private DicomDataset Encode(DicomDataset oldDataset, DicomTransferSyntax inSyntax, IDicomCodec codec, DicomCodecParams parameters)
{
DicomPixelData oldPixelData = DicomPixelData.Create(oldDataset, false);
DicomDataset newDataset = oldDataset.Clone();
newDataset.InternalTransferSyntax = codec.TransferSyntax;
DicomPixelData newPixelData = DicomPixelData.Create(newDataset, true);
codec.Encode(oldPixelData, newPixelData, parameters);
if (codec.TransferSyntax.IsLossy && newPixelData.NumberOfFrames > 0)
{
newDataset.Add(new DicomCodeString(DicomTag.LossyImageCompression, "01"));
List <string> methods = new List <string>();
if (newDataset.Exists(DicomTag.LossyImageCompressionMethod))
{
methods.AddRange(newDataset.Get <string[]>(DicomTag.LossyImageCompressionMethod));
}
methods.Add(codec.TransferSyntax.LossyCompressionMethod);
newDataset.Add(new DicomCodeString(DicomTag.LossyImageCompressionMethod, methods.ToArray()));
double oldSize = oldPixelData.GetFrame(0).Size;
double newSize = newPixelData.GetFrame(0).Size;
string ratio = String.Format("{0:0.000}", oldSize / newSize);
newDataset.Add(new DicomDecimalString(DicomTag.LossyImageCompressionRatio, ratio));
}
return(newDataset);
}
