** This is part of the CTSim program
** Copyright (C) 1983-2000 Kevin Rosenberg
**
-** $Id: projections.cpp,v 1.28 2000/12/06 01:46:43 kevin Exp $
+** $Id: projections.cpp,v 1.38 2001/01/06 15:33:15 kevin Exp $
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License (version 2) as
******************************************************************************/
#include "ct.h"
-\r
-const kuint16 Projections::m_signature = ('P'*256 + 'J');\r
+
+const kuint16 Projections::m_signature = ('P'*256 + 'J');
+
+const int Projections::POLAR_INTERP_INVALID = -1;
+const int Projections::POLAR_INTERP_NEAREST = 0;
+const int Projections::POLAR_INTERP_BILINEAR = 1;
+const int Projections::POLAR_INTERP_BICUBIC = 2;
+
+const char* Projections::s_aszInterpName[] =
+{
+ {"nearest"},
+ {"bilinear"},
+// {"bicubic"},
+};
+
+const char* Projections::s_aszInterpTitle[] =
+{
+ {"Nearest"},
+ {"Bilinear"},
+// {"Bicubic"},
+};
+
+const int Projections::s_iInterpCount = sizeof(s_aszInterpName) / sizeof(char*);
+
/* NAME
- * Projections Constructor for projections matrix storage
- *
- * SYNOPSIS
- * proj = projections_create (filename, nView, nDet)
- * Projections& proj Allocated projections structure & matrix
- * int nView Number of rotated view
- * int nDet Number of detectors
- *
- */
+* Projections Constructor for projections matrix storage
+*
+* SYNOPSIS
+* proj = projections_create (filename, nView, nDet)
+* Projections& proj Allocated projections structure & matrix
+* int nView Number of rotated view
+* int nDet Number of detectors
+*
+*/
Projections::Projections (const Scanner& scanner)
- : m_projData(0)
+: m_projData(0)
{
initFromScanner (scanner);
}
Projections::Projections (const int nView, const int nDet)
- : m_projData(0)
+: m_projData(0)
{
init (nView, nDet);
}
Projections::Projections (void)
- : m_projData(0)
+: m_projData(0)
{
init (0, 0);
}
deleteProjData();
}
+int
+Projections::convertInterpNameToID (const char* const interpName)
+{
+ int interpID = POLAR_INTERP_INVALID;
+
+ for (int i = 0; i < s_iInterpCount; i++)
+ if (strcasecmp (interpName, s_aszInterpName[i]) == 0) {
+ interpID = i;
+ break;
+ }
+
+ return (interpID);
+}
+
+const char*
+Projections::convertInterpIDToName (const int interpID)
+{
+ static const char *interpName = "";
+
+ if (interpID >= 0 && interpID < s_iInterpCount)
+ return (s_aszInterpName[interpID]);
+
+ return (interpName);
+}
+
+const char*
+Projections::convertInterpIDToTitle (const int interpID)
+{
+ static const char *interpTitle = "";
+
+ if (interpID >= 0 && interpID < s_iInterpCount)
+ return (s_aszInterpTitle[interpID]);
+
+ return (interpTitle);
+}
+
+
void
Projections::init (const int nView, const int nDet)
m_nView = nView;
m_nDet = nDet;
newProjData ();
+
+ time_t t = time (NULL);
+ tm* lt = localtime (&t);
+ m_year = lt->tm_year;
+ m_month = lt->tm_mon;
+ m_day = lt->tm_mday;
+ m_hour = lt->tm_hour;
+ m_minute = lt->tm_min;
+ m_second = lt->tm_sec;
}
void
m_label.setLabelType (Array2dFileLabel::L_HISTORY);
deleteProjData();
init (scanner.nView(), scanner.nDet());
-
+
m_phmLen = scanner.phmLen();
m_rotInc = scanner.rotInc();
m_detInc = scanner.detInc();
m_fieldOfView = scanner.fieldOfView();
m_rotStart = 0;
m_detStart = -(scanner.detLen() / 2);
-#if 0
- if (m_geometry == Scanner::GEOMETRY_EQUILINEAR) {
- m_detInc /= 2;
- cout << "Kludge: detInc /= 2 in Projections::initFromScanner" << endl;
- }
-#endif
}
void
{
if (m_projData)
sys_error(ERR_WARNING, "m_projData != NULL [newProjData]");
-
+
if (m_nView > 0 && m_nDet) {
m_projData = new DetectorArray* [m_nView];
-
+
for (int i = 0; i < m_nView; i++)
m_projData[i] = new DetectorArray (m_nDet);
}
/* NAME
- * projections_free Free memory allocated to projections
- *
- * SYNOPSIS
- * projections_free(proj)
- * Projections& proj Projectionss to be deallocated
- */
+* projections_free Free memory allocated to projections
+*
+* SYNOPSIS
+* projections_free(proj)
+* Projections& proj Projectionss to be deallocated
+*/
void
Projections::deleteProjData (void)
if (m_projData != NULL) {
for (int i = 0; i < m_nView; i++)
delete m_projData[i];
-
+
delete m_projData;
m_projData = NULL;
}
/* NAME
- * Projections::headerWwrite Write data header for projections file
- *
- */
+* Projections::headerWwrite Write data header for projections file
+*
+*/
bool
Projections::headerWrite (fnetorderstream& fs)
kuint16 _hour = m_hour;
kuint16 _minute = m_minute;
kuint16 _second = m_second;
-
+
kfloat64 _calcTime = m_calcTime;
kfloat64 _rotStart = m_rotStart;
kfloat64 _rotInc = m_rotInc;
kfloat64 _phmLen = m_phmLen;
kfloat64 _fieldOfView = m_fieldOfView;
kfloat64 _focalLength = m_focalLength;
-
+
fs.seekp(0);
if (! fs)
return false;
-
+
fs.writeInt16 (_hsize);
fs.writeInt16 (_signature);
fs.writeInt32 (_nView);
fs.writeInt16 (_second);
fs.writeInt16 (_remarksize);
fs.write (m_remark.c_str(), _remarksize);
-
+
m_headerSize = fs.tellp();
_hsize = m_headerSize;
fs.seekp(0);
fs.writeInt16 (_hsize);
if (! fs)
- return false;
+ return false;
return true;
}
/* NAME
- * projections_read_header Read data header for projections file
- *
- */
+* projections_read_header Read data header for projections file
+*
+*/
bool
Projections::headerRead (fnetorderstream& fs)
{
fs.seekg(0);
if (! fs)
- return false;
-
+ return false;
+
fs.readInt16 (_hsize);
fs.readInt16 (_signature);
fs.readInt32 (_nView);
fs.readInt16 (_minute);
fs.readInt16 (_second);
fs.readInt16 (_remarksize);
-
+
if (! fs) {
- sys_error (ERR_SEVERE, "Error reading header information , _remarksize=%d [projections_read_header]", _remarksize);
- return false;
+ sys_error (ERR_SEVERE, "Error reading header information , _remarksize=%d [projections_read_header]", _remarksize);
+ return false;
}
-
+
if (_signature != m_signature) {
sys_error (ERR_SEVERE, "File %s does not have a valid projection file signature", m_filename.c_str());
return false;
}
-
+
char* pszRemarkStorage = new char [_remarksize+1];
fs.read (pszRemarkStorage, _remarksize);
if (! fs) {
}
pszRemarkStorage[_remarksize] = 0;
m_remark = pszRemarkStorage;
- delete pszRemarkStorage;\r
-
+ delete pszRemarkStorage;
+
off_t _hsizeread = fs.tellg();
if (!fs || _hsizeread != _hsize) {
- sys_error (ERR_WARNING, "File header size read %ld != file header size stored %ld [read_projections_header]\n_remarksize=%ld", (long int) _hsizeread, _hsize, _remarksize);
- return false;
+ sys_error (ERR_WARNING, "File header size read %ld != file header size stored %ld [read_projections_header]\n_remarksize=%ld", (long int) _hsizeread, _hsize, _remarksize);
+ return false;
}
m_headerSize = _hsize;
m_hour = _hour;
m_minute = _minute;
m_second = _second;
-
+
m_label.setLabelType (Array2dFileLabel::L_HISTORY);
m_label.setLabelString (m_remark);
m_label.setCalcTime (m_calcTime);
m_label.setDateTime (m_year, m_month, m_day, m_hour, m_minute, m_second);
-
+
return true;
}
bool
-Projections::read (const string& filename)
+Projections::read (const std::string& filename)
{
return read (filename.c_str());
}
bool
Projections::read (const char* filename)
{
- frnetorderstream fileRead (filename, ios::in | ios::binary);
m_filename = filename;
-
- if (! fileRead)
+#ifdef MSVC
+ frnetorderstream fileRead (m_filename.c_str(), std::ios::in | std::ios::binary);
+#else
+ frnetorderstream fileRead (m_filename.c_str(), std::ios::in | std::ios::binary | std::ios::nocreate);
+#endif
+
+ if (fileRead.fail())
return false;
-
+
if (! headerRead (fileRead))
return false;
-
+
deleteProjData ();
newProjData();
-
+
for (int i = 0; i < m_nView; i++) {
if (! detarrayRead (fileRead, *m_projData[i], i))
break;
}
-
+
fileRead.close();
return true;
}
+bool
+Projections::copyViewData (const std::string& filename, std::ostream& os, int startView, int endView)
+{
+ return copyViewData (filename.c_str(), os, startView, endView);
+}
+
+bool
+Projections::copyViewData (const char* const filename, std::ostream& os, int startView, int endView)
+{
+ frnetorderstream is (filename, ios::in | ios::binary);
+ kuint16 sizeHeader, signature;
+ kuint32 _nView, _nDet;
+
+ is.readInt16 (sizeHeader);
+ is.readInt16 (signature);
+ is.readInt32 (_nView);
+ is.readInt32 (_nDet);
+ int nView = _nView;
+ int nDet = _nDet;
+
+ if (signature != m_signature) {
+ sys_error (ERR_FATAL, "Illegal signature in projection file %s", filename);
+ return false;
+ }
+
+ if (startView < 0)
+ startView = 0;
+ if (startView > nView - 1)
+ startView = nView;
+ if (endView < 0 || endView > nView - 1)
+ endView = nView - 1;
+
+ if (startView > endView) { // swap if start > end
+ int tempView = endView;
+ endView = startView;
+ startView = tempView;
+ }
+
+ int sizeView = 8 /* view_angle */ + 4 /* nDet */ + (4 * nDet);
+ unsigned char* pViewData = new unsigned char [sizeView];
+
+ for (int i = startView; i <= endView; i++) {
+ is.seekg (sizeHeader + i * sizeView);
+ is.read (reinterpret_cast<char*>(pViewData), sizeView);
+ os.write (reinterpret_cast<char*>(pViewData), sizeView);
+ if (is.fail() || os.fail())
+ break;
+ }
+
+ delete pViewData;
+ if (is.fail())
+ sys_error (ERR_FATAL, "Error reading projection file");
+ if (os.fail())
+ sys_error (ERR_FATAL, "Error writing projection file");
+
+ return (! (is.fail() | os.fail()));
+}
+
+bool
+Projections::copyHeader (const std::string& filename, std::ostream& os)
+{
+ return copyHeader (filename.c_str(), os);
+}
+
bool
-Projections::write (const string& filename)
+Projections::copyHeader (const char* const filename, std::ostream& os)
+{
+ frnetorderstream is (filename, std::ios::in | std::ios::binary);
+ kuint16 sizeHeader, signature;
+ is.readInt16 (sizeHeader);
+ is.readInt16 (signature);
+ is.seekg (0);
+ if (signature != m_signature) {
+ sys_error (ERR_FATAL, "Illegal signature in projection file %s", filename);
+ return false;
+ }
+
+ unsigned char* pHdrData = new unsigned char [sizeHeader];
+ is.read (reinterpret_cast<char*>(pHdrData), sizeHeader);
+ if (is.fail()) {
+ sys_error (ERR_FATAL, "Error reading header");
+ return false;
+ }
+
+ os.write (reinterpret_cast<char*>(pHdrData), sizeHeader);
+ if (os.fail()) {
+ sys_error (ERR_FATAL, "Error writing header");
+ return false;
+ }
+
+ return true;
+}
+
+bool
+Projections::write (const std::string& filename)
{
return write (filename.c_str());
}
bool
Projections::write (const char* filename)
{
- frnetorderstream fs (filename, ios::out | ios::binary | ios::trunc | ios::ate);
+ frnetorderstream fs (filename, std::ios::out | std::ios::binary | std::ios::trunc | std::ios::ate);
m_filename = filename;
if (! fs) {
sys_error (ERR_SEVERE, "Error opening file %s for output [projections_create]", filename);
return false;
}
-
-#ifdef HAVE_TIME
- time_t t = time(NULL);
- tm* lt = localtime(&t);
- m_year = lt->tm_year;
- m_month = lt->tm_mon;
- m_day = lt->tm_mday;
- m_hour = lt->tm_hour;
- m_minute = lt->tm_min;
- m_second = lt->tm_sec;
-#endif
-
+
if (! headerWrite (fs))
- return false;
-
+ return false;
+
if (m_projData != NULL) {
for (int i = 0; i < m_nView; i++) {
if (! detarrayWrite (fs, *m_projData[i], i))
- break;
+ break;
}
}
if (! fs)
return false;
-
- fs.close();
-
+
+ fs.close();
+
return true;
}
/* NAME
- * detarrayRead Read a Detector Array structure from the disk
- *
- * SYNOPSIS
- * detarrayRead (proj, darray, view_num)
- * DETARRAY *darray Detector array storage location to be filled
- * int view_num View number to read
- */
+* detarrayRead Read a Detector Array structure from the disk
+*
+* SYNOPSIS
+* detarrayRead (proj, darray, view_num)
+* DETARRAY *darray Detector array storage location to be filled
+* int view_num View number to read
+*/
bool
Projections::detarrayRead (fnetorderstream& fs, DetectorArray& darray, const int iview)
DetectorValue* detval_ptr = darray.detValues();
kfloat64 view_angle;
kuint32 nDet;
-
+
fs.seekg (start_data);
-
+
fs.readFloat64 (view_angle);
fs.readInt32 (nDet);
darray.setViewAngle (view_angle);
// darray.setNDet ( nDet);
for (unsigned int i = 0; i < nDet; i++) {
- kfloat32 detval;
- fs.readFloat32 (detval);
- detval_ptr[i] = detval;
+ kfloat32 detval;
+ fs.readFloat32 (detval);
+ detval_ptr[i] = detval;
}
if (! fs)
return false;
-
+
return true;
}
/* NAME
- * detarrayWrite Write detector array data to the disk
- *
- * SYNOPSIS
- * detarrayWrite (darray, view_num)
- * DETARRAY *darray Detector array data to be written
- * int view_num View number to write
- *
- * DESCRIPTION
- * This routine writes the detarray data from the disk sequentially to
- * the file that was opened with open_projections(). Data is written in
- * binary format.
- */
+* detarrayWrite Write detector array data to the disk
+*
+* SYNOPSIS
+* detarrayWrite (darray, view_num)
+* DETARRAY *darray Detector array data to be written
+* int view_num View number to write
+*
+* DESCRIPTION
+* This routine writes the detarray data from the disk sequentially to
+* the file that was opened with open_projections(). Data is written in
+* binary format.
+*/
bool
Projections::detarrayWrite (fnetorderstream& fs, const DetectorArray& darray, const int iview)
sys_error (ERR_SEVERE, "Error seeking detectory array [detarrayWrite]");
return false;
}
-
+
fs.writeFloat64 (view_angle);
fs.writeInt32 (nDet);
-
+
for (unsigned int i = 0; i < nDet; i++) {
kfloat32 detval = detval_ptr[i];
fs.writeFloat32 (detval);
}
-
+
if (! fs)
return (false);
-
+
return true;
}
/* NAME
- * printProjectionData Print projections data
- *
- * SYNOPSIS
- * printProjectionData ()
- */
+* printProjectionData Print projections data
+*
+* SYNOPSIS
+* printProjectionData ()
+*/
void
-Projections::printProjectionData (void)
+Projections::printProjectionData ()
+{
+ printProjectionData (0, nView() - 1);
+}
+
+void
+Projections::printProjectionData (int startView, int endView)
{
printf("Projections Data\n\n");
printf("Description: %s\n", m_remark.c_str());
printf("rotStart = %8.4f rotInc = %8.4f\n", m_rotStart, m_rotInc);
printf("detStart = %8.4f detInc = %8.4f\n", m_detStart, m_detInc);
if (m_projData != NULL) {
- for (int ir = 0; ir < m_nView; ir++) {
- printf("View %d: angle %f\n", ir, m_projData[ir]->viewAngle());
- DetectorValue* detval = m_projData[ir]->detValues();
- for (int id = 0; id < m_projData[ir]->nDet(); id++)
- printf("%8.4f ", detval[id]);
- printf("\n");
- }
+ if (startView < 0)
+ startView = 0;
+ if (startView > m_nView - 1)
+ startView = m_nView - 1;
+ if (endView > m_nView - 1)
+ endView = m_nView - 1;
+ for (int ir = startView; ir <= endView - 1; ir++) {
+ printf("View %d: angle %f\n", ir, m_projData[ir]->viewAngle());
+ DetectorValue* detval = m_projData[ir]->detValues();
+ for (int id = 0; id < m_projData[ir]->nDet(); id++)
+ printf("%8.4f ", detval[id]);
+ printf("\n");
+ }
}
}
void
-Projections::printScanInfo (ostringstream& os) const
+Projections::printScanInfo (std::ostringstream& os) const
{
os << "Number of detectors: " << m_nDet << "\n";
os << " Number of views: " << m_nView<< "\n";
}
+bool
+Projections::convertPolar (ImageFile& rIF, int iInterpolationID)
+{
+ unsigned int nx = rIF.nx();
+ unsigned int ny = rIF.ny();
+ ImageFileArray v = rIF.getArray();
+ ImageFileArray vImag = rIF.getImaginaryArray();
+
+ if (! v || nx == 0 || ny == 0)
+ return false;
+
+ Array2d<double> adView (nx, ny);
+ Array2d<double> adDet (nx, ny);
+ double** ppdView = adView.getArray();
+ double** ppdDet = adDet.getArray();
+
+ calcArrayPolarCoordinates (nx, ny, ppdView, ppdDet);
+
+ std::complex<double>** ppcDetValue = new std::complex<double>* [m_nView];
+ for (unsigned int iView = 0; iView < m_nView; iView++) {
+ ppcDetValue[iView] = new std::complex<double> [m_nDet];
+ for (unsigned int iDet = 0; iDet < m_nDet; iDet++)
+ ppcDetValue[iView][iDet] = std::complex<double>(getDetectorArray (iView).detValues()[iDet], 0);
+ }
+
+ interpolatePolar (v, vImag, nx, ny, ppcDetValue, ppdView, ppdDet, m_nView, m_nDet, iInterpolationID);
+
+ for (iView = 0; iView < m_nView; iView++)
+ delete [] ppcDetValue[iView];
+ delete [] ppcDetValue;
+
+ return true;
+}
+
+
+bool
+Projections::convertFFTPolar (ImageFile& rIF, int iInterpolationID, int iZeropad)
+{
+ 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;
+
+ Array2d<double> adView (nx, ny);
+ Array2d<double> adDet (nx, ny);
+ double** ppdView = adView.getArray();
+ double** ppdDet = adDet.getArray();
+
+ std::complex<double>** ppcDetValue = new std::complex<double>* [m_nView];
+ unsigned int iView;
+ double* pdDet = new double [m_nDet];
+ fftw_complex* pcIn = new fftw_complex [m_nDet];
+ fftw_plan plan = fftw_create_plan (m_nDet, FFTW_FORWARD, FFTW_IN_PLACE);
+
+ for (iView = 0; iView < m_nView; iView++) {
+ ppcDetValue[iView] = new std::complex<double> [m_nDet];
+ unsigned int iDet;
+ for (iDet = 0; iDet < m_nDet; iDet++) {
+ pcIn[iDet].re = getDetectorArray(iView).detValues()[iDet];
+ pcIn[iDet].im = 0;
+ }
+ fftw_one (plan, pcIn, NULL);
+ for (iDet = 0; iDet < m_nDet; iDet++)
+ ppcDetValue[iView][iDet] = std::complex<double> (pcIn[iDet].re, pcIn[iDet].im);
+ Fourier::shuffleFourierToNaturalOrder (ppcDetValue[iView], m_nDet);
+ }
+
+ fftw_destroy_plan (plan);
+ delete [] pcIn;
+
+ calcArrayPolarCoordinates (nx, ny, ppdView, ppdDet);
+
+ interpolatePolar (v, vImag, nx, ny, ppcDetValue, ppdView, ppdDet, m_nView, m_nDet, iInterpolationID);
+
+ for (iView = 0; iView < m_nView; iView++)
+ delete [] ppcDetValue[iView];
+ delete [] ppcDetValue;
+
+ return true;
+}
+
+void
+Projections::calcArrayPolarCoordinates (unsigned int nx, unsigned int ny, double** ppdView, double** ppdDet)
+{
+ double xMin = -m_phmLen / 2;
+ double xMax = xMin + m_phmLen;
+ double yMin = -m_phmLen / 2;
+ double yMax = yMin + m_phmLen;
+
+ double xInc = (xMax - xMin) / nx; // size of cells
+ double yInc = (yMax - yMin) / ny;
+
+ int iDetCenter = (m_nDet - 1) / 2; // index refering to L=0 projection
+
+ if (m_geometry != Scanner::GEOMETRY_PARALLEL) {
+ sys_error (ERR_WARNING, "convertPolar supports Parallel only");
+ }
+
+ 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 >= PI) {
+ phi -= PI;
+ } else if (phi < 0) {
+ phi += PI;
+ } else
+ r = -r;
+
+ ppdView[ix][iy] = (phi - m_rotStart) / m_rotInc;
+ ppdDet[ix][iy] = (r / m_detInc) + 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, int iInterpolationID)
+{
+ for (unsigned int ix = 0; ix < ny; ix++) {
+ for (unsigned int iy = 0; iy < ny; iy++) {
+ if (iInterpolationID == POLAR_INTERP_NEAREST) {
+ int iView = nearest<int> (ppdView[ix][iy]);
+ int iDet = nearest<int> (ppdDet[ix][iy]);
+ if (iView == nView) {
+ iView = 0;
+ // iDet = m_nDet - iDet;
+ }
+ if (iDet >= 0 && iDet < nDet && iView >= 0 && iView < nView) {
+ v[ix][iy] = ppcDetValue[iView][iDet].real();
+ if (vImag)
+ vImag[ix][iy] = ppcDetValue[iView][iDet].imag();
+ } else {
+ sys_error (ERR_SEVERE, "Can't find projection data for ix=%d,iy=%d with radView=%f and radDet=%f",
+ ix, iy, ppdView[ix][iy], ppdDet[ix][iy]);
+ v[ix][iy] = 0;
+ }
+ } else if (iInterpolationID == POLAR_INTERP_BILINEAR) {
+ int iFloorView = ppdView[ix][iy];
+ double dFracView = ppdView[ix][iy] - iFloorView;
+ int iFloorDet = ppdDet[ix][iy];
+ double dFracDet = ppdDet[ix][iy] - iFloorDet;
+
+ if (iFloorDet >= 0 && iFloorView >= 0) {
+ std::complex<double> v1 = ppcDetValue[iFloorView][iFloorDet];
+ std::complex<double> v2, v3, v4;
+ if (iFloorView < nView - 1)
+ v2 = ppcDetValue[iFloorView + 1][iFloorDet];
+ else
+ v2 = ppcDetValue[0][iFloorDet];
+ if (iFloorDet < nDet - 1)
+ v4 = ppcDetValue[iFloorView][iFloorDet+1];
+ else
+ v4 = v1;
+ if (iFloorView < nView - 1 && iFloorDet < nDet - 1)
+ v3 = ppcDetValue [iFloorView+1][iFloorDet+1];
+ else if (iFloorView < nView - 1)
+ v3 = v2;
+ else
+ v3 = ppcDetValue[0][iFloorDet+1];
+ std::complex<double> vInterp = (1 - dFracView) * (1 - dFracDet) * v1 +
+ dFracView * (1 - dFracDet) * v2 + dFracView * dFracDet * v3 +
+ dFracDet * (1 - dFracView) * v4;
+ v[ix][iy] = vInterp.real();
+ if (vImag)
+ vImag[ix][iy] = vInterp.imag();
+ } else {
+ sys_error (ERR_SEVERE, "Can't find projection data for ix=%d,iy=%d with radView=%f and radDet=%f",
+ ix, iy, ppdView[ix][iy], ppdDet[ix][iy]);
+ v[ix][iy] = 0;
+ if (vImag)
+ vImag[ix][iy] = 0;
+ }
+ } else if (iInterpolationID == POLAR_INTERP_BICUBIC) {
+ v[ix][iy] =0;
+ if (vImag)
+ vImag[ix][iy] = 0;
+ }
+ }
+ }
+}
+
projects / ctsim.git / blobdiff