private void Rotate(ImageFactory imageFactory, ProcessingParameters parameters)
{
if (parameters.RotationAngle == 0)
{
return;
}
imageFactory.Rotate(parameters.RotationAngle);
}
private void Resize(ImageFactory imageFactory, ProcessingParameters parameters)
{
if (parameters.ScaleX == 1 && parameters.ScaleY == 1)
{
return;
}
var size = new Size((int)(imageFactory.Image.Width * parameters.ScaleX), (int)(imageFactory.Image.Height * parameters.ScaleY));
var resizeLayer = new ResizeLayer(size, ResizeMode.Stretch);
imageFactory.Resize(resizeLayer);
}
public Bitmap ProcessImage(Bitmap image, ProcessingParameters parameters)
{
using (var imageFactory = new ImageFactory(preserveExifData: true))
{
using (var stream = new MemoryStream())
{
image.Save(stream, ImageFormat.Png);
imageFactory.Load(stream);
Resize(imageFactory, parameters);
Crop(imageFactory, parameters);
Rotate(imageFactory, parameters);
imageFactory.Save(stream);
var result = new Bitmap(stream);
return(result);
}
}
}
/// <summary>
/// Выполняет один тест чтения скрываемого текста при искажении с указанными параметрами и возвращает его результат
/// </summary>
/// <param name="sourceImagePath">Путь к исходному изображению</param>
/// <param name="fullContainer">Заполненный контейнер</param>
/// <param name="hiddenText"></param>
/// <param name="encoder"></param>
/// <param name="parameters"></param>
/// <param name="saveProcessed"></param>
/// <returns></returns>
private RobustnessTestResult RunSingleTest(string sourceImagePath, Bitmap fullContainer, string hiddenText, IEncoder encoder, ProcessingParameters parameters, bool saveProcessed = true)
{
var processedImage = processor.ProcessImage(fullContainer, parameters);
var result = new RobustnessTestResult()
{
Parameters = parameters,
SourceImagePath = sourceImagePath
};
if (saveProcessed)
{
var processedPath = Path.Combine(
Path.GetDirectoryName(sourceImagePath),
"Processed",
string.Format("{0}_{1}{2}", Path.GetFileNameWithoutExtension(sourceImagePath), GetTimeStamp(), Path.GetExtension(sourceImagePath))
);
processedImage.Save(processedPath);
result.ProcessedImagePath = processedPath;
}
result.ErrorRateTransformed = errorEstimator.EstimateBitErrorRate(hiddenText, processedImage, encoder);
return(result);
}