** Date Started: Aug 84
**
** This is part of the CTSim program
-** Copyright (C) 1983-2000 Kevin Rosenberg
+** Copyright (c) 1983-2001 Kevin Rosenberg
**
-** $Id: projections.cpp,v 1.2 2000/06/19 17:58:20 kevin Exp $
+** $Id: projections.cpp,v 1.67 2001/03/18 18:08:25 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"
+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* const Projections::s_aszInterpName[] =
+{
+ {"nearest"},
+ {"bilinear"},
+// {"bicubic"},
+};
+
+const char* const 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_label.setLabelType (Array2dFileLabel::L_HISTORY);
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
Projections::initFromScanner (const Scanner& scanner)
{
+ 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_detStart = scanner.detStart();
+ m_geometry = scanner.geometry();
+ m_dFocalLength = scanner.focalLength();
+ m_dSourceDetectorLength = scanner.sourceDetectorLength();
+ m_dViewDiameter = scanner.viewDiameter();
m_rotStart = 0;
- m_detStart = -scanner.radius() + (scanner.detInc() / 2);
- m_phmLen = scanner.phmLen();
+ m_dFanBeamAngle = scanner.fanBeamAngle();
}
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_write_header Write data header for projections file
- *
- */
+* Projections::headerWwrite Write data header for projections file
+*
+*/
bool
-Projections::headerWrite (void)
+Projections::headerWrite (fnetorderstream& fs)
{
- kuint32 _hsize = m_headerSize;
+ kuint16 _hsize = m_headerSize;
+ kuint16 _signature = m_signature;
kuint32 _nView = m_nView;
kuint32 _nDet = m_nDet;
kuint32 _geom = m_geometry;
- kuint32 _remarksize = m_remark.length();
+ kuint16 _remarksize = m_remark.length();
+ kuint16 _year = m_year;
+ kuint16 _month = m_month;
+ kuint16 _day = m_day;
+ 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 _detStart = m_detStart;
kfloat64 _detInc = m_detInc;
- kfloat64 _phmLen = m_phmLen;
-
- if (m_fd < 0) {
- sys_error (ERR_SEVERE, "m_fd < 0 [projections_write_header]");
- return false;
- }
-
- if (lseek (m_fd, (off_t) 0, SEEK_SET) != (off_t) 0) {
- sys_error (ERR_WARNING, "Error seeking to beginning of fiel [projections_write_header]");
- return false;
- }
+ kfloat64 _viewDiameter = m_dViewDiameter;
+ kfloat64 _focalLength = m_dFocalLength;
+ kfloat64 _sourceDetectorLength = m_dSourceDetectorLength;
+ kfloat64 _fanBeamAngle = m_dFanBeamAngle;
- if (! write_nint32 (&_hsize, m_fd) ||
- ! write_nint32 (&_nView, m_fd) ||
- ! write_nint32 (&_nDet, m_fd) ||
- ! write_nint32 (&_geom, m_fd) ||
- ! write_nfloat64 (&_calcTime, m_fd) ||
- ! write_nfloat64 (&_rotStart, m_fd) ||
- ! write_nfloat64 (&_rotInc, m_fd) ||
- ! write_nfloat64 (&_detStart, m_fd) ||
- ! write_nfloat64 (&_detInc, m_fd) ||
- ! write_nfloat64 (&_phmLen, m_fd) ||
- ! write_nint32 (&_remarksize, m_fd) ||
- (::write (m_fd, m_remark.c_str(), _remarksize) != _remarksize)) {
- sys_error (ERR_SEVERE, "Error writing header information [projections_write_header] %ld", _remarksize);
+ fs.seekp(0);
+ if (! fs)
return false;
- }
- m_headerSize = _hsize = lseek(m_fd, (off_t) 0, SEEK_CUR);
- if ((lseek(m_fd, 0, SEEK_SET) != 0) || ! write_nint32 (&_hsize, m_fd)) {
- sys_error (ERR_SEVERE, "Error writing header information [projections_write_header]");
+
+ fs.writeInt16 (_hsize);
+ fs.writeInt16 (_signature);
+ fs.writeInt32 (_nView);
+ fs.writeInt32 (_nDet);
+ fs.writeInt32 (_geom);
+ fs.writeFloat64 (_calcTime);
+ fs.writeFloat64 (_rotStart);
+ fs.writeFloat64 (_rotInc);
+ fs.writeFloat64 (_detStart);
+ fs.writeFloat64 (_detInc);
+ fs.writeFloat64 (_viewDiameter);
+ fs.writeFloat64 (_focalLength);
+ fs.writeFloat64 (_sourceDetectorLength);
+ fs.writeFloat64 (_fanBeamAngle);
+ fs.writeInt16 (_year);
+ fs.writeInt16 (_month);
+ fs.writeInt16 (_day);
+ fs.writeInt16 (_hour);
+ fs.writeInt16 (_minute);
+ 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 true;
}
-
/* NAME
- * projections_read_header Read data header for projections file
- *
- */
-
+* projections_read_header Read data header for projections file
+*
+*/
bool
-Projections::headerRead (void)
-{
- kuint32 _hsize;
- kuint32 _nView;
- kuint32 _nDet;
- kuint32 _geom;
- kuint32 _remarksize = 0;
- kfloat64 _calcTime;
- kfloat64 _rotStart;
- kfloat64 _rotInc;
- kfloat64 _detStart;
- kfloat64 _detInc;
- kfloat64 _phmLen;
-
- if (m_fd < 0) {
- sys_error (ERR_SEVERE, "m_fd < 0 [projections_read_header]");
+Projections::headerRead (fnetorderstream& fs)
+{
+ kuint16 _hsize, _signature, _year, _month, _day, _hour, _minute, _second, _remarksize = 0;
+ kuint32 _nView, _nDet, _geom;
+ kfloat64 _calcTime, _rotStart, _rotInc, _detStart, _detInc, _focalLength, _sourceDetectorLength, _viewDiameter, _fanBeamAngle;
+
+ fs.seekg(0);
+ if (! fs)
return false;
- }
-
- if (lseek (m_fd, (off_t) 0, SEEK_SET) != (off_t) 0) {
- sys_error (ERR_WARNING, "Error seeking to beginning of field [projections_read_header]");
+
+ fs.readInt16 (_hsize);
+ fs.readInt16 (_signature);
+ fs.readInt32 (_nView);
+ fs.readInt32 (_nDet);
+ fs.readInt32 (_geom);
+ fs.readFloat64 (_calcTime);
+ fs.readFloat64 (_rotStart);
+ fs.readFloat64 (_rotInc);
+ fs.readFloat64 (_detStart);
+ fs.readFloat64 (_detInc);
+ fs.readFloat64 (_viewDiameter);
+ fs.readFloat64 (_focalLength);
+ fs.readFloat64 (_sourceDetectorLength);
+ fs.readFloat64 (_fanBeamAngle);
+ fs.readInt16 (_year);
+ fs.readInt16 (_month);
+ fs.readInt16 (_day);
+ fs.readInt16 (_hour);
+ 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;
}
-
- off_t testPos;
- if (! read_nint32 (&_hsize, m_fd)) {
- sys_error (ERR_SEVERE, "Error reading header size , _hsize=%d [projections_read_header]", _hsize);
+
+ if (_signature != m_signature) {
+ sys_error (ERR_SEVERE, "File %s does not have a valid projection file signature", m_filename.c_str());
return false;
}
- if ( ! read_nint32 (&_nView, m_fd) ||
- ! read_nint32 (&_nDet, m_fd) ||
- ! read_nint32 (&_geom, m_fd) ||
- ! read_nfloat64 (&_calcTime, m_fd) ||
- ! read_nfloat64 (&_rotStart, m_fd) ||
- ! read_nfloat64 (&_rotInc, m_fd) ||
- ! read_nfloat64 (&_detStart, m_fd) ||
- ! read_nfloat64 (&_detInc, m_fd) ||
- ! read_nfloat64 (&_phmLen, m_fd) ||
- ! read_nint32 (&_remarksize, m_fd))
- {
- sys_error (ERR_SEVERE, "Error reading header information , _remarksize=%d [projections_read_header]", _remarksize);
- return false;
- }
-
- char remarkStorage[_remarksize+1];
- if (::read (m_fd, &remarkStorage, _remarksize) != _remarksize) {
+
+ char* pszRemarkStorage = new char [_remarksize+1];
+ fs.read (pszRemarkStorage, _remarksize);
+ if (! fs) {
sys_error (ERR_SEVERE, "Error reading remark, _remarksize = %d", _remarksize);
return false;
}
- remarkStorage[_remarksize] = 0;
- m_remark = remarkStorage;
-
- off_t _hsizeread = lseek(m_fd, 0, SEEK_CUR);
- if (_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;
+ pszRemarkStorage[_remarksize] = 0;
+ m_remark = pszRemarkStorage;
+ 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;
}
m_headerSize = _hsize;
m_rotInc = _rotInc;
m_detStart = _detStart;
m_detInc = _detInc;
- m_phmLen = _phmLen;
-
+ m_dFocalLength = _focalLength;
+ m_dSourceDetectorLength = _sourceDetectorLength;
+ m_dViewDiameter = _viewDiameter;
+ m_dFanBeamAngle = _fanBeamAngle;
+ m_year = _year;
+ m_month = _month;
+ m_day = _day;
+ 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 std::string& filename)
+{
+ return read (filename.c_str());
+}
+
bool
Projections::read (const char* filename)
{
- if ((m_fd = open(filename, OPEN_RDONLY | O_BINARY)) < 0) {
- sys_error (ERR_SEVERE, "Error opening projections file %s for input [open_projections]", filename);
+ m_filename = filename;
+#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;
+}
+
- if (! headerRead()) {
- sys_error (ERR_SEVERE, "Error reading projections file %s [open_projections]", filename);
+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, std::ios::in | std::ios::binary);
+ kuint16 sizeHeader, signature;
+ kuint32 _nView, _nDet;
+
+ is.seekg (0);
+ if (is.fail()) {
+ sys_error (ERR_SEVERE, "Unable to read projection file %s", filename);
return false;
}
- deleteProjData ();
- newProjData ();
-
- for (int i = 0; i < m_nView; i++) {
- if (! detarrayRead (*m_projData[i], i))
+ 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_SEVERE, "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_SEVERE, "Error reading projection file");
+ if (os.fail())
+ sys_error (ERR_SEVERE, "Error writing projection file");
+
+ return (! (is.fail() | os.fail()));
+}
- close (m_fd);
- m_fd = -1;
+bool
+Projections::copyHeader (const std::string& filename, std::ostream& os)
+{
+ return copyHeader (filename.c_str(), os);
+}
+bool
+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_SEVERE, "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_SEVERE, "Error reading header");
+ return false;
+ }
+
+ os.write (reinterpret_cast<char*>(pHdrData), sizeHeader);
+ if (os.fail()) {
+ sys_error (ERR_SEVERE, "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)
{
- if ((m_fd = open (filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY
-#ifndef _WIN32
- , S_IWRITE | S_IREAD | S_IRGRP | S_IROTH
-#endif
- )) < 0) {
- sys_error (ERR_SEVERE, "Error opening file %s for output [projections_create]", filename);
- return false;
- }
- if (! headerWrite ()) {
- sys_error(ERR_SEVERE, "Error writing to file %s [create_projections]", filename);
- return false;
- }
-
- headerWrite ();
-
+ 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;
+ }
+
+ if (! headerWrite (fs))
+ return false;
+
if (m_projData != NULL) {
for (int i = 0; i < m_nView; i++) {
- if (! detarrayWrite (*m_projData[i], i))
- break;
+ if (! detarrayWrite (fs, *m_projData[i], i))
+ break;
}
}
-
- close (m_fd);
- m_fd = -1;
-
+ if (! fs)
+ return false;
+
+ 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 (DetectorArray& darray, const int iview)
+Projections::detarrayRead (fnetorderstream& fs, DetectorArray& darray, const int iview)
{
const int detval_bytes = darray.nDet() * sizeof(kfloat32);
const int detheader_bytes = sizeof(kfloat64) /* view_angle */ + sizeof(kint32) /* nDet */;
DetectorValue* detval_ptr = darray.detValues();
kfloat64 view_angle;
kuint32 nDet;
-
- if (m_fd < 0) {
- sys_error (ERR_SEVERE, "Tried to read detector array on closed file [detarrayRead]");
- return false;
- }
-
- if (lseek(m_fd, start_data, SEEK_SET) != start_data) {
- sys_error (ERR_SEVERE, "Error seeking detectory array [detarrayRead]");
- return false;
- }
-
- if (! read_nfloat64 (&view_angle, m_fd) ||
- ! read_nint32 (&nDet, m_fd)) {
- sys_error (ERR_SEVERE, "Error reading detector array [detarrayRead]");
- return false;
- }
+
+ fs.seekg (start_data);
+
+ fs.readFloat64 (view_angle);
+ fs.readInt32 (nDet);
darray.setViewAngle (view_angle);
// darray.setNDet ( nDet);
- for (int i = 0; i < nDet; i++) {
- kfloat32 detval;
- if (! read_nfloat32 (&detval, m_fd)) {
- sys_error (ERR_SEVERE, "Error reading detector array [detarrayRead]");
- return false;
- }
- detval_ptr[i] = detval;
+ for (unsigned int i = 0; i < nDet; i++) {
+ 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 (const DetectorArray& darray, const int iview)
+Projections::detarrayWrite (fnetorderstream& fs, const DetectorArray& darray, const int iview)
{
const int detval_bytes = darray.nDet() * sizeof(float);
const int detheader_bytes = sizeof(kfloat64) /* view_angle */ + sizeof(kint32) /* nDet */;
kfloat64 view_angle = darray.viewAngle();
kuint32 nDet = darray.nDet();
- if (m_fd < 0) {
- sys_error (ERR_SEVERE, "Tried to write detector array with no file open [detarrayWrite]");
+ fs.seekp (start_data);
+ if (! fs) {
+ 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;
+}
- if (lseek(m_fd, start_data, SEEK_SET) != start_data) {
- sys_error (ERR_SEVERE, "Error seeking detectory array [detarrayWrite]");
- return false;
+/* NAME
+* printProjectionData Print projections data
+*
+* SYNOPSIS
+* 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("Geometry: %s\n", Scanner::convertGeometryIDToName (m_geometry));
+ printf("nView = %8d nDet = %8d\n", m_nView, m_nDet);
+ printf("focalLength = %8.4f ViewDiameter = %8.4f\n", m_dFocalLength, m_dViewDiameter);
+ printf("fanBeamAngle= %8.4f SourceDetector = %8.4f\n", convertRadiansToDegrees(m_dFanBeamAngle), m_dSourceDetectorLength);
+ 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) {
+ if (startView < 0)
+ startView = 0;
+ if (endView < 0)
+ endView = m_nView - 1;
+ 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");
+ }
}
+}
- if ( ! write_nfloat64 (&view_angle, m_fd)) {
- sys_error (ERR_SEVERE, "Error writing detector array [detarrayWrite]");
- return false;
+void
+Projections::printScanInfo (std::ostringstream& os) const
+{
+ os << "Number of detectors: " << m_nDet << "\n";
+ os << "Number of views: " << m_nView<< "\n";
+ os << "Description: " << m_remark.c_str()<< "\n";
+ os << "Geometry: " << Scanner::convertGeometryIDToName (m_geometry)<< "\n";
+ os << "Focal Length: " << m_dFocalLength<< "\n";
+ os << "Source Detector Length: " << m_dSourceDetectorLength << "\n";
+ os << "View Diameter: " << m_dViewDiameter<< "\n";
+ os << "Fan Beam Angle: " << convertRadiansToDegrees(m_dFanBeamAngle) << "\n";
+ os << "detStart: " << m_detStart<< "\n";
+ os << "detInc: " << m_detInc<< "\n";
+ os << "rotStart: " << m_rotStart<< "\n";
+ os << "rotInc: " << m_rotInc<< "\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;
+
+ Projections* pProj = this;
+ if (m_geometry == Scanner::GEOMETRY_EQUIANGULAR || m_geometry == Scanner::GEOMETRY_EQUILINEAR)
+ pProj = interpolateToParallel();
+
+ Array2d<double> adView (nx, ny);
+ Array2d<double> adDet (nx, ny);
+ double** ppdView = adView.getArray();
+ double** ppdDet = adDet.getArray();
+
+ pProj->calcArrayPolarCoordinates (nx, ny, ppdView, ppdDet, m_nDet, 1.);
+
+ std::complex<double>** ppcDetValue = new std::complex<double>* [m_nView];
+ unsigned int iView;
+ for (iView = 0; iView < m_nView; iView++) {
+ ppcDetValue[iView] = new std::complex<double> [m_nDet];
+ DetectorValue* detval = pProj->getDetectorArray (iView).detValues();
+ for (unsigned int iDet = 0; iDet < m_nDet; iDet++)
+ ppcDetValue[iView][iDet] = std::complex<double>(detval[iDet], 0);
}
- if ( ! write_nint32 (&nDet, m_fd)) {
- sys_error (ERR_SEVERE, "Error writing detector array [detarrayWrite]");
- return false;
+
+ pProj->interpolatePolar (v, vImag, nx, ny, ppcDetValue, ppdView, ppdDet, pProj->m_nView, pProj->m_nDet, pProj->m_nDet, iInterpolationID);
+
+ for (iView = 0; iView < m_nView; iView++)
+ delete [] ppcDetValue[iView];
+ delete [] ppcDetValue;
+
+ if (m_geometry == Scanner::GEOMETRY_EQUIANGULAR || m_geometry == Scanner::GEOMETRY_EQUILINEAR)
+ delete pProj;
+
+ return true;
+}
+
+
+bool
+Projections::convertFFTPolar (ImageFile& rIF, int iInterpolationID, int iZeropad)
+{
+#ifndef HAVE_FFT
+ return false;
+#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;
+
+ if (m_geometry != Scanner::GEOMETRY_PARALLEL) {
+ sys_error (ERR_WARNING, "convertFFTPolar supports Parallel only");
+ return false;
}
- for (int i = 0; i < nDet; i++) {
- kfloat32 detval = detval_ptr[i];
- if ( ! write_nfloat32 (&detval, m_fd)) {
- sys_error (ERR_SEVERE, "Error writing detector array [detarrayWrite]");
- 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];
+
+ int iNumDetWithZeros = ProcessSignal::addZeropadFactor (m_nDet, iZeropad);
+ double dZeropadRatio = iNumDetWithZeros / static_cast<double>(m_nDet);
+
+ double* pdDet = new double [iNumDetWithZeros];
+ fftw_complex* pcIn = new fftw_complex [iNumDetWithZeros];
+ fftw_plan plan = fftw_create_plan (iNumDetWithZeros, FFTW_FORWARD, FFTW_IN_PLACE);
+
+ for (unsigned int iView = 0; iView < m_nView; iView++) {
+ DetectorValue* detval = getDetectorArray(iView).detValues();
+ for (unsigned int iDet = 0; iDet < m_nDet; iDet++) {
+ pcIn[iDet].re = detval[iDet];
+ pcIn[iDet].im = 0;
+ }
+ for (unsigned int iDet2 = m_nDet; iDet2 < iNumDetWithZeros; iDet2++)
+ pcIn[iDet2].re = pcIn[iDet2].im = 0;
+
+ fftw_one (plan, pcIn, NULL);
+ ppcDetValue[iView] = new std::complex<double> [iNumDetWithZeros];
+ for (unsigned int iD = 0; iD < iNumDetWithZeros; iD++)
+ ppcDetValue[iView][iD] = std::complex<double> (pcIn[iD].re, pcIn[iD].im);
+//ppcDetValue[iView][iD] = std::complex<double> (std::abs(std::complex<double>(pcIn[iD].re, pcIn[iD].im)), 0);
+ Fourier::shuffleFourierToNaturalOrder (ppcDetValue[iView], iNumDetWithZeros);
}
+ fftw_destroy_plan (plan);
+ delete [] pcIn;
+
+ calcArrayPolarCoordinates (nx, ny, ppdView, ppdDet, iNumDetWithZeros, dZeropadRatio);
+ interpolatePolar (v, vImag, nx, ny, ppcDetValue, ppdView, ppdDet, m_nView, m_nDet, iNumDetWithZeros,
+ iInterpolationID);
+
+ for (int i = 0; i < m_nView; i++)
+ delete [] ppcDetValue[i];
+ delete [] ppcDetValue;
+
return true;
+#endif
}
-/* NAME
- * prt_projections Print projections data
- *
- * SYNOPSIS
- * prt_projections (proj)
- * Projections& proj Projection data to be printed
- */
+void
+Projections::calcArrayPolarCoordinates (unsigned int nx, unsigned int ny, double** ppdView, double** ppdDet,
+ int iNumDetWithZeros, double dZeropadRatio)
+{
+ double xMin = -phmLen() / 2;
+ double xMax = xMin + phmLen();
+ double yMin = -phmLen() / 2;
+ double yMax = yMin + phmLen();
+ 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 / m_detInc) + iDetCenter;
+ }
+ }
+}
void
-Projections::printProjectionData (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)
{
- printf("Projections Print\n\n");
- printf("Description: %s\n", m_remark.c_str());
- printf("nView = %d nDet = %d\n", m_nView, m_nDet);
- 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++) {
- DetectorValue* detval = m_projData[ir]->detValues();
- for (int id = 0; id < m_projData[ir]->nDet(); id++)
- printf("%8.4f ", detval[id]);
- printf("\n");
+ 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 {
+ 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) {
+ unsigned int iFloorView = static_cast<int>(ppdView[ix][iy]);
+ double dFracView = ppdView[ix][iy] - iFloorView;
+ unsigned int iFloorDet = static_cast<int>(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 < nDetWithZeros - 1)
+ v4 = ppcDetValue[iFloorView][iFloorDet+1];
+ else
+ v4 = v1;
+ if (iFloorView < nView - 1 && iFloorDet < nDetWithZeros - 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;
}
+ }
}
}
-void
-Projections::printScanInfo (void) const
+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
{
- printf ("Number of detectors: %d\n", m_nDet);
- printf (" Number of views: %d\n", m_nView);
- printf (" Remark: %s\n", m_remark.c_str());
- printf (" phmLen: %f\n", m_phmLen);
- printf (" detStart: %f\n", m_detStart);
- printf (" detInc: %f\n", m_detInc);
- printf (" rotStart: %f\n", m_rotStart);
- printf (" rotInc: %f\n", m_rotInc);
+ 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;
+ for (int iV = 0; iV < pProjNew->nView(); iV++, dViewAngle += pProjNew->m_rotInc) {
+ DetectorValue* detValues = pProjNew->getDetectorArray (iV).detValues();
+
+ detValues[iD] = parallel.interpolate (pdThetaValuesForT, pdRaysumsForT, pProjNew->nView(), 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;
+ for (int iD = 0; iD < pProjNew->nDet(); iD++, dDetPos += pProjNew->m_detInc) {
+ detValues[iD] = parallel.interpolate (pdOriginalDetPositions, pdDetValueCopy, pProjNew->nDet(), 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_iNumCoordinates(0), m_iNumView(pProjections->nView()), m_iNumDet(pProjections->nDet()),
+ m_iThetaRange (iThetaRange), m_pCoordinates(NULL)
+{
+ 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;
+ }
+ }
}
+ParallelRaysums::~ParallelRaysums()
+{
+ delete m_pCoordinates;
+}
+
+ParallelRaysums::CoordinateContainer&
+ParallelRaysums::getSortedByTheta()
+{
+ if (m_vecpSortedByTheta.size() == 0) {
+ m_vecpSortedByTheta.resize (m_iNumCoordinates);
+ for (int i = 0; i < m_iNumCoordinates; i++)
+ m_vecpSortedByTheta[i] = m_vecpCoordinates[i];
+ std::sort (m_vecpSortedByTheta.begin(), m_vecpSortedByTheta.end(), ParallelRaysumCoordinate::compareByTheta);
+ }
+
+ return m_vecpSortedByTheta;
+}
+
+ParallelRaysums::CoordinateContainer&
+ParallelRaysums::getSortedByT()
+{
+ if (m_vecpSortedByT.size() == 0) {
+ m_vecpSortedByT.resize (m_iNumCoordinates);
+ for (int i = 0; i < m_iNumCoordinates; i++)
+ m_vecpSortedByT[i] = m_vecpCoordinates[i];
+ std::sort (m_vecpSortedByT.begin(), m_vecpSortedByT.end(), ParallelRaysumCoordinate::compareByT);
+ }
+
+ return m_vecpSortedByT;
+}
+
+
+void
+ParallelRaysums::getLimits (double* dMinT, double* dMaxT, double* dMinTheta, double* dMaxTheta) const
+{
+ if (m_iNumCoordinates <= 0)
+ return;
+
+ *dMinT = *dMaxT = m_vecpCoordinates[0]->m_dT;
+ *dMinTheta = *dMaxTheta = m_vecpCoordinates[0]->m_dTheta;
+
+ for (int i = 0; i < m_iNumCoordinates; i++) {
+ double dT = m_vecpCoordinates[i]->m_dT;
+ double dTheta = m_vecpCoordinates[i]->m_dTheta;
+
+ if (dT < *dMinT)
+ *dMinT = dT;
+ else if (dT > *dMaxT)
+ *dMaxT = dT;
+
+ if (dTheta < *dMinTheta)
+ *dMinTheta = dTheta;
+ else if (dTheta > *dMaxTheta)
+ *dMaxTheta = dTheta;
+ }
+}
+
+void
+ParallelRaysums::getThetaAndRaysumsForT (int iTheta, double* pTheta, double* pRaysum)
+{
+ const CoordinateContainer& coordsT = getSortedByT();
+
+ int iBase = iTheta * m_iNumView;
+ for (int i = 0; i < m_iNumView; i++) {
+ int iPos = iBase + i;
+ pTheta[i] = coordsT[iPos]->m_dTheta;
+ pRaysum[i] = coordsT[iPos]->m_dRaysum;
+ }
+}
+
+void
+ParallelRaysums::getDetPositions (double* pdDetPos)
+{
+ const CoordinateContainer& coordsT = getSortedByT();
+
+ int iPos = 0;
+ for (int i = 0; i < m_iNumDet; i++) {
+ pdDetPos[i] = coordsT[iPos]->m_dT;
+ iPos += m_iNumView;
+ }
+}
+
+// locate by bisection, O(log2(n))
+// iLastFloor is used when sequential calls to interpolate with monotonically increasing dX
+double
+ParallelRaysums::interpolate (double* pdX, double* pdY, int n, double dX, int* iLastFloor)
+{
+ int iLower = -1;
+ int iUpper = n;
+ if (iLastFloor && *iLastFloor >= 0 && pdX[*iLastFloor] < dX)
+ iLower = *iLastFloor;
+
+ while (iUpper - iLower > 1) {
+ int iMiddle = (iUpper + iLower) >> 1;
+ if (dX >= pdX[iMiddle])
+ iLower = iMiddle;
+ else
+ iUpper = iMiddle;
+ }
+ if (dX <= pdX[0])
+ return pdY[0];
+ else if (dX >= pdX[n-1])
+ return pdY[1];
+
+ if (iLower < 0 || iLower >= n) {
+ sys_error (ERR_SEVERE, "Coordinate out of range [locateThetaBase]");
+ return 0;
+ }
+
+ if (iLastFloor)
+ *iLastFloor = iLower;
+ return pdY[iLower] + (pdY[iUpper] - pdY[iLower]) * ((dX - pdX[iLower]) / (pdX[iUpper] - pdX[iLower]));
+}