1 /*****************************************************************************
4 ** Name: projections.cpp Projection data classes
5 ** Programmer: Kevin Rosenberg
6 ** Date Started: Aug 84
8 ** This is part of the CTSim program
9 ** Copyright (C) 1983-2000 Kevin Rosenberg
11 ** $Id: projections.cpp,v 1.24 2000/08/31 08:38:58 kevin Exp $
13 ** This program is free software; you can redistribute it and/or modify
14 ** it under the terms of the GNU General Public License (version 2) as
15 ** published by the Free Software Foundation.
17 ** This program is distributed in the hope that it will be useful,
18 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
19 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 ** GNU General Public License for more details.
22 ** You should have received a copy of the GNU General Public License
23 ** along with this program; if not, write to the Free Software
24 ** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 ******************************************************************************/
31 * Projections Constructor for projections matrix storage
34 * proj = projections_create (filename, nView, nDet)
35 * Projections& proj Allocated projections structure & matrix
36 * int nView Number of rotated view
37 * int nDet Number of detectors
41 Projections::Projections (const Scanner& scanner)
44 initFromScanner (scanner);
48 Projections::Projections (const int nView, const int nDet)
54 Projections::Projections (void)
60 Projections::~Projections (void)
67 Projections::init (const int nView, const int nDet)
75 Projections::initFromScanner (const Scanner& scanner)
78 init (scanner.nView(), scanner.nDet());
80 m_phmLen = scanner.phmLen();
81 m_rotInc = scanner.rotInc();
82 m_detInc = scanner.detInc();
83 m_geometry = scanner.geometry();
84 m_focalLength = scanner.focalLength();
85 m_fieldOfView = scanner.fieldOfView();
87 m_detStart = -(scanner.detLen() / 2);
89 if (m_geometry == Scanner::GEOMETRY_EQUILINEAR) {
91 cout << "Kludge: detInc /= 2 in Projections::initFromScanner" << endl;
97 Projections::setNView (int nView) // used by MPI to reduce # of views
100 init (nView, m_nDet);
107 Projections::newProjData (void)
110 sys_error(ERR_WARNING, "m_projData != NULL [newProjData]");
112 if (m_nView > 0 && m_nDet) {
113 m_projData = new DetectorArray* [m_nView];
115 for (int i = 0; i < m_nView; i++)
116 m_projData[i] = new DetectorArray (m_nDet);
122 * projections_free Free memory allocated to projections
125 * projections_free(proj)
126 * Projections& proj Projectionss to be deallocated
130 Projections::deleteProjData (void)
132 if (m_projData != NULL) {
133 for (int i = 0; i < m_nView; i++)
134 delete m_projData[i];
143 * Projections::headerWwrite Write data header for projections file
148 Projections::headerWrite (fnetorderstream& fs)
150 kuint16 _hsize = m_headerSize;
151 kuint16 _signature = m_signature;
152 kuint32 _nView = m_nView;
153 kuint32 _nDet = m_nDet;
154 kuint32 _geom = m_geometry;
155 kuint16 _remarksize = m_remark.length();
156 kuint16 _year = m_year;
157 kuint16 _month = m_month;
158 kuint16 _day = m_day;
159 kuint16 _hour = m_hour;
160 kuint16 _minute = m_minute;
161 kuint16 _second = m_second;
163 kfloat64 _calcTime = m_calcTime;
164 kfloat64 _rotStart = m_rotStart;
165 kfloat64 _rotInc = m_rotInc;
166 kfloat64 _detStart = m_detStart;
167 kfloat64 _detInc = m_detInc;
168 kfloat64 _phmLen = m_phmLen;
169 kfloat64 _fieldOfView = m_fieldOfView;
170 kfloat64 _focalLength = m_focalLength;
176 fs.writeInt16 (_hsize);
177 fs.writeInt16 (_signature);
178 fs.writeInt32 (_nView);
179 fs.writeInt32 (_nDet);
180 fs.writeInt32 (_geom);
181 fs.writeFloat64 (_calcTime);
182 fs.writeFloat64 (_rotStart);
183 fs.writeFloat64 (_rotInc);
184 fs.writeFloat64 (_detStart);
185 fs.writeFloat64 (_detInc);
186 fs.writeFloat64 (_phmLen);
187 fs.writeFloat64 (_focalLength);
188 fs.writeFloat64 (_fieldOfView);
189 fs.writeInt16 (_year);
190 fs.writeInt16 (_month);
191 fs.writeInt16 (_day);
192 fs.writeInt16 (_hour);
193 fs.writeInt16 (_minute);
194 fs.writeInt16 (_second);
195 fs.writeInt16 (_remarksize);
196 fs.write (m_remark.c_str(), _remarksize);
198 m_headerSize = fs.tellp();
199 _hsize = m_headerSize;
201 fs.writeInt16 (_hsize);
209 * projections_read_header Read data header for projections file
213 Projections::headerRead (fnetorderstream& fs)
215 kuint16 _hsize, _signature, _year, _month, _day, _hour, _minute, _second, _remarksize = 0;
216 kuint32 _nView, _nDet, _geom;
217 kfloat64 _calcTime, _rotStart, _rotInc, _detStart, _detInc, _phmLen, _focalLength, _fieldOfView;
223 fs.readInt16 (_hsize);
224 fs.readInt16 (_signature);
225 fs.readInt32 (_nView);
226 fs.readInt32 (_nDet);
227 fs.readInt32 (_geom);
228 fs.readFloat64 (_calcTime);
229 fs.readFloat64 (_rotStart);
230 fs.readFloat64 (_rotInc);
231 fs.readFloat64 (_detStart);
232 fs.readFloat64 (_detInc);
233 fs.readFloat64 (_phmLen);
234 fs.readFloat64 (_focalLength);
235 fs.readFloat64 (_fieldOfView);
236 fs.readInt16 (_year);
237 fs.readInt16 (_month);
239 fs.readInt16 (_hour);
240 fs.readInt16 (_minute);
241 fs.readInt16 (_second);
242 fs.readInt16 (_remarksize);
245 sys_error (ERR_SEVERE, "Error reading header information , _remarksize=%d [projections_read_header]", _remarksize);
249 if (_signature != m_signature) {
250 sys_error (ERR_SEVERE, "File %s does not have a valid projection file signature", m_filename.c_str());
254 char remarkStorage[_remarksize+1];
255 fs.read (remarkStorage, _remarksize);
257 sys_error (ERR_SEVERE, "Error reading remark, _remarksize = %d", _remarksize);
260 remarkStorage[_remarksize] = 0;
261 m_remark = remarkStorage;
263 off_t _hsizeread = fs.tellg();
264 if (!fs || _hsizeread != _hsize) {
265 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);
269 m_headerSize = _hsize;
273 m_calcTime = _calcTime;
274 m_rotStart = _rotStart;
276 m_detStart = _detStart;
279 m_focalLength = _focalLength;
280 m_fieldOfView = _fieldOfView;
288 m_label.setLabelType (Array2dFileLabel::L_HISTORY);
289 m_label.setLabelString (m_remark);
290 m_label.setCalcTime (m_calcTime);
291 m_label.setDateTime (m_year, m_month, m_day, m_hour, m_minute, m_second);
297 Projections::read (const string& filename)
299 return read (filename.c_str());
304 Projections::read (const char* filename)
306 frnetorderstream fileRead (filename, ios::in | ios::binary);
307 m_filename = filename;
312 if (! headerRead (fileRead))
318 for (int i = 0; i < m_nView; i++) {
319 if (! detarrayRead (fileRead, *m_projData[i], i))
329 Projections::write (const string& filename)
331 return write (filename.c_str());
335 Projections::write (const char* filename)
337 frnetorderstream fs (filename, ios::out | ios::binary | ios::trunc | ios::ate);
338 m_filename = filename;
340 sys_error (ERR_SEVERE, "Error opening file %s for output [projections_create]", filename);
344 time_t t = time(NULL);
345 tm* lt = localtime(&t);
346 m_year = lt->tm_year;
347 m_month = lt->tm_mon;
349 m_hour = lt->tm_hour;
350 m_minute = lt->tm_min;
351 m_second = lt->tm_sec;
353 if (! headerWrite (fs))
356 if (m_projData != NULL) {
357 for (int i = 0; i < m_nView; i++) {
358 if (! detarrayWrite (fs, *m_projData[i], i))
371 * detarrayRead Read a Detector Array structure from the disk
374 * detarrayRead (proj, darray, view_num)
375 * DETARRAY *darray Detector array storage location to be filled
376 * int view_num View number to read
380 Projections::detarrayRead (fnetorderstream& fs, DetectorArray& darray, const int iview)
382 const int detval_bytes = darray.nDet() * sizeof(kfloat32);
383 const int detheader_bytes = sizeof(kfloat64) /* view_angle */ + sizeof(kint32) /* nDet */;
384 const int view_bytes = detheader_bytes + detval_bytes;
385 const off_t start_data = m_headerSize + (iview * view_bytes);
386 DetectorValue* detval_ptr = darray.detValues();
390 fs.seekg (start_data);
392 fs.readFloat64 (view_angle);
394 darray.setViewAngle (view_angle);
395 // darray.setNDet ( nDet);
397 for (unsigned int i = 0; i < nDet; i++) {
399 fs.readFloat32 (detval);
400 detval_ptr[i] = detval;
410 * detarrayWrite Write detector array data to the disk
413 * detarrayWrite (darray, view_num)
414 * DETARRAY *darray Detector array data to be written
415 * int view_num View number to write
418 * This routine writes the detarray data from the disk sequentially to
419 * the file that was opened with open_projections(). Data is written in
424 Projections::detarrayWrite (fnetorderstream& fs, const DetectorArray& darray, const int iview)
426 const int detval_bytes = darray.nDet() * sizeof(float);
427 const int detheader_bytes = sizeof(kfloat64) /* view_angle */ + sizeof(kint32) /* nDet */;
428 const int view_bytes = detheader_bytes + detval_bytes;
429 const off_t start_data = m_headerSize + (iview * view_bytes);
430 const DetectorValue* const detval_ptr = darray.detValues();
431 kfloat64 view_angle = darray.viewAngle();
432 kuint32 nDet = darray.nDet();
434 fs.seekp (start_data);
436 sys_error (ERR_SEVERE, "Error seeking detectory array [detarrayWrite]");
440 fs.writeFloat64 (view_angle);
441 fs.writeInt32 (nDet);
443 for (unsigned int i = 0; i < nDet; i++) {
444 kfloat32 detval = detval_ptr[i];
445 fs.writeFloat32 (detval);
455 * prt_projections Print projections data
458 * prt_projections (proj)
459 * Projections& proj Projection data to be printed
463 Projections::printProjectionData (void)
465 printf("Projections Data\n\n");
466 printf("Description: %s\n", m_remark.c_str());
467 printf("Geometry: %s\n", Scanner::convertGeometryIDToName (m_geometry));
468 printf("nView = %8d nDet = %8d\n", m_nView, m_nDet);
469 printf("focalLength = %8.4f fieldOfView = %8.4f\n", m_focalLength, m_fieldOfView);
470 printf("rotStart = %8.4f rotInc = %8.4f\n", m_rotStart, m_rotInc);
471 printf("detStart = %8.4f detInc = %8.4f\n", m_detStart, m_detInc);
472 if (m_projData != NULL) {
473 for (int ir = 0; ir < m_nView; ir++) {
474 printf("View %d: angle %f\n", ir, m_projData[ir]->viewAngle());
475 DetectorValue* detval = m_projData[ir]->detValues();
476 for (int id = 0; id < m_projData[ir]->nDet(); id++)
477 printf("%8.4f ", detval[id]);
484 Projections::printScanInfo (ostringstream& os) const
486 os << "Number of detectors: " << m_nDet << "\n";
487 os << " Number of views: " << m_nView<< "\n";
488 os << " Remark: " << m_remark.c_str()<< "\n";
489 os << " Geometry: " << Scanner::convertGeometryIDToName (m_geometry)<< "\n";
490 os << " Focal Length: " << m_focalLength<< "\n";
491 os << " Field Of View: " << m_fieldOfView<< "\n";
492 os << " phmLen: " << m_phmLen<< "\n";
493 os << " detStart: " << m_detStart<< "\n";
494 os << " detInc: " << m_detInc<< "\n";
495 os << " rotStart: " << m_rotStart<< "\n";
496 os << " rotInc: " << m_rotInc<< "\n";
502 * Projections::reconstruct Reconstruct Image from Projections
505 * im = proj.reconstruct (im, filt_type, filt_param, interp_type)
506 * IMAGE *im Output image
507 * int filt_type Type of convolution filter to use
508 * double filt_param Filter specific parameter
509 * Currently, used only with Hamming filters
510 * int interp_type Type of interpolation method to use
514 * Calculate one-dimensional filter in spatial domain
515 * Allocate & clear (zero) the 2d output image array
516 * For each projection view
517 * Convolve raysum array with filter
518 * Backproject raysums and add (summate) to image array
523 Projections::reconstruct (ImageFile& im, const char* const filterName, double filt_param, const char* const filterMethodName, const int zeropad, const char* filterGenerationName, const char* const interpName, int interpFactor, const char* const backprojectName, const int trace) const
525 double detInc = m_detInc;
526 int n_filteredProj = m_nDet * interpFactor;
527 double filteredProj [n_filteredProj]; // filtered projections
529 #ifdef HAVE_BSPLINE_INTERP
530 int spline_order = 0, zoom_factor = 0;
531 if (interp_type == I_BSPLINE) {
532 zoom_factor = interpFactor;
535 n_filteredProj = (m_nDet - 1) * (zoom_factor + 1) + 1;
539 double filterBW = 1. / detInc;
540 ProcessSignal processSignal (filterName, filterMethodName, filterBW, m_detInc, m_nDet, filt_param, "spatial", filterGenerationName, zeropad, interpFactor, trace, m_geometry, m_focalLength);
542 if (processSignal.fail()) {
543 sys_error (ERR_SEVERE, "%s [Projections::reconstruct]", processSignal.failMessage().c_str());
548 cout << "Reconstruct: filter="<<filterName<< ", interp="<<interpName<<", backproject="<<backprojectName<<endl;
551 int nVecFilter = processSignal.getNFilterPoints();
552 double plot_xaxis [nVecFilter]; // array for plotting
554 if (trace > Trace::TRACE_CONSOLE && nVecFilter > 0) {
557 double filterInc = processSignal.getFilterIncrement();
558 for (i = 0, f = processSignal.getFilterMin(); i < nVecFilter; i++, f += filterInc)
561 if (processSignal.getFilter()) {
562 SGPDriver sgpDriver ("Filter Function");
566 ezplot.ezset ("title Filter Response");
567 ezplot.addCurve (plot_xaxis, processSignal.getFilter(), nVecFilter);
569 cio_put_str ("Press any key to continue");
573 if (trace >= Trace::TRACE_CONSOLE) {
574 printf ("nview=%d, ndet=%d, det_start=%.4f, detInc=%.4f\n", m_nView, m_nDet, m_detStart, m_detInc);
578 Backprojector bj (*this, im, backprojectName, interpName, interpFactor);
580 sys_error (ERR_SEVERE, "%s [Projections::reconstruct]", bj.failMessage().c_str());
584 for (int iview = 0; iview < m_nView; iview++) {
585 if (trace >= Trace::TRACE_CONSOLE)
586 cout <<"Reconstructing view " << iview << "(last = " << m_nView - 1 << ")\n";
588 const DetectorArray& darray = getDetectorArray (iview);
589 const DetectorValue* detval = darray.detValues();
591 processSignal.filterSignal (detval, filteredProj);
593 #ifdef HAVE_BSPLINE_INTERP
594 if (interp_type == I_BSPLINE)
595 bspline (m_nDet, zoom_factor, spline_order, filteredProj, filteredProj);
598 if (trace >= Trace::TRACE_PLOT && interp_type == I_BSPLINE) {
599 bspline (m_nDet, zoom_factor, spline_order, filteredProj, filteredProj);
600 ezplot_1d (filteredProj, n_filteredProj);
605 bj.BackprojectView (filteredProj, darray.viewAngle());
608 if (trace >= Trace::TRACE_PLOT) {
609 SGPDriver sgpDriverProj ("Projection");
610 SGP sgpProj (sgpDriverProj);
611 EZPlot ezplotProj (sgpProj);
613 ezplotProj.ezset ("clear");
614 ezplotProj.ezset ("title Filtered Projection");
615 ezplotProj.ezset ("xticks major 5.");
616 ezplotProj.ezset ("xlabel ");
617 ezplotProj.ezset ("ylabel ");
618 ezplotProj.ezset ("yporigin .5.");
619 ezplotProj.ezset ("ylength .5.");
620 ezplotProj.ezset ("box.");
621 ezplotProj.ezset ("grid.");
622 ezplotProj.addCurve (plot_xaxis, detval, m_nDet);
624 ezplotProj.ezset ("clear");
625 ezplotProj.ezset ("xticks major 5.");
626 ezplotProj.ezset ("xlabel ");
627 ezplotProj.ezset ("ylabel ");
628 ezplotProj.ezset ("ylength .5.");
629 ezplotProj.ezset ("box");
630 ezplotProj.ezset ("grid");
631 ezplotProj.addCurve (plot_xaxis, filteredProj, n_filteredProj);
634 cout << "Do you want to exit with current pic (y/n)? " << flush;
636 fgets(str, sizeof(str), stdin);
637 if (tolower(str[0]) == 'y') {