddingChanels.Add(EmbeddingChanel.R);
}
if (dialogBox.cbG.IsChecked == true)
{
embeddingChanels.Add(EmbeddingChanel.G);
}
if (dialogBox.cbB.IsChecked == true)
{
embeddingChanels.Add(EmbeddingChanel.B);
}
currentDecodingHsConfiguration = new HistogramShiftingConfiguration(dialogBox.cbBruteforce.IsChecked == true, embeddingChanels);
}
}
}
}
