/// <summary>
/// Processes the image.
/// </summary>
/// <param name="factory">The the current instance of the <see cref="T:ImageProcessor.ImageFactory" /> class containing
/// the image to process.</param>
/// <returns>
/// The processed image from the current instance of the <see cref="T:ImageProcessor.ImageFactory" /> class.
/// </returns>
public Image ProcessImage(ImageFactory factory)
{
string preset = this.DynamicParameter;
string querystring;
this.Settings.TryGetValue(preset.Split('=')[1], out querystring);
string oldQueryString = factory.QueryString;
string newQueryString = Regex.Replace(oldQueryString, preset, querystring ?? string.Empty);
return factory.AddQueryString(newQueryString).AutoProcess().Image;
}