X-Git-Url: http://git.kpe.io/?p=ctsim.git;a=blobdiff_plain;f=libctsim%2Fprojections.cpp;h=7d3e814967394d885dd3b494ea0c626f351157df;hp=54f8f7d66cce47b12657f9509ac39ad667718ab9;hb=08a5cd04c3994d5ea24713b9b000791bd2e406fe;hpb=44ba9ce559d2d52cbd7bbea6bcd76242840fd3eb diff --git a/libctsim/projections.cpp b/libctsim/projections.cpp index 54f8f7d..7d3e814 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 1.3 2000/06/20 17:54:51 kevin Exp $ +** $Id: projections.cpp,v 1.18 2000/07/29 19:50:08 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 @@ -132,18 +132,26 @@ 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; @@ -155,7 +163,8 @@ Projections::headerWrite (fnetorderstream& fs) if (! fs) return false; - fs.writeInt32 (_hsize); + fs.writeInt16 (_hsize); + fs.writeInt16 (_signature); fs.writeInt32 (_nView); fs.writeInt32 (_nDet); fs.writeInt32 (_geom); @@ -165,13 +174,19 @@ Projections::headerWrite (fnetorderstream& fs) fs.writeFloat64 (_detStart); fs.writeFloat64 (_detInc); fs.writeFloat64 (_phmLen); - fs.writeInt32 (_remarksize); + 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 +200,16 @@ 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; 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); @@ -212,17 +219,24 @@ 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.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) { @@ -248,6 +262,17 @@ Projections::headerRead (fnetorderstream& fs) m_detStart = _detStart; m_detInc = _detInc; m_phmLen = _phmLen; + 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; } @@ -256,6 +281,7 @@ bool Projections::read (const char* filename) { frnetorderstream fileRead (filename, ios::in | ios::binary); + m_filename = filename; if (! fileRead) return false; @@ -280,11 +306,21 @@ 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; @@ -329,7 +365,7 @@ 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 +411,7 @@ 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); } @@ -427,3 +463,153 @@ Projections::printScanInfo (void) const } + +/* 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) 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; + 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); + + const DetectorArray& darray = getDetectorArray (iview); + const DetectorValue* detval = darray.detValues(); + + filter.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_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) { + 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; +} +