** This is part of the CTSim program
** Copyright (C) 1983-2000 Kevin Rosenberg
**
-** $Id: projections.cpp,v 1.3 2000/06/20 17:54:51 kevin Exp $
+** $Id: projections.cpp,v 1.24 2000/08/31 08:38:58 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
m_phmLen = scanner.phmLen();
m_rotInc = scanner.rotInc();
m_detInc = scanner.detInc();
+ m_geometry = scanner.geometry();
+ m_focalLength = scanner.focalLength();
+ m_fieldOfView = scanner.fieldOfView();
m_rotStart = 0;
- m_detStart = -scanner.radius() + (scanner.detInc() / 2);
- m_phmLen = scanner.phmLen();
+ 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
/* NAME
- * projections_write_header Write data header for projections file
+ * Projections::headerWwrite Write data header for projections file
*
*/
bool
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;
-
+ kfloat64 _fieldOfView = m_fieldOfView;
+ kfloat64 _focalLength = m_focalLength;
+
fs.seekp(0);
if (! fs)
return false;
- fs.writeInt32 (_hsize);
+ fs.writeInt16 (_hsize);
+ fs.writeInt16 (_signature);
fs.writeInt32 (_nView);
fs.writeInt32 (_nDet);
fs.writeInt32 (_geom);
fs.writeFloat64 (_detStart);
fs.writeFloat64 (_detInc);
fs.writeFloat64 (_phmLen);
- fs.writeInt32 (_remarksize);
+ fs.writeFloat64 (_focalLength);
+ fs.writeFloat64 (_fieldOfView);
+ 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.writeInt32 (_hsize);
+ fs.writeInt16 (_hsize);
if (! fs)
return false;
bool
Projections::headerRead (fnetorderstream& fs)
{
- kuint32 _hsize;
- kuint32 _nView;
- kuint32 _nDet;
- kuint32 _geom;
- kuint32 _remarksize = 0;
- kfloat64 _calcTime;
- kfloat64 _rotStart;
- kfloat64 _rotInc;
- kfloat64 _detStart;
- kfloat64 _detInc;
- kfloat64 _phmLen;
+ kuint16 _hsize, _signature, _year, _month, _day, _hour, _minute, _second, _remarksize = 0;
+ kuint32 _nView, _nDet, _geom;
+ kfloat64 _calcTime, _rotStart, _rotInc, _detStart, _detInc, _phmLen, _focalLength, _fieldOfView;
fs.seekg(0);
if (! fs)
return false;
- off_t testPos;
- fs.readInt32 (_hsize);
+ fs.readInt16 (_hsize);
+ fs.readInt16 (_signature);
fs.readInt32 (_nView);
fs.readInt32 (_nDet);
fs.readInt32 (_geom);
fs.readFloat64 (_detStart);
fs.readFloat64 (_detInc);
fs.readFloat64 (_phmLen);
- fs.readInt32 (_remarksize);
- if (_remarksize > 100000) {
- sys_error (ERR_SEVERE, "Insane _remarksize %d [projections::headerRead]", _remarksize);
- return false;
- }
+ fs.readFloat64 (_focalLength);
+ fs.readFloat64 (_fieldOfView);
+ 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;
}
+ 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 remarkStorage[_remarksize+1];
fs.read (remarkStorage, _remarksize);
if (! fs) {
m_detStart = _detStart;
m_detInc = _detInc;
m_phmLen = _phmLen;
+ m_focalLength = _focalLength;
+ m_fieldOfView = _fieldOfView;
+ 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 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)
return false;
}
+bool
+Projections::write (const string& filename)
+{
+ return write (filename.c_str());
+}
+
bool
Projections::write (const char* filename)
{
frnetorderstream fs (filename, ios::out | ios::binary | ios::trunc | ios::ate);
-
+ m_filename = filename;
if (! fs) {
sys_error (ERR_SEVERE, "Error opening file %s for output [projections_create]", filename);
return false;
}
+
+ 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;
+
if (! headerWrite (fs))
return false;
darray.setViewAngle (view_angle);
// darray.setNDet ( nDet);
- for (int i = 0; i < nDet; i++) {
+ for (unsigned int i = 0; i < nDet; i++) {
kfloat32 detval;
fs.readFloat32 (detval);
detval_ptr[i] = detval;
fs.writeFloat64 (view_angle);
fs.writeInt32 (nDet);
- for (int i = 0; i < nDet; i++) {
+ for (unsigned int i = 0; i < nDet; i++) {
kfloat32 detval = detval_ptr[i];
fs.writeFloat32 (detval);
}
void
Projections::printProjectionData (void)
{
- printf("Projections Print\n\n");
+ printf("Projections Data\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);
-
+ printf("Geometry: %s\n", Scanner::convertGeometryIDToName (m_geometry));
+ printf("nView = %8d nDet = %8d\n", m_nView, m_nDet);
+ printf("focalLength = %8.4f fieldOfView = %8.4f\n", m_focalLength, m_fieldOfView);
+ 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]);
}
void
-Projections::printScanInfo (void) const
+Projections::printScanInfo (ostringstream& os) 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);
+ os << "Number of detectors: " << m_nDet << "\n";
+ os << " Number of views: " << m_nView<< "\n";
+ os << " Remark: " << m_remark.c_str()<< "\n";
+ os << " Geometry: " << Scanner::convertGeometryIDToName (m_geometry)<< "\n";
+ os << " Focal Length: " << m_focalLength<< "\n";
+ os << " Field Of View: " << m_fieldOfView<< "\n";
+ os << " phmLen: " << m_phmLen<< "\n";
+ os << " detStart: " << m_detStart<< "\n";
+ os << " detInc: " << m_detInc<< "\n";
+ os << " rotStart: " << m_rotStart<< "\n";
+ os << " rotInc: " << m_rotInc<< "\n";
}
+
+/* NAME
+ * Projections::reconstruct Reconstruct Image from Projections
+ *
+ * SYNOPSIS
+ * im = proj.reconstruct (im, filt_type, filt_param, interp_type)
+ * IMAGE *im Output image
+ * int filt_type Type of convolution filter to use
+ * double filt_param Filter specific parameter
+ * Currently, used only with Hamming filters
+ * int interp_type Type of interpolation method to use
+ *
+ * ALGORITHM
+ *
+ * Calculate one-dimensional filter in spatial domain
+ * Allocate & clear (zero) the 2d output image array
+ * For each projection view
+ * Convolve raysum array with filter
+ * Backproject raysums and add (summate) to image array
+ * end
+ */
+
+bool
+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
+{
+ double detInc = m_detInc;
+ int n_filteredProj = m_nDet * interpFactor;
+ double filteredProj [n_filteredProj]; // filtered projections
+
+#ifdef HAVE_BSPLINE_INTERP
+ int spline_order = 0, zoom_factor = 0;
+ if (interp_type == I_BSPLINE) {
+ zoom_factor = interpFactor;
+ spline_order = 3;
+ zoom_factor = 3;
+ n_filteredProj = (m_nDet - 1) * (zoom_factor + 1) + 1;
+ }
+#endif
+
+ double filterBW = 1. / detInc;
+ ProcessSignal processSignal (filterName, filterMethodName, filterBW, m_detInc, m_nDet, filt_param, "spatial", filterGenerationName, zeropad, interpFactor, trace, m_geometry, m_focalLength);
+
+ if (processSignal.fail()) {
+ sys_error (ERR_SEVERE, "%s [Projections::reconstruct]", processSignal.failMessage().c_str());
+ return false;
+ }
+
+ if (trace)
+ cout << "Reconstruct: filter="<<filterName<< ", interp="<<interpName<<", backproject="<<backprojectName<<endl;
+
+#if HAVE_SGP
+ int nVecFilter = processSignal.getNFilterPoints();
+ double plot_xaxis [nVecFilter]; // array for plotting
+
+ if (trace > Trace::TRACE_CONSOLE && nVecFilter > 0) {
+ int i;
+ double f;
+ double filterInc = processSignal.getFilterIncrement();
+ for (i = 0, f = processSignal.getFilterMin(); i < nVecFilter; i++, f += filterInc)
+ plot_xaxis[i] = f;
+
+ if (processSignal.getFilter()) {
+ SGPDriver sgpDriver ("Filter Function");
+ SGP sgp (sgpDriver);
+ EZPlot ezplot (sgp);
+
+ ezplot.ezset ("title Filter Response");
+ ezplot.addCurve (plot_xaxis, processSignal.getFilter(), nVecFilter);
+ ezplot.plot();
+ cio_put_str ("Press any key to continue");
+ cio_kb_getc ();
+ }
+ }
+ if (trace >= Trace::TRACE_CONSOLE) {
+ printf ("nview=%d, ndet=%d, det_start=%.4f, detInc=%.4f\n", m_nView, m_nDet, m_detStart, m_detInc);
+ }
+#endif //HAVE_SGP
+
+ Backprojector bj (*this, im, backprojectName, interpName, interpFactor);
+ if (bj.fail()) {
+ sys_error (ERR_SEVERE, "%s [Projections::reconstruct]", bj.failMessage().c_str());
+ return false;
+ }
+
+ for (int iview = 0; iview < m_nView; iview++) {
+ if (trace >= Trace::TRACE_CONSOLE)
+ cout <<"Reconstructing view " << iview << "(last = " << m_nView - 1 << ")\n";
+
+ const DetectorArray& darray = getDetectorArray (iview);
+ const DetectorValue* detval = darray.detValues();
+
+ processSignal.filterSignal (detval, filteredProj);
+
+#ifdef HAVE_BSPLINE_INTERP
+ if (interp_type == I_BSPLINE)
+ bspline (m_nDet, zoom_factor, spline_order, filteredProj, filteredProj);
+
+#ifdef HAVE_SGP
+ if (trace >= Trace::TRACE_PLOT && interp_type == I_BSPLINE) {
+ bspline (m_nDet, zoom_factor, spline_order, filteredProj, filteredProj);
+ ezplot_1d (filteredProj, n_filteredProj);
+ }
+#endif
+#endif
+
+ bj.BackprojectView (filteredProj, darray.viewAngle());
+
+#ifdef HAVE_SGP
+ if (trace >= Trace::TRACE_PLOT) {
+ SGPDriver sgpDriverProj ("Projection");
+ SGP sgpProj (sgpDriverProj);
+ EZPlot ezplotProj (sgpProj);
+
+ ezplotProj.ezset ("clear");
+ ezplotProj.ezset ("title Filtered Projection");
+ ezplotProj.ezset ("xticks major 5.");
+ ezplotProj.ezset ("xlabel ");
+ ezplotProj.ezset ("ylabel ");
+ ezplotProj.ezset ("yporigin .5.");
+ ezplotProj.ezset ("ylength .5.");
+ ezplotProj.ezset ("box.");
+ ezplotProj.ezset ("grid.");
+ ezplotProj.addCurve (plot_xaxis, detval, m_nDet);
+ ezplotProj.plot();
+ ezplotProj.ezset ("clear");
+ ezplotProj.ezset ("xticks major 5.");
+ ezplotProj.ezset ("xlabel ");
+ ezplotProj.ezset ("ylabel ");
+ ezplotProj.ezset ("ylength .5.");
+ ezplotProj.ezset ("box");
+ ezplotProj.ezset ("grid");
+ ezplotProj.addCurve (plot_xaxis, filteredProj, n_filteredProj);
+ ezplotProj.plot();
+
+ cout << "Do you want to exit with current pic (y/n)? " << flush;
+ char str[256];
+ fgets(str, sizeof(str), stdin);
+ if (tolower(str[0]) == 'y') {
+ break;
+ }
+ }
+#endif //HAVE_SGP
+ }
+
+ return true;
+}
+
projects / ctsim.git / blobdiff