private void cleanButton_Click(object sender, RoutedEventArgs e)
{
Bitmap image = null;
if (algorithmsComboBox.SelectedItem.ToString() == "LSB")
{
// LSB is not reversible - do nothing
}
else if (algorithmsComboBox.SelectedItem.ToString() == "Histogram shifting")
{
HSSettings tab = settingsTabControl.SelectedContent as HSSettings;
int minIndex = tab.getMinIndex();
int maxIndex = tab.getMaxIndex();
image = HS.Instance.Clean(new Bitmap(carrierViewer.filename), minIndex, maxIndex);
}
ImageFormat format = ImageFormat.Png;
SaveFileDialog sfd = new SaveFileDialog();
string ext = System.IO.Path.GetExtension(carrierViewer.filename);
switch (ext)
{
case ".png":
sfd.Filter = "Save Format|*.png";
format = ImageFormat.Png;
break;
case ".jpg":
sfd.Filter = "Save Format|*.jpg";
format = ImageFormat.Jpeg;
break;
case ".bmp":
sfd.Filter = "Save Format|*.bmp";
format = ImageFormat.Bmp;
break;
}
if (sfd.ShowDialog() == true)
{
image.Save(sfd.FileName);
}
}
private void decryptButton_Click(object sender, RoutedEventArgs e)
{
string message = null;
int imageHeight = 0;
int imageWidth = 0;
Bitmap drawnImage = null;
MessageType messageType = MessageType.Plaintext;
if (algorithmsComboBox.SelectedItem.ToString() == "LSB")
{
IOutputMessage messageInBits = LSB.Instance.Decode(new Bitmap(carrierViewer.filename));
messageType = messageInBits.GetHeaderData().GetMessageType();
string outputMessage = messageInBits.GetContent();
switch (messageType)
{
case MessageType.Plaintext:
message = AlgorithmUtility.bitMessageToText(outputMessage, (int)LSBHeaderConstants.PlainTextHeaderLength);
break;
case MessageType.BinaryImage:
message = outputMessage.Substring((int)LSBHeaderConstants.BinaryImageHeaderLength);
imageHeight = messageInBits.GetHeaderData().GetImageHeight();
imageWidth = messageInBits.GetHeaderData().GetImageWidth();
drawnImage = ImageDrawer.Instance.DrawBinaryImage(message, imageWidth, imageHeight);
break;
case MessageType.GrayscaleImage:
message = outputMessage.Substring((int)LSBHeaderConstants.GrayscaleImageHeaderLength);
imageHeight = messageInBits.GetHeaderData().GetImageHeight();
imageWidth = messageInBits.GetHeaderData().GetImageWidth();
drawnImage = ImageDrawer.Instance.DrawGrayscaleImage(message, imageWidth, imageHeight);
break;
case MessageType.ColorImage:
message = outputMessage.Substring((int)LSBHeaderConstants.ColorImageHeaderLength);
imageHeight = messageInBits.GetHeaderData().GetImageHeight();
imageWidth = messageInBits.GetHeaderData().GetImageWidth();
drawnImage = ImageDrawer.Instance.DrawColorImage(message, imageWidth, imageHeight);
break;
}
}
else if (algorithmsComboBox.SelectedItem.ToString() == "Histogram shifting")
{
HSSettings tab = settingsTabControl.SelectedContent as HSSettings;
int minIndex = tab.getMinIndex();
int maxIndex = tab.getMaxIndex();
IOutputMessage messageInBits = HS.Instance.Decode(new Bitmap(carrierViewer.filename), minIndex, maxIndex);
messageType = messageInBits.GetHeaderData().GetMessageType();
string outputMessage = messageInBits.GetContent();
switch (messageType)
{
case MessageType.Plaintext:
message = AlgorithmUtility.bitMessageToText(outputMessage, (int)HSHeaderConstants.PlainTextHeaderLength);
break;
case MessageType.BinaryImage:
message = outputMessage.Substring((int)HSHeaderConstants.BinaryImageHeaderLength);
imageHeight = messageInBits.GetHeaderData().GetImageHeight();
imageWidth = messageInBits.GetHeaderData().GetImageWidth();
drawnImage = ImageDrawer.Instance.DrawBinaryImage(message, imageWidth, imageHeight);
break;
case MessageType.GrayscaleImage:
message = outputMessage.Substring((int)HSHeaderConstants.GrayscaleImageHeaderLength);
imageHeight = messageInBits.GetHeaderData().GetImageHeight();
imageWidth = messageInBits.GetHeaderData().GetImageWidth();
drawnImage = ImageDrawer.Instance.DrawGrayscaleImage(message, imageWidth, imageHeight);
break;
case MessageType.ColorImage:
message = outputMessage.Substring((int)HSHeaderConstants.ColorImageHeaderLength);
imageHeight = messageInBits.GetHeaderData().GetImageHeight();
imageWidth = messageInBits.GetHeaderData().GetImageWidth();
drawnImage = ImageDrawer.Instance.DrawColorImage(message, imageWidth, imageHeight);
break;
}
}
// need to change this dynamically
if (messageType == MessageType.Plaintext)
{
messageTabControl.SelectedItem = messageTextBox;
TextBox tab = messageTabControl.SelectedContent as TextBox;
tab.Text = message;
//messageTextBox.selec = message;
}
else
{
messageTabControl.SelectedItem = messageImage;
Image tab = messageTabControl.SelectedContent as Image;
tab.Source = ToBitmapImage(drawnImage);
}
}
