private void InsertDatasetItem(DcmItem item, DicomReadOptions options)
{
if (_sds.Count > 0 && _sds.Count == _sqs.Count)
{
DcmDataset ds = _sds.Peek();
if (_tag.Element == 0x0000)
{
if (Flags.IsSet(options, DicomReadOptions.KeepGroupLengths))
{
ds.AddItem(item);
}
}
else
{
ds.AddItem(item);
}
if (ds.StreamLength != UndefinedLength)
{
long end = ds.StreamPosition + ds.StreamLength;
if ((_stream.Position - _offset) >= end)
{
_sds.Pop();
}
}
}
else
{
if (_tag.Element == 0x0000)
{
if (Flags.IsSet(options, DicomReadOptions.KeepGroupLengths))
{
_dataset.AddItem(item);
}
}
else
{
_dataset.AddItem(item);
}
}
if (_tag == DicomTags.SpecificCharacterSet && item is DcmCodeString)
{
DcmCodeString cs = (DcmCodeString)item;
if (cs.Length > 0)
{
string[] values = cs.GetValues();
for (int i = 0; i < values.Length; i++)
{
if (String.IsNullOrEmpty(values[i]))
{
continue;
}
_encoding = DcmEncoding.GetEncodingForSpecificCharacterSet(values[i]);
break;
}
}
}
}
public void UpdateDataset(DcmDataset dataset)
{
if (_lossy)
{
DcmCodeString cs = dataset.GetCS(DicomTags.ImageType);
if (cs != null)
{
string[] values = cs.GetValues();
values[0] = "DERIVED";
cs.SetValues(values);
}
dataset.AddElementWithValue(DicomTags.SOPInstanceUID, DicomUID.Generate());
// FIXME: append existing values
dataset.AddElementWithValue(DicomTags.LossyImageCompression, "01");
dataset.AddElementWithValue(DicomTags.LossyImageCompressionMethod, _lossyMethod);
dataset.AddElementWithValue(DicomTags.LossyImageCompressionRatio, _lossyRatio);
}
dataset.AddElementWithValue(DicomTags.NumberOfFrames, _frames);
dataset.AddElementWithValue(DicomTags.Columns, _width);
dataset.AddElementWithValue(DicomTags.Rows, _height);
dataset.AddElementWithValue(DicomTags.HighBit, _highBit);
dataset.AddElementWithValue(DicomTags.BitsStored, _bitsStored);
dataset.AddElementWithValue(DicomTags.BitsAllocated, _bitsAllocated);
dataset.AddElementWithValue(DicomTags.SamplesPerPixel, _samplesPerPixel);
dataset.AddElementWithValue(DicomTags.PixelRepresentation, _pixelRepresentation);
dataset.AddElementWithValue(DicomTags.PhotometricInterpretation, _photometricInterpretation);
if (SamplesPerPixel == 1)
{
dataset.AddElementWithValue(DicomTags.RescaleSlope, _rescaleSlope);
dataset.AddElementWithValue(DicomTags.RescaleIntercept, _rescaleIntercept);
//if (_pixelPaddingValue != 0)
// dataset.AddElementWithValue(DicomTags.PixelPaddingValue, _pixelPaddingValue);
}
else
{
dataset.AddElementWithValue(DicomTags.PlanarConfiguration, _planarConfiguration);
}
dataset.AddItem(_pixelDataItem);
}