Method PixelDataCallback

Utilities/DICOMParser/DICOMAppHelper.cxx:808–923

}

void DICOMAppHelper::PixelDataCallback(
  DICOMParser*, doublebyte, doublebyte, DICOMParser::VRTypes, unsigned char* data, quadbyte len)
{
  int numPixels = this->Dimensions[0] * this->Dimensions[1] * this->GetNumberOfComponents();
  numPixels = std::min(len, numPixels);
  numPixels = std::max(numPixels, 0);

#ifdef DEBUG_DICOM_APP_HELPER
  std::cout << "numPixels : " << numPixels << std::endl;
#endif

  int ptrIncr = int(this->BitsAllocated / 8.0);

  unsigned short* ushortInputData = reinterpret_cast<unsigned short*>(data);
  unsigned char* ucharInputData = data;
  short* shortInputData = reinterpret_cast<short*>(data);

  float* floatOutputData; // = nullptr;

  bool isFloat = this->RescaledImageDataIsFloat();

  if (isFloat)
  {
#ifdef DEBUG_DICOM_APP_HELPER
    std::cout << "Slope and offset are not integer valued : ";
    std::cout << this->RescaleSlope << ", " << this->RescaleOffset << std::endl;
#endif
    delete[] (static_cast<char*>(this->ImageData));
    this->ImageData = new float[numPixels];
    floatOutputData = static_cast<float*>(this->ImageData);

    this->ImageDataType = DICOMParser::VR_FL;
    unsigned long uNumPixels = static_cast<unsigned long>(numPixels);
    this->ImageDataLengthInBytes = uNumPixels * sizeof(float);
    float newFloatPixel;

    if (ptrIncr == 1)
    {
      for (int i = 0; i < numPixels; i++)
      {
        newFloatPixel = float(static_cast<double>(this->RescaleSlope) * ucharInputData[i] +
          static_cast<double>(this->RescaleOffset));
        floatOutputData[i] = newFloatPixel;
      }
#ifdef DEBUG_DICOM_APP_HELPER
      std::cout << "Did rescale, offset to float from char." << std::endl;
      std::cout << numPixels << " pixels." << std::endl;
#endif
    }
    else if (ptrIncr == 2)
    {
      for (int i = 0; i < numPixels; i++)
      {
        newFloatPixel = float(static_cast<double>(this->RescaleSlope) * ushortInputData[i] +
          static_cast<double>(this->RescaleOffset));
        floatOutputData[i] = newFloatPixel;
      }
#ifdef DEBUG_DICOM_APP_HELPER