+#else
+ unsigned int nx = rIF.nx();
+ unsigned int ny = rIF.ny();
+ ImageFileArray v = rIF.getArray();
+ if (! rIF.isComplex())
+ rIF.convertRealToComplex();
+ ImageFileArray vImag = rIF.getImaginaryArray();
+
+ if (! v || nx == 0 || ny == 0)
+ return false;
+
+ Projections* pProj = this;
+ if (m_geometry == Scanner::GEOMETRY_EQUIANGULAR || m_geometry == Scanner::GEOMETRY_EQUILINEAR)
+ pProj = interpolateToParallel();
+
+ int iInterpDet = nx;
+// int iInterpDet = pProj->m_nDet;
+ int iNumInterpDetWithZeros = ProcessSignal::addZeropadFactor (iInterpDet, iZeropad);
+
+ double dZeropadRatio = static_cast<double>(iNumInterpDetWithZeros) / static_cast<double>(iInterpDet);
+
+ fftw_plan plan = fftw_create_plan (iNumInterpDetWithZeros, FFTW_FORWARD, FFTW_IN_PLACE | FFTW_ESTIMATE | FFTW_USE_WISDOM);
+
+ fftw_complex* pcIn = new fftw_complex [iNumInterpDetWithZeros];
+ std::complex<double>** ppcDetValue = new std::complex<double>* [pProj->m_nView];
+ double dInterpScale = (pProj->m_nDet-1) / static_cast<double>(iInterpDet-1) / SQRT2;
+
+ double dFFTScale = 1. / static_cast<double>(iInterpDet * iInterpDet);
+ int iMidPoint = iInterpDet / 2;
+ double dMidPoint = static_cast<double>(iInterpDet) / 2.;
+ int iZerosAdded = iNumInterpDetWithZeros - iInterpDet;
+
+ // For each view, interpolate to nx length, shift to center at origin, and FFt transform
+ for (int iView = 0; iView < m_nView; iView++) {
+ DetectorValue* detval = pProj->getDetectorArray(iView).detValues();
+ LinearInterpolator<DetectorValue> projInterp (detval, pProj->m_nDet);
+ for (int iDet = 0; iDet < iInterpDet; iDet++) {
+ double dInterpPos = (m_nDet / 2.) + (iDet - dMidPoint) * dInterpScale;
+ pcIn[iDet].re = projInterp.interpolate (dInterpPos) * dInterpScale;
+ pcIn[iDet].im = 0;
+ }
+
+ Fourier::shuffleFourierToNaturalOrder (pcIn, iInterpDet);
+ if (iZerosAdded > 0) {
+ for (int iDet1 = iMidPoint; iDet1 < iInterpDet; iDet1++)
+ pcIn[iDet1+iZerosAdded] = pcIn[iDet1];
+ for (int iDet2 = iMidPoint; iDet2 < iMidPoint + iZerosAdded; iDet2++)
+ pcIn[iDet2].re = pcIn[iDet2].im = 0;
+ }
+
+ fftw_one (plan, pcIn, NULL);
+
+ ppcDetValue[iView] = new std::complex<double> [iNumInterpDetWithZeros];
+ for (int iD = 0; iD < iNumInterpDetWithZeros; iD++) {
+ ppcDetValue[iView][iD] = std::complex<double> (pcIn[iD].re * dFFTScale, pcIn[iD].im * dFFTScale);
+ }
+
+ Fourier::shuffleFourierToNaturalOrder (ppcDetValue[iView], iNumInterpDetWithZeros);
+ }
+ delete [] pcIn;
+
+ fftw_destroy_plan (plan);
+
+ Array2d<double> adView (nx, ny);
+ Array2d<double> adDet (nx, ny);
+ double** ppdView = adView.getArray();
+ double** ppdDet = adDet.getArray();
+ pProj->calcArrayPolarCoordinates (nx, ny, ppdView, ppdDet, iNumInterpDetWithZeros, dZeropadRatio,
+ pProj->m_detInc * dInterpScale);
+
+ pProj->interpolatePolar (v, vImag, nx, ny, ppcDetValue, ppdView, ppdDet, pProj->m_nView, pProj->m_nDet,
+ iNumInterpDetWithZeros, iInterpolationID);
+
+ if (m_geometry == Scanner::GEOMETRY_EQUIANGULAR || m_geometry == Scanner::GEOMETRY_EQUILINEAR)
+ delete pProj;
+
+ for (int i = 0; i < m_nView; i++)
+ delete [] ppcDetValue[i];
+ delete [] ppcDetValue;
+
+ return true;
+#endif
+}
+
+
+void
+Projections::calcArrayPolarCoordinates (unsigned int nx, unsigned int ny, double** ppdView, double** ppdDet,
+ int iNumDetWithZeros, double dZeropadRatio, double dDetInc)
+{
+ double dLength = viewDiameter();
+// double dLength = phmLen();
+ double xMin = -dLength / 2;
+ double xMax = xMin + dLength;
+ double yMin = -dLength / 2;
+ double yMax = yMin + dLength;
+ double xCent = (xMin + xMax) / 2;
+ double yCent = (yMin + yMax) / 2;
+
+ xMin = (xMin - xCent) * dZeropadRatio + xCent;
+ xMax = (xMax - xCent) * dZeropadRatio + xCent;
+ yMin = (yMin - yCent) * dZeropadRatio + yCent;
+ yMax = (yMax - yCent) * dZeropadRatio + yCent;
+
+ double xInc = (xMax - xMin) / nx; // size of cells
+ double yInc = (yMax - yMin) / ny;
+
+ // +1 is correct for frequency data, ndet-1 is correct for projections
+ int iDetCenter = (iNumDetWithZeros - 1) / 2; // index refering to L=0 projection
+ if (isEven (iNumDetWithZeros))
+ iDetCenter = (iNumDetWithZeros + 1) / 2;
+
+ // Calculates polar coordinates (view#, det#) for each point on phantom grid
+ double x = xMin + xInc / 2; // Rectang coords of center of pixel
+ for (unsigned int ix = 0; ix < nx; x += xInc, ix++) {
+ double y = yMin + yInc / 2;
+ for (unsigned int iy = 0; iy < ny; y += yInc, iy++) {
+ double r = ::sqrt (x * x + y * y);
+ double phi = atan2 (y, x);
+
+ if (phi < 0)
+ phi += TWOPI;
+ if (phi >= PI) {
+ phi -= PI;
+ r = -r;
+ }
+
+ ppdView[ix][iy] = (phi - m_rotStart) / m_rotInc;
+ ppdDet[ix][iy] = (r / dDetInc) + iDetCenter;
+ }
+ }
+}
+
+void
+Projections::interpolatePolar (ImageFileArray& v, ImageFileArray& vImag,
+ unsigned int nx, unsigned int ny, std::complex<double>** ppcDetValue, double** ppdView,
+ double** ppdDet, unsigned int nView, unsigned int nDet, unsigned int nDetWithZeros, int iInterpolationID)
+{
+ typedef std::complex<double> complexValue;
+
+ BilinearInterpolator<complexValue>* pBilinear = NULL;
+ if (iInterpolationID == POLAR_INTERP_BILINEAR)
+ pBilinear = new BilinearInterpolator<complexValue> (ppcDetValue, nView, nDetWithZeros);
+
+ BicubicPolyInterpolator<complexValue>* pBicubic;
+ if (iInterpolationID == POLAR_INTERP_BICUBIC)
+ pBicubic = new BicubicPolyInterpolator<complexValue> (ppcDetValue, nView, nDetWithZeros);
+
+ for (unsigned int ix = 0; ix < ny; ix++) {
+ for (unsigned int iy = 0; iy < ny; iy++) {
+
+ if (iInterpolationID == POLAR_INTERP_NEAREST) {
+ unsigned int iView = nearest<int> (ppdView[ix][iy]);
+ unsigned int iDet = nearest<int> (ppdDet[ix][iy]);
+ if (iView == nView) {
+ iView = 0;
+ iDet = m_nDet - iDet;
+ }
+ if (iDet >= 0 && iDet < nDetWithZeros && iView >= 0 && iView < nView) {
+ v[ix][iy] = ppcDetValue[iView][iDet].real();
+ if (vImag)
+ vImag[ix][iy] = ppcDetValue[iView][iDet].imag();
+ } else
+ v[ix][iy] = 0;
+
+ } else if (iInterpolationID == POLAR_INTERP_BILINEAR) {
+ std::complex<double> vInterp = pBilinear->interpolate (ppdView[ix][iy], ppdDet[ix][iy]);
+ v[ix][iy] = vInterp.real();
+ if (vImag)
+ vImag[ix][iy] = vInterp.imag();
+ } else if (iInterpolationID == POLAR_INTERP_BICUBIC) {
+ std::complex<double> vInterp = pBicubic->interpolate (ppdView[ix][iy], ppdDet[ix][iy]);
+ v[ix][iy] = vInterp.real();
+ if (vImag)
+ vImag[ix][iy] = vInterp.imag();
+ }
+ }
+ }
+}
+
+bool
+Projections::initFromSomatomAR_STAR (int iNViews, int iNDets, unsigned char* pData, unsigned long lDataLength)
+{
+ init (iNViews, iNDets);
+ m_geometry = Scanner::GEOMETRY_EQUIANGULAR;
+ m_dFocalLength = 510;
+ m_dSourceDetectorLength = 890;
+ m_detInc = convertDegreesToRadians (3.06976 / 60);
+ m_dFanBeamAngle = iNDets * m_detInc;
+ m_detStart = -(m_dFanBeamAngle / 2);
+ m_rotInc = TWOPI / static_cast<double>(iNViews);
+ m_rotStart = 0;
+ m_dViewDiameter = sin (m_dFanBeamAngle / 2) * m_dFocalLength * 2;
+
+ if (! ((iNViews == 750 && lDataLength == 1560000L) || (iNViews == 950 && lDataLength == 1976000L)
+ || (iNViews == 1500 && lDataLength == 3120000)))
+ return false;
+
+ double dCenter = (iNDets - 1.) / 2.; // change from (Nm+1)/2 because of 0 vs. 1 indexing
+ double* pdCosScale = new double [iNDets];
+ for (int i = 0; i < iNDets; i++)
+ pdCosScale[i] = 1. / cos ((i - dCenter) * m_detInc);
+
+ long lDataPos = 0;
+ for (int iv = 0; iv < iNViews; iv++) {
+ unsigned char* pArgBase = pData + lDataPos;
+ unsigned char* p = pArgBase+0; SwapBytes4IfLittleEndian (p);
+ // long lProjNumber = *reinterpret_cast<long*>(p);
+
+ p = pArgBase+20; SwapBytes4IfLittleEndian (p);
+ long lEscale = *reinterpret_cast<long*>(p);
+
+ p = pArgBase+28; SwapBytes4IfLittleEndian (p);
+ // long lTime = *reinterpret_cast<long*>(p);
+
+ p = pArgBase + 4; SwapBytes4IfLittleEndian (p);
+ double dAlpha = *reinterpret_cast<float*>(p) + HALFPI;
+
+ p = pArgBase+12; SwapBytes4IfLittleEndian (p);
+ // double dAlign = *reinterpret_cast<float*>(p);
+
+ p = pArgBase + 16; SwapBytes4IfLittleEndian (p);
+ // double dMaxValue = *reinterpret_cast<float*>(p);
+
+ DetectorArray& detArray = getDetectorArray (iv);
+ detArray.setViewAngle (dAlpha);
+ DetectorValue* detval = detArray.detValues();
+
+ double dViewScale = 1. / (2294.4871 * ::pow (2.0, -lEscale));
+ lDataPos += 32;
+ for (int id = 0; id < iNDets; id++) {
+ int iV = pData[lDataPos+1] + (pData[lDataPos] << 8);
+ if (iV > 32767) // two's complement signed conversion
+ iV = iV - 65536;
+ detval[id] = iV * dViewScale * pdCosScale[id];
+ lDataPos += 2;
+ }
+#if 1
+ for (int k = iNDets - 2; k >= 0; k--)
+ detval[k+1] = detval[k];
+ detval[0] = 0;
+#endif
+ }
+
+ delete pdCosScale;
+ return true;
+}
+
+Projections*
+Projections::interpolateToParallel () const
+{
+ if (m_geometry == Scanner::GEOMETRY_PARALLEL)
+ return const_cast<Projections*>(this);
+
+ int nDet = m_nDet;
+ int nView = m_nView;
+ Projections* pProjNew = new Projections (nView, nDet);
+ pProjNew->m_geometry = Scanner::GEOMETRY_PARALLEL;
+ pProjNew->m_dFocalLength = m_dFocalLength;
+ pProjNew->m_dSourceDetectorLength = m_dSourceDetectorLength;
+ pProjNew->m_dViewDiameter = m_dViewDiameter;
+ pProjNew->m_dFanBeamAngle = m_dFanBeamAngle;
+ pProjNew->m_calcTime = 0;
+ pProjNew->m_remark = m_remark;
+ pProjNew->m_remark += "; Interpolate to Parallel";
+ pProjNew->m_label.setLabelType (Array2dFileLabel::L_HISTORY);
+ pProjNew->m_label.setLabelString (pProjNew->m_remark);
+ pProjNew->m_label.setCalcTime (pProjNew->m_calcTime);
+ pProjNew->m_label.setDateTime (pProjNew->m_year, pProjNew->m_month, pProjNew->m_day, pProjNew->m_hour, pProjNew->m_minute, pProjNew->m_second);
+
+ pProjNew->m_rotStart = 0;
+#ifdef CONVERT_PARALLEL_PI
+ pProjNew->m_rotInc = PI / nView;;
+#else
+ pProjNew->m_rotInc = TWOPI / nView;
+#endif
+ pProjNew->m_detStart = -m_dViewDiameter / 2;
+ pProjNew->m_detInc = m_dViewDiameter / nDet;
+ if (isEven (nDet)) // even
+ pProjNew->m_detInc = m_dViewDiameter / (nDet - 1);
+
+ ParallelRaysums parallel (this, ParallelRaysums::THETA_RANGE_NORMALIZE_TO_TWOPI);
+
+ double* pdThetaValuesForT = new double [pProjNew->nView()];
+ double* pdRaysumsForT = new double [pProjNew->nView()];
+
+ // interpolate to evenly spaced theta (views)
+ double dDetPos = pProjNew->m_detStart;
+ for (int iD = 0; iD < pProjNew->nDet(); iD++, dDetPos += pProjNew->m_detInc) {
+ parallel.getThetaAndRaysumsForT (iD, pdThetaValuesForT, pdRaysumsForT);
+
+ double dViewAngle = m_rotStart;
+ int iLastFloor = -1;
+ LinearInterpolator<double> interp (pdThetaValuesForT, pdRaysumsForT, pProjNew->nView(), false);
+ for (int iV = 0; iV < pProjNew->nView(); iV++, dViewAngle += pProjNew->m_rotInc) {
+ DetectorValue* detValues = pProjNew->getDetectorArray (iV).detValues();
+ detValues[iD] = interp.interpolate (dViewAngle, &iLastFloor);
+ }
+ }
+ delete pdThetaValuesForT;
+ delete pdRaysumsForT;
+
+ // interpolate to evenly space t (detectors)
+ double* pdOriginalDetPositions = new double [pProjNew->nDet()];
+ parallel.getDetPositions (pdOriginalDetPositions);
+
+ double* pdDetValueCopy = new double [pProjNew->nDet()];
+ double dViewAngle = m_rotStart;
+ for (int iV = 0; iV < pProjNew->nView(); iV++, dViewAngle += pProjNew->m_rotInc) {
+ DetectorArray& detArray = pProjNew->getDetectorArray (iV);
+ DetectorValue* detValues = detArray.detValues();
+ detArray.setViewAngle (dViewAngle);
+
+ for (int i = 0; i < pProjNew->nDet(); i++)
+ pdDetValueCopy[i] = detValues[i];
+
+ double dDetPos = pProjNew->m_detStart;
+ int iLastFloor = -1;
+ LinearInterpolator<double> interp (pdOriginalDetPositions, pdDetValueCopy, pProjNew->nDet(), false);
+ for (int iD = 0; iD < pProjNew->nDet(); iD++, dDetPos += pProjNew->m_detInc)
+ detValues[iD] = interp.interpolate (dDetPos, &iLastFloor);
+ }
+ delete pdDetValueCopy;
+ delete pdOriginalDetPositions;
+
+ return pProjNew;
+}
+
+
+///////////////////////////////////////////////////////////////////////////////
+//
+// Class ParallelRaysums
+//
+// Used for converting divergent beam raysums into Parallel raysums
+//
+///////////////////////////////////////////////////////////////////////////////
+
+ParallelRaysums::ParallelRaysums (const Projections* pProjections, int iThetaRange)
+: m_pCoordinates(NULL), m_iNumCoordinates(0), m_iNumView(pProjections->nView()), m_iNumDet(pProjections->nDet()),
+ m_iThetaRange (iThetaRange)
+{
+ int iGeometry = pProjections->geometry();
+ double dDetInc = pProjections->detInc();
+ double dDetStart = pProjections->detStart();
+ double dFocalLength = pProjections->focalLength();
+
+ m_iNumCoordinates = m_iNumView * m_iNumDet;
+ m_pCoordinates = new ParallelRaysumCoordinate [m_iNumCoordinates];
+ m_vecpCoordinates.reserve (m_iNumCoordinates);
+ for (int i = 0; i < m_iNumCoordinates; i++)
+ m_vecpCoordinates[i] = m_pCoordinates + i;
+
+ int iCoordinate = 0;
+ for (int iV = 0; iV < m_iNumView; iV++) {
+ double dViewAngle = pProjections->getDetectorArray(iV).viewAngle();
+ const DetectorValue* detValues = pProjections->getDetectorArray(iV).detValues();
+
+ double dDetPos = dDetStart;
+ for (int iD = 0; iD < m_iNumDet; iD++) {
+ ParallelRaysumCoordinate* pC = m_vecpCoordinates[iCoordinate++];
+
+ if (iGeometry == Scanner::GEOMETRY_PARALLEL) {
+ pC->m_dTheta = dViewAngle;
+ pC->m_dT = dDetPos;
+ } else if (iGeometry == Scanner::GEOMETRY_EQUILINEAR) {
+ double dFanAngle = atan (dDetPos / pProjections->sourceDetectorLength());
+ pC->m_dTheta = dViewAngle + dFanAngle;
+ pC->m_dT = dFocalLength * sin(dFanAngle);
+
+ } else if (iGeometry == Scanner::GEOMETRY_EQUIANGULAR) {
+ // fan angle is same as dDetPos
+ pC->m_dTheta = dViewAngle + dDetPos;
+ pC->m_dT = dFocalLength * sin (dDetPos);
+ }
+ if (m_iThetaRange != THETA_RANGE_UNCONSTRAINED) {
+ pC->m_dTheta = normalizeAngle (pC->m_dTheta);
+ if (m_iThetaRange == THETA_RANGE_FOLD_TO_PI && pC->m_dTheta >= PI) {
+ pC->m_dTheta -= PI;
+ pC->m_dT = -pC->m_dT;
+ }
+ }
+ pC->m_dRaysum = detValues[iD];
+ dDetPos += dDetInc;
+ }
+ }