X-Git-Url: http://git.kpe.io/?p=ctsim.git;a=blobdiff_plain;f=libctsim%2Fprojections.cpp;h=49aaa9942b078ea417817adb45789a0de5df26bc;hp=69c4d0807a5065d3136e015ad65740ed5465db79;hb=9703ace3c451ce079967284bf191783736dbc77f;hpb=3fba6928127cd65870bdcd96c8114ad5894247ae diff --git a/libctsim/projections.cpp b/libctsim/projections.cpp index 69c4d08..49aaa99 100644 --- a/libctsim/projections.cpp +++ b/libctsim/projections.cpp @@ -8,7 +8,7 @@ ** This is part of the CTSim program ** Copyright (C) 1983-2000 Kevin Rosenberg ** -** $Id: projections.cpp,v 1.14 2000/07/13 07:03:21 kevin Exp $ +** $Id: projections.cpp,v 1.29 2000/12/16 02:31:00 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 @@ -25,7 +25,8 @@ ******************************************************************************/ #include "ct.h" - + +const kuint16 Projections::m_signature = ('P'*256 + 'J'); /* NAME * Projections Constructor for projections matrix storage @@ -66,6 +67,7 @@ Projections::~Projections (void) void Projections::init (const int nView, const int nDet) { + m_label.setLabelType (Array2dFileLabel::L_HISTORY); m_nView = nView; m_nDet = nDet; newProjData (); @@ -74,15 +76,24 @@ Projections::init (const int nView, const int nDet) 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_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 @@ -158,7 +169,9 @@ Projections::headerWrite (fnetorderstream& fs) 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; @@ -174,6 +187,8 @@ Projections::headerWrite (fnetorderstream& fs) fs.writeFloat64 (_detStart); fs.writeFloat64 (_detInc); fs.writeFloat64 (_phmLen); + fs.writeFloat64 (_focalLength); + fs.writeFloat64 (_fieldOfView); fs.writeInt16 (_year); fs.writeInt16 (_month); fs.writeInt16 (_day); @@ -202,7 +217,7 @@ 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, _phmLen; + kfloat64 _calcTime, _rotStart, _rotInc, _detStart, _detInc, _phmLen, _focalLength, _fieldOfView; fs.seekg(0); if (! fs) @@ -219,6 +234,8 @@ Projections::headerRead (fnetorderstream& fs) fs.readFloat64 (_detStart); fs.readFloat64 (_detInc); fs.readFloat64 (_phmLen); + fs.readFloat64 (_focalLength); + fs.readFloat64 (_fieldOfView); fs.readInt16 (_year); fs.readInt16 (_month); fs.readInt16 (_day); @@ -237,14 +254,15 @@ Projections::headerRead (fnetorderstream& fs) return false; } - char remarkStorage[_remarksize+1]; - fs.read (remarkStorage, _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; + pszRemarkStorage[_remarksize] = 0; + m_remark = pszRemarkStorage; + delete pszRemarkStorage; off_t _hsizeread = fs.tellg(); if (!fs || _hsizeread != _hsize) { @@ -262,6 +280,8 @@ Projections::headerRead (fnetorderstream& 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; @@ -277,6 +297,13 @@ Projections::headerRead (fnetorderstream& fs) return true; } +bool +Projections::read (const string& filename) +{ + return read (filename.c_str()); +} + + bool Projections::read (const char* filename) { @@ -302,6 +329,105 @@ Projections::read (const char* filename) } +bool +Projections::copyViewData (const string& filename, ostream& os, int startView, int endView) +{ + return copyViewData (filename.c_str(), os, startView, endView); +} + +bool +Projections::copyViewData (const char* const filename, 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 (pViewData, sizeView); + os.write (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 string& filename, ostream& os) +{ + return copyHeader (filename.c_str(), os); +} + +bool +Projections::copyHeader (const char* const filename, ostream& os) +{ + frnetorderstream is (filename, ios::in | 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 (pHdrData, sizeHeader); + if (is.fail()) { + sys_error (ERR_FATAL, "Error reading header"); + return false; + } + + os.write (pHdrData, sizeHeader); + if (os.fail()) { + sys_error (ERR_FATAL, "Error writing header"); + return false; + } + + return true; +} + +bool +Projections::write (const string& filename) +{ + return write (filename.c_str()); +} + bool Projections::write (const char* filename) { @@ -312,6 +438,7 @@ Projections::write (const char* filename) return false; } +#ifdef HAVE_TIME time_t t = time(NULL); tm* lt = localtime(&t); m_year = lt->tm_year; @@ -320,6 +447,7 @@ Projections::write (const char* filename) m_hour = lt->tm_hour; m_minute = lt->tm_min; m_second = lt->tm_sec; +#endif if (! headerWrite (fs)) return false; @@ -423,188 +551,60 @@ Projections::detarrayWrite (fnetorderstream& fs, const DetectorArray& darray, co } /* NAME - * prt_projections Print projections data + * printProjectionData Print projections data * * SYNOPSIS - * prt_projections (proj) - * Projections& proj Projection data to be printed + * printProjectionData () */ void -Projections::printProjectionData (void) +Projections::printProjectionData () { - 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); + 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 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++) { - 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 (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* const interpName, int interpFactor, const char* const backprojectName, const int trace) -{ - 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; - SignalFilter filter (filterName, filterMethodName, filterBW, m_detInc, m_nDet, filt_param, "spatial", zeropad, interpFactor); - filter.setTraceLevel(trace); - - if (filter.fail()) { - sys_error (ERR_SEVERE, "%s [Projections::reconstruct]", filter.failMessage().c_str()); - return false; - } - - if (trace) - cout << "Reconstruct: filter="<= TRACE_TEXT) { - 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_TEXT) - printf ("Reconstructing view %d (last = %d)\n", iview, m_nView - 1); - - DetectorArray& darray = getDetectorArray (iview); - DetectorValue* detval = darray.detValues(); - - filter.filterSignal (detval, filteredProj); - -#ifdef HAVE_SGP - if (trace >= TRACE_PLOT) { - ezset ("clear."); - ezset ("xticks major 5."); - ezset ("xlabel "); - ezset ("ylabel "); - ezset ("xlength .5."); - ezset ("box."); - ezset ("grid."); - ezset ("ufinish yes."); - ezplot (detval, plot_xaxis, m_nDet); - ezset ("clear."); - ezset ("xticks major 5."); - ezset ("xlabel "); - ezset ("ylabel "); - ezset ("ustart yes."); - ezset ("xporigin .5."); - ezset ("xlength .5."); - ezset ("box"); - - ezset ("grid"); - gid = ezplot (filteredProj, plot_xaxis, n_filteredProj); - } -#endif //HAVE_SGP - -#ifdef HAVE_BSPLINE_INTERP - if (interp_type == I_BSPLINE) - bspline (m_nDet, zoom_factor, spline_order, filteredProj, filteredProj); - -#ifdef HAVE_SGP - if (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_PLOT) { - char str[256]; - printf ("Do you want to exit with current pic (y/n) -- "); - fgets(str, sizeof(str), stdin); - sgp2_close (sgp2_get_active_win()); - if (tolower(str[0]) == 'y') { - break; - } - } -#endif //HAVE_SGP - } - - return true; -} -