Exemplo n.º 1
0
        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);
            }
        }
Exemplo n.º 2
0
        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);
            }
        }