X-Git-Url: http://git.kpe.io/?p=ctsim.git;a=blobdiff_plain;f=libctsim%2Fprojections.cpp;h=49aaa9942b078ea417817adb45789a0de5df26bc;hp=cd151be0e18013b9936bd0103ecc7822ef832857;hb=9703ace3c451ce079967284bf191783736dbc77f;hpb=08f34bf3ba14d4f436f4d2ef0ee5af1d6eb266ac diff --git a/libctsim/projections.cpp b/libctsim/projections.cpp index cd151be..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 1.5 2000/06/25 17:32:24 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 @@ -132,30 +143,41 @@ Projections::deleteProjData (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); @@ -165,13 +187,21 @@ Projections::headerWrite (fnetorderstream& fs) 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; @@ -185,24 +215,16 @@ Projections::headerWrite (fnetorderstream& fs) 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); @@ -212,25 +234,35 @@ Projections::headerRead (fnetorderstream& fs) 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; } - char remarkStorage[_remarksize+1]; - fs.read (remarkStorage, _remarksize); + 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) { 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) { @@ -248,14 +280,35 @@ 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; + 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; @@ -276,15 +329,126 @@ 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) { 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; } + +#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; @@ -329,7 +493,7 @@ Projections::detarrayRead (fnetorderstream& fs, DetectorArray& darray, const int 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; @@ -375,7 +539,7 @@ Projections::detarrayWrite (fnetorderstream& fs, const DetectorArray& darray, co 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); } @@ -387,189 +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 interpName, int interp_param, const char* const backprojectName, const int trace) -{ - int nview = m_nView; - double det_inc = m_detInc; - double detlen = (m_nDet - 1) * det_inc; - int n_filtered_proj = m_nDet; - double filtered_proj [n_filtered_proj]; // convolved result - -#ifdef HAVE_BSPLINE_INTERP - int spline_order = 0, zoom_factor = 0; - if (interp_type == I_BSPLINE) { - zoom_factor = interp_param; - spline_order = 3; - zoom_factor = 3; - n_filtered_proj = (m_nDet - 1) * (zoom_factor + 1) + 1; - } -#endif - - int n_vec_filter = 2 * m_nDet - 1; - double filterBW = 1. / det_inc; - double filterMin = -detlen; - double filterMax = detlen; - - SignalFilter filter (filterName, filterBW, filterMin, filterMax, n_vec_filter, filt_param, "spatial", 0); - 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, det_inc=%.4f\n", m_nView, m_nDet, m_detStart, m_detInc); - } -#endif //HAVE_SGP - - Backprojector bj (*this, im, backprojectName, interpName); - 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(); - - for (int j = 0; j < m_nDet; j++) - filtered_proj[j] = filter.convolve (detval, det_inc, j, m_nDet); - -#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 (filtered_proj, plot_xaxis, m_nDet); - } -#endif //HAVE_SGP - -#ifdef HAVE_BSPLINE_INTERP - if (interp_type == I_BSPLINE) - bspline (m_nDet, zoom_factor, spline_order, filtered_proj, filtered_proj); - -#ifdef HAVE_SGP - if (trace >= TRACE_PLOT && interp_type == I_BSPLINE) { - bspline (m_nDet, zoom_factor, spline_order, filtered_proj, filtered_proj); - ezplot_1d (filtered_proj, n_filtered_proj); - } -#endif -#endif - - bj.BackprojectView (filtered_proj, 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; -} -