/// <summary>
/// Constructor.
/// </summary>
/// <param name="collection"></param>
protected DicomPixelData(DicomAttributeCollection collection)
{
collection.LoadDicomFields(this);
SopClass = SopClass.GetSopClass(collection[DicomTags.SopClassUid].GetString(0, string.Empty));
if (collection.Contains(DicomTags.NumberOfFrames))
NumberOfFrames = collection[DicomTags.NumberOfFrames].GetInt32(0, 1);
if (collection.Contains(DicomTags.PlanarConfiguration))
PlanarConfiguration = collection[DicomTags.PlanarConfiguration].GetUInt16(0, 1);
if (collection.Contains(DicomTags.LossyImageCompression))
LossyImageCompression = collection[DicomTags.LossyImageCompression].GetString(0, string.Empty);
if (collection.Contains(DicomTags.LossyImageCompressionRatio))
LossyImageCompressionRatio = collection[DicomTags.LossyImageCompressionRatio].GetFloat32(0, 1.0f);
if (collection.Contains(DicomTags.LossyImageCompressionMethod))
LossyImageCompressionMethod = collection[DicomTags.LossyImageCompressionMethod].GetString(0, string.Empty);
if (collection.Contains(DicomTags.DerivationDescription))
DerivationDescription = collection[DicomTags.DerivationDescription].GetString(0, string.Empty);
if (collection.Contains(DicomTags.RescaleSlope))
RescaleSlope = collection[DicomTags.RescaleSlope].ToString();
if (collection.Contains(DicomTags.RescaleIntercept))
RescaleIntercept = collection[DicomTags.RescaleIntercept].ToString();
if (collection.Contains(DicomTags.ModalityLutSequence))
{
DicomAttribute attrib = collection[DicomTags.ModalityLutSequence];
_hasDataModalityLut = !attrib.IsEmpty && !attrib.IsNull;
}
_linearVoiLuts = Window.GetWindowCenterAndWidth(collection);
if (collection.Contains(DicomTags.VoiLutSequence))
{
DicomAttribute attrib = collection[DicomTags.VoiLutSequence];
_hasDataVoiLuts = !attrib.IsEmpty && !attrib.IsNull;
}
if (PhotometricInterpretation.Equals(Iod.PhotometricInterpretation.PaletteColor.Code) && collection.Contains(DicomTags.RedPaletteColorLookupTableDescriptor))
{
_paletteColorLut = PaletteColorLut.Create(collection);
_hasPaletteColorLut = true;
}
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="attrib"></param>
internal DicomPixelData(DicomPixelData attrib)
{
SopClass = attrib.SopClass;
NumberOfFrames = attrib.NumberOfFrames;
ImageWidth = attrib.ImageWidth;
ImageHeight = attrib.ImageHeight;
HighBit = attrib.HighBit;
BitsStored = attrib.BitsStored;
BitsAllocated = attrib.BitsAllocated;
SamplesPerPixel = attrib.SamplesPerPixel;
PixelRepresentation = attrib.PixelRepresentation;
PlanarConfiguration = attrib.PlanarConfiguration;
PhotometricInterpretation = attrib.PhotometricInterpretation;
LossyImageCompression = attrib.LossyImageCompression;
DerivationDescription = attrib.DerivationDescription;
LossyImageCompressionRatio = attrib.LossyImageCompressionRatio;
LossyImageCompressionMethod = attrib.LossyImageCompressionMethod;
RescaleSlope = attrib.RescaleSlope;
RescaleIntercept = attrib.RescaleIntercept;
_hasDataModalityLut = attrib.HasDataModalityLut;
_hasDataVoiLuts = attrib.HasDataVoiLuts;
_hasPaletteColorLut = attrib.HasPaletteColorLut;
_paletteColorLut = attrib.PaletteColorLut;
foreach (Window window in attrib.LinearVoiLuts)
_linearVoiLuts.Add(new Window(window));
}
/// <summary>
/// Convert Palette Color pixel data to RGB.
/// </summary>
/// <param name="bitsAllocated"></param>
/// <param name="isSigned"></param>
/// <param name="srcPixelData"></param>
/// <param name="rgbPixelData"></param>
/// <param name="lut"></param>
public static unsafe void PaletteColorToRgb(
int bitsAllocated,
bool isSigned,
byte[] srcPixelData,
byte[] rgbPixelData,
PaletteColorLut lut)
{
Platform.CheckTrue(bitsAllocated == 8 || bitsAllocated == 16, "Valid Bits Allocated");
Platform.CheckForNullReference(srcPixelData, "srcPixelData");
Platform.CheckForNullReference(rgbPixelData, "rgbPixelData");
Platform.CheckForNullReference(lut, "lut");
int sizeInPixels = rgbPixelData.Length/3;
const string messageInvalidBufferSize = "Invalid destination buffer size";
if (bitsAllocated == 8 && 3*srcPixelData.Length != rgbPixelData.Length)
throw new ArgumentException(messageInvalidBufferSize, "rgbPixelData");
if (bitsAllocated > 8 && srcPixelData.Length/2 != sizeInPixels)
throw new ArgumentException(messageInvalidBufferSize, "rgbPixelData");
int firstPixelMapped = lut.FirstMappedPixelValue;
fixed (byte* pSrcPixelData = srcPixelData)
{
fixed (byte* pRgbPixelData = rgbPixelData)
{
int dst = 0;
if (bitsAllocated == 8)
{
if (isSigned)
{
// 8-bit signed
for (int i = 0; i < sizeInPixels; i++)
{
Color value = lut.Data[((sbyte*) pSrcPixelData)[i] - firstPixelMapped];
pRgbPixelData[dst] = value.R;
pRgbPixelData[dst + 1] = value.G;
pRgbPixelData[dst + 2] = value.B;
dst += 3;
}
}
else
{
// 8-bit unsigned
for (int i = 0; i < sizeInPixels; i++)
{
Color value = lut.Data[pSrcPixelData[i] - firstPixelMapped];
pRgbPixelData[dst] = value.R;
pRgbPixelData[dst + 1] = value.G;
pRgbPixelData[dst + 2] = value.B;
dst += 3;
}
}
}
else
{
if (isSigned)
{
// 16-bit signed
for (int i = 0; i < sizeInPixels; i++)
{
Color value = lut.Data[((short*) pSrcPixelData)[i] - firstPixelMapped];
pRgbPixelData[dst] = value.R;
pRgbPixelData[dst + 1] = value.G;
pRgbPixelData[dst + 2] = value.B;
dst += 3;
}
}
else
{
// 16-bit unsinged
for (int i = 0; i < sizeInPixels; i++)
{
Color value = lut.Data[((ushort*) pSrcPixelData)[i] - firstPixelMapped];
pRgbPixelData[dst] = value.R;
pRgbPixelData[dst + 1] = value.G;
pRgbPixelData[dst + 2] = value.B;
dst += 3;
}
}
}
}
}
}