/// <summary>
/// Extracts the secret text message.
/// </summary>
public async Task ExtractSecretMessage()
{
var modifiedImageData = await ImageUtilities.GetImageData(this.ModifiedImage);
if (HeaderUtilities.IsMessageEmbedded(modifiedImageData, this.ModifiedImage.PixelWidth) &&
HeaderUtilities.GetMessageType(modifiedImageData, this.ModifiedImage.PixelWidth) == MessageType.Text)
{
var textEncoder =
new TextEncoder(
HeaderUtilities.GetBitsPerColorChannel(modifiedImageData, this.ModifiedImage.PixelWidth));
this.SecretMessage = textEncoder.DecodeMessage(modifiedImageData);
}
else
{
throw new ArgumentException("Modified Image doesn't contain Secret Text Message");
}
}