/*****************************************************************************
** FILE IDENTIFICATION
**
-** Name: scanner.cpp
+** Name: scanner.cpp
** Purpose: Classes for CT scanner
** Programmer: Kevin Rosenberg
** Date Started: 1984
**
** This is part of the CTSim program
-** Copyright (C) 1983-2000 Kevin Rosenberg
-**
-** $Id: scanner.cpp,v 1.7 2000/07/29 19:50:08 kevin Exp $
+** Copyright (c) 1983-2009 Kevin Rosenberg
**
** 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
const int Scanner::GEOMETRY_INVALID = -1;
const int Scanner::GEOMETRY_PARALLEL = 0;
-const int Scanner::GEOMETRY_EQUILINEAR = 1;
-const int Scanner::GEOMETRY_EQUIANGULAR = 2;
+const int Scanner::GEOMETRY_EQUIANGULAR = 1;
+const int Scanner::GEOMETRY_EQUILINEAR = 2;
+const int Scanner::GEOMETRY_LINOGRAM = 3;
-const char* Scanner::s_aszGeometryName[] =
+const char* const Scanner::s_aszGeometryName[] =
{
- {"parallel"},
- {"equilinear"},
- {"equiangular"},
+ "parallel",
+ "equiangular",
+ "equilinear",
+ "linogram",
};
-const char* Scanner::s_aszGeometryTitle[] =
+const char* const Scanner::s_aszGeometryTitle[] =
{
- {"Parallel"},
- {"Equilinear"},
- {"Equiangular"},
+ "Parallel",
+ "Equiangular",
+ "Equilinear",
+ "Linogram",
};
const int Scanner::s_iGeometryCount = sizeof(s_aszGeometryName) / sizeof(const char*);
// NAME
-// DetectorArray Construct a DetectorArray
+// DetectorArray Construct a DetectorArray
DetectorArray::DetectorArray (const int nDet)
{
// NAME
-// ~DetectorArray Free memory allocated to a detector array
+// ~DetectorArray Free memory allocated to a detector array
DetectorArray::~DetectorArray (void)
{
/* NAME
- * Scanner::Scanner Construct a user specified detector structure
- *
- * SYNOPSIS
- * Scanner (phm, nDet, nView, nSample)
- * Phantom& phm PHANTOM that we are making detector for
- * int geomety Geometry of detector
- * int nDet Number of detector along detector array
- * int nView Number of rotated views
- * int nSample Number of rays per detector
- */
+* Scanner::Scanner Construct a user specified detector structure
+*
+* SYNOPSIS
+* Scanner (phm, nDet, nView, nSample)
+* Phantom& phm PHANTOM that we are making detector for
+* int geomety Geometry of detector
+* int nDet Number of detector along detector array
+* int nView Number of rotated views
+* int nSample Number of rays per detector
+*/
-Scanner::Scanner (const Phantom& phm, const char* const geometryName, int nDet, int nView, int nSample, const double rot_anglen)
+Scanner::Scanner (const Phantom& phm, const char* const geometryName,
+ int nDet, int nView, int offsetView,
+ int nSample, const double rot_anglen,
+ const double dFocalLengthRatio,
+ const double dCenterDetectorRatio,
+ const double dViewRatio, const double dScanRatio)
{
- m_phmLen = phm.maxAxisLength(); // maximal length along an axis
-
m_fail = false;
m_idGeometry = convertGeometryNameToID (geometryName);
if (m_idGeometry == GEOMETRY_INVALID) {
return;
}
- if (nView < 1)
- nView = 1;
+ if (nView < 1 || nDet < 1) {
+ m_fail = true;
+ m_failMessage = "nView & nDet must be greater than 0";
+ return;
+ }
if (nSample < 1)
m_nSample = 1;
- if (nDet < 1)
- nDet = 1;
- if ((nDet % 2) == 0)
- ++nDet; // ensure odd number of detectors
m_nDet = nDet;
m_nView = nView;
+ m_iOffsetView = offsetView;
m_nSample = nSample;
- m_detLen = SQRT2 * m_phmLen * ((m_nDet + N_EXTRA_DETECTORS) / static_cast<double>(m_nDet));
+ m_dFocalLengthRatio = dFocalLengthRatio;
+ m_dCenterDetectorRatio = dCenterDetectorRatio;
+ m_dViewRatio = dViewRatio;
+ m_dScanRatio = dScanRatio;
+
+ m_dViewDiameter = phm.getDiameterBoundaryCircle() * m_dViewRatio;
+ m_dFocalLength = (m_dViewDiameter / 2) * m_dFocalLengthRatio;
+ m_dCenterDetectorLength = (m_dViewDiameter / 2) * m_dCenterDetectorRatio;
+ m_dSourceDetectorLength = m_dFocalLength + m_dCenterDetectorLength;
+ m_dScanDiameter = m_dViewDiameter * m_dScanRatio;
+
+ m_dXCenter = phm.xmin() + (phm.xmax() - phm.xmin()) / 2;
+ m_dYCenter = phm.ymin() + (phm.ymax() - phm.ymin()) / 2;
+ m_rotLen = rot_anglen;
+ m_rotInc = m_rotLen / m_nView;
+ if (m_idGeometry == GEOMETRY_PARALLEL) {
+ m_dFanBeamAngle = 0;
+ m_detLen = m_dScanDiameter;
+ m_detStart = -m_detLen / 2;
+ m_detInc = m_detLen / m_nDet;
+ double dDetectorArrayEndOffset = 0;
+ // For even number of detectors, make detInc slightly larger so that center lies
+ // at nDet/2. Also, extend detector array by one detInc so that all of the phantom is scanned
+ if (isEven (m_nDet)) { // Adjust for Even number of detectors
+ m_detInc = m_detLen / (m_nDet - 1); // center detector = (nDet/2)
+ dDetectorArrayEndOffset = m_detInc;
+ }
- m_rotLen = rot_anglen;
+ double dHalfDetLen = m_detLen / 2;
+ m_initPos.xs1 = m_dXCenter - dHalfDetLen;
+ m_initPos.ys1 = m_dYCenter + m_dFocalLength;
+ m_initPos.xs2 = m_dXCenter + dHalfDetLen + dDetectorArrayEndOffset;
+ m_initPos.ys2 = m_dYCenter + m_dFocalLength;
+ m_initPos.xd1 = m_dXCenter - dHalfDetLen;
+ m_initPos.yd1 = m_dYCenter - m_dCenterDetectorLength;
+ m_initPos.xd2 = m_dXCenter + dHalfDetLen + dDetectorArrayEndOffset;
+ m_initPos.yd2 = m_dYCenter - m_dCenterDetectorLength;
+ m_initPos.angle = m_iOffsetView * m_rotInc;
+ m_detLen += dDetectorArrayEndOffset;
+ } else if (m_idGeometry == GEOMETRY_EQUILINEAR) {
+ if (m_dScanDiameter / 2 >= m_dFocalLength) {
+ m_fail = true;
+ m_failMessage = "Invalid geometry: Focal length must be larger than scan length";
+ return;
+ }
- m_radius = m_detLen / 2;
- m_detInc = m_detLen / m_nDet;
- m_rotInc = m_rotLen / m_nView;
+ const double dAngle = asin ((m_dScanDiameter / 2) / m_dFocalLength);
+ const double dHalfDetLen = m_dSourceDetectorLength * tan (dAngle);
+
+ m_detLen = dHalfDetLen * 2;
+ m_detStart = -dHalfDetLen;
+ m_detInc = m_detLen / m_nDet;
+ double dDetectorArrayEndOffset = 0;
+ if (isEven (m_nDet)) { // Adjust for Even number of detectors
+ m_detInc = m_detLen / (m_nDet - 1); // center detector = (nDet/2)
+ dDetectorArrayEndOffset = m_detInc;
+ m_detLen += dDetectorArrayEndOffset;
+ }
+
+ m_dFanBeamAngle = dAngle * 2;
+ m_initPos.xs1 = m_dXCenter;
+ m_initPos.ys1 = m_dYCenter + m_dFocalLength;
+ m_initPos.xs2 = m_dXCenter;
+ m_initPos.ys2 = m_dYCenter + m_dFocalLength;
+ m_initPos.xd1 = m_dXCenter - dHalfDetLen;
+ m_initPos.yd1 = m_dYCenter - m_dCenterDetectorLength;
+ m_initPos.xd2 = m_dXCenter + dHalfDetLen + dDetectorArrayEndOffset;
+ m_initPos.yd2 = m_dYCenter - m_dCenterDetectorLength;
+ m_initPos.angle = m_iOffsetView * m_rotInc;
+ } else if (m_idGeometry == GEOMETRY_EQUIANGULAR) {
+ if (m_dScanDiameter / 2 > m_dFocalLength) {
+ m_fail = true;
+ m_failMessage = "Invalid geometry: Focal length must be larger than scan length";
+ return;
+ }
+ const double dAngle = asin ((m_dScanDiameter / 2) / m_dFocalLength);
+
+ m_detLen = 2 * dAngle;
+ m_detStart = -dAngle;
+ m_detInc = m_detLen / m_nDet;
+ double dDetectorArrayEndOffset = 0;
+ if (isEven (m_nDet)) { // Adjust for Even number of detectors
+ m_detInc = m_detLen / (m_nDet - 1); // center detector = (nDet/2)
+ dDetectorArrayEndOffset = m_detInc;
+ }
+ // adjust for center-detector length
+ double dA1 = acos ((m_dScanDiameter / 2) / m_dCenterDetectorLength);
+ double dAngularScale = 2 * (HALFPI + dAngle - dA1) / m_detLen;
+
+ m_dAngularDetLen = dAngularScale * (m_detLen + dDetectorArrayEndOffset);
+ m_dAngularDetIncrement = dAngularScale * m_detInc;
+ m_initPos.dAngularDet = -m_dAngularDetLen / 2;
+
+ m_dFanBeamAngle = dAngle * 2;
+ m_initPos.angle = m_iOffsetView * m_rotInc;
+ m_initPos.xs1 = m_dXCenter;
+ m_initPos.ys1 = m_dYCenter + m_dFocalLength;;
+ m_initPos.xs2 = m_dXCenter;
+ m_initPos.ys2 = m_dYCenter + m_dFocalLength;
+ m_detLen += dDetectorArrayEndOffset;
+ }
+
+ // Calculate incrementatal rotation matrix
+ GRFMTX_2D temp;
+ xlat_mtx2 (m_rotmtxIncrement, -m_dXCenter, -m_dYCenter);
+ rot_mtx2 (temp, m_rotInc);
+ mult_mtx2 (m_rotmtxIncrement, temp, m_rotmtxIncrement);
+ xlat_mtx2 (temp, m_dXCenter, m_dYCenter);
+ mult_mtx2 (m_rotmtxIncrement, temp, m_rotmtxIncrement);
- m_initPos.xd1 = m_detLen / 2;
- m_initPos.yd1 = -m_detLen / 2;
- m_initPos.xd2 = m_detLen / 2;
- m_initPos.yd2 = m_detLen / 2;
- m_initPos.xs1 = -m_detLen / 2;
- m_initPos.ys1 = -m_detLen / 2;
- m_initPos.xs2 = -m_detLen / 2;
- m_initPos.ys2 = m_detLen / 2;
- m_initPos.angle = 0.0;
}
Scanner::~Scanner (void)
const char *name = "";
if (geomID >= 0 && geomID < s_iGeometryCount)
- return (s_aszGeometryName[geomID]);
+ return (s_aszGeometryName[geomID]);
return (name);
}
const char *title = "";
if (geomID >= 0 && geomID < s_iGeometryCount)
- return (s_aszGeometryName[geomID]);
+ return (s_aszGeometryName[geomID]);
return (title);
}
-
+
int
-Scanner::convertGeometryNameToID (const char* const geomName)
+Scanner::convertGeometryNameToID (const char* const geomName)
{
int id = GEOMETRY_INVALID;
- for (int i = 0; i < s_iGeometryCount; i++)
- if (strcasecmp (geomName, s_aszGeometryName[i]) == 0) {
- id = i;
- break;
- }
-
+ for (int i = 0; i < s_iGeometryCount; i++) {
+ if (strcasecmp (geomName, s_aszGeometryName[i]) == 0) {
+ id = i;
+ break;
+ }
+ }
return (id);
}
-
+
/* NAME
- * raysum_collect Calculate ray sums for a Phantom
- *
- * SYNOPSIS
- * rs = raysum_collect (det, phm, start_view, trace, unit_pulse)
- * Scanner& det Scanner specifications**
- * RAYSUM *rs Calculated ray sum matrix
- * Phantom& phm Phantom we are taking ray sums of
- * int trace Boolean flag to signal ray sum tracing
+* collectProjections Calculate projections for a Phantom
+*
+* SYNOPSIS
+* collectProjections (proj, phm, start_view, nView, bStoreViewPos, trace)
+* Projectrions& proj Projection storage
+* Phantom& phm Phantom for which we collect projections
+* bool bStoreViewPos TRUE then storage proj at normal view position
+* int trace Trace level
*/
+
void
-Scanner::collectProjections (Projections& proj, const Phantom& phm, const int start_view, const int trace = TRACE_NONE, SGP* pSGP = NULL)
+Scanner::collectProjections (Projections& proj, const Phantom& phm, const int trace, SGP* pSGP)
{
- GRFMTX_2D rotmtx_initial, temp;
- GRFMTX_2D rotmtx_incr;
-
- double start_angle = start_view * proj.rotInc();
- double xcent = phm.xmin() + (phm.xmax() - phm.xmin()) / 2;
- double ycent = phm.ymin() + (phm.ymax() - phm.ymin()) / 2;
-
- double xd1 = xcent + m_initPos.xd1;
- double yd1 = ycent + m_initPos.yd1;
- double xd2 = xcent + m_initPos.xd2;
- double yd2 = ycent + m_initPos.yd2;
- double xs1 = xcent + m_initPos.xs1;
- double ys1 = ycent + m_initPos.ys1;
- double xs2 = xcent + m_initPos.xs2;
- double ys2 = ycent + m_initPos.ys2;
-
- m_trace = trace;
+ collectProjections (proj, phm, m_startView, proj.nView(), m_iOffsetView, true, trace, pSGP);
+}
+
+void
+Scanner::collectProjections (Projections& proj, const Phantom& phm, const int iStartView,
+ const int iNumViews, const int iOffsetView, bool bStoreAtViewPosition,
+ const int trace, SGP* pSGP)
+{
+ int iStorageOffset = (bStoreAtViewPosition ? iStartView : 0);
+ collectProjections (proj, phm, iStartView, iNumViews, iOffsetView, iStorageOffset, trace, pSGP);
+}
-#ifdef HAVE_SGP
- if (pSGP && m_trace >= TRACE_PHM) {
- double wsize = 1.42 * m_phmLen / 2; /* sqrt(2) * radius */
+static void mtx2_offset_rot (GRFMTX_2D m, double angle, double x, double y) {
+ GRFMTX_2D temp;
+ xlat_mtx2 (m, -x, -y);
+ rot_mtx2 (temp, angle);
+ mult_mtx2 (m, temp, m);
+ xlat_mtx2 (temp, x, y);
+ mult_mtx2 (m, temp, m);
+}
- pSGP->setColor (C_LTBLUE);
- pSGP->setWindow (xcent - wsize, ycent - wsize, xcent + wsize, ycent + wsize);
- pSGP->setColor (C_BROWN);
-#if RADIUS
- pSGP->drawCircle (m_phmLen / 2);
-#else
- pSGP->drawRect (xcent - m_phmLen / 2, ycent - m_phmLen / 2,
- xcent + m_phmLen / 2, ycent + m_phmLen / 2);
+void
+Scanner::collectProjections (Projections& proj, const Phantom& phm, const int iStartView,
+ const int iNumViews, const int iOffsetView, int iStorageOffset,
+ const int trace, SGP* pSGP)
+{
+ m_trace = trace;
+ double start_angle = (iStartView + iOffsetView) * proj.rotInc();
+ int parallel_enabled = 1;
+ UNUSED(parallel_enabled);
+
+#if HAVE_SGP
+ if (pSGP && (m_trace >= Trace::TRACE_PHANTOM))
+ parallel_enabled = 0;
#endif
- pSGP->setColor (C_BROWN);
- pSGP->moveAbs (0., 0.);
- pSGP->drawCircle (wsize);
- // raysum_trace_menu_column = (crt->xsize * crt->asp) / 8 + 3;
- traceShowParam ("X-Ray Simulator", "%s", RAYSUM_TRACE_ROW_TITLE, C_BLACK, " ");
- traceShowParam ("---------------", "%s", RAYSUM_TRACE_ROW_TITLE2, C_BLACK, " ");
- traceShowParam ("Phantom:", "%s", RAYSUM_TRACE_ROW_PHANT_ID, C_YELLOW, " Herman");
- traceShowParam ("Chomaticity :", "%s", RAYSUM_TRACE_ROW_CHROMATIC, C_LTGREEN, "Mono");
- traceShowParam ("Scatter :", "%5.1f", RAYSUM_TRACE_ROW_SCATTER, C_LTGREEN, 0.);
- traceShowParam ("Photon Uncert:", "%5.1f", RAYSUM_TRACE_ROW_PHOT_STAT, C_LTGREEN, 0.);
- traceShowParam ("Num Scanners:", "%5d", RAYSUM_TRACE_ROW_NDET, C_LTRED, proj.nDet());
- traceShowParam ("Num Views :", "%5d", RAYSUM_TRACE_ROW_NVIEW, C_LTRED, proj.nView());
- traceShowParam ("Samples / Ray:", "%5d", RAYSUM_TRACE_ROW_SAMPLES, C_LTRED, m_nSample);
-
- pSGP->setColor (C_LTGREEN);
- phm.draw (*pSGP);
-
- pSGP->setMarker (SGP::MARK_BDIAMOND, C_LTGREEN);
- }
+
+#if HAVE_OPENMP
+ #pragma omp parallel for if (parallel_enabled)
#endif
+ for (int iView = 0; iView < iNumViews; iView++) {
+ double viewAngle = start_angle + (iView * proj.rotInc());
+
+ // With OpenMP, need to calculate source and detector positions at each view
+ GRFMTX_2D rotmtx;
+ mtx2_offset_rot (rotmtx, viewAngle, m_dXCenter, m_dYCenter);
+ double xd1=0, yd1=0, xd2=0, yd2=0;
+ if (m_idGeometry != GEOMETRY_EQUIANGULAR) {
+ xd1 = m_initPos.xd1; yd1 = m_initPos.yd1;
+ xd2 = m_initPos.xd2; yd2 = m_initPos.yd2;
+ xform_mtx2 (rotmtx, xd1, yd1); // rotate detector endpoints
+ xform_mtx2 (rotmtx, xd2, yd2); // to initial view_angle
+ }
+
+ double xs1 = m_initPos.xs1, ys1 = m_initPos.ys1;
+ double xs2 = m_initPos.xs2, ys2 = m_initPos.ys2;
+ xform_mtx2 (rotmtx, xs1, ys1); // rotate source endpoints to
+ xform_mtx2 (rotmtx, xs2, ys2); // initial view angle
-/* Calculate initial rotation matrix */
- xlat_mtx2 (rotmtx_initial, -xcent, -ycent);
- rot_mtx2 (temp, start_angle);
- mult_mtx2 (rotmtx_initial, temp, rotmtx_initial);
- xlat_mtx2 (temp, xcent, ycent);
- mult_mtx2 (rotmtx_initial, temp, rotmtx_initial);
-
- xform_mtx2 (rotmtx_initial, xd1, yd1); /* rotate detector endpoints */
- xform_mtx2 (rotmtx_initial, xd2, yd2); /* to initial view_angle */
- xform_mtx2 (rotmtx_initial, xs1, ys1);
- xform_mtx2 (rotmtx_initial, xs2, ys2);
-
-/* Calculate incrementatal rotation matrix */
- xlat_mtx2 (rotmtx_incr, -xcent, -ycent);
- rot_mtx2 (temp, proj.rotInc());
- mult_mtx2 (rotmtx_incr, temp, rotmtx_incr);
- xlat_mtx2 (temp, xcent, ycent);
- mult_mtx2 (rotmtx_incr, temp, rotmtx_incr);
-
- int iview;
- double viewAngle;
- for (iview = 0, viewAngle = start_angle; iview < proj.nView(); iview++, viewAngle += proj.rotInc()) {
- DetectorArray& detArray = proj.getDetectorArray( iview );
+ int iStoragePosition = iView + iStorageOffset;
+ DetectorArray& detArray = proj.getDetectorArray( iStoragePosition );
#ifdef HAVE_SGP
- if (pSGP && m_trace >= TRACE_PHM) {
- pSGP->moveAbs (xd1, yd1);
- pSGP->lineAbs (xd2, yd2);
- pSGP->moveAbs (xs1, ys1);
- pSGP->lineAbs (xs2, ys2);
+ if (pSGP && m_trace >= Trace::TRACE_PHANTOM) {
+ m_pSGP = pSGP;
+ double dWindowSize = dmax (m_detLen, m_dSourceDetectorLength) * 2;
+ double dHalfWindowSize = dWindowSize / 2;
+ m_dXMinWin = m_dXCenter - dHalfWindowSize;
+ m_dXMaxWin = m_dXCenter + dHalfWindowSize;
+ m_dYMinWin = m_dYCenter - dHalfWindowSize;
+ m_dYMaxWin = m_dYCenter + dHalfWindowSize;
+
+ m_pSGP->setWindow (m_dXMinWin, m_dYMinWin, m_dXMaxWin, m_dYMaxWin);
+ m_pSGP->setRasterOp (RO_COPY);
+
+ m_pSGP->setColor (C_RED);
+ m_pSGP->moveAbs (0., 0.);
+ m_pSGP->drawCircle (m_dViewDiameter / 2);
+
+ m_pSGP->moveAbs (0., 0.);
+ m_pSGP->setColor (C_GREEN);
+ m_pSGP->drawCircle (m_dFocalLength);
+ m_pSGP->setColor (C_BLUE);
+ m_pSGP->setTextPointSize (9);
+ phm.draw (*m_pSGP);
+ m_dTextHeight = m_pSGP->getCharHeight ();
+
+ traceShowParam ("Phantom:", "%s", PROJECTION_TRACE_ROW_PHANT_ID, C_BLACK, phm.name().c_str());
+ traceShowParam ("Geometry:", "%s", PROJECTION_TRACE_ROW_GEOMETRY, C_BLUE, convertGeometryIDToName(m_idGeometry));
+ traceShowParam ("Focal Length Ratio:", "%.2f", PROJECTION_TRACE_ROW_FOCAL_LENGTH, C_BLUE, m_dFocalLengthRatio);
+ // traceShowParam ("Field Of View Ratio:", "%.2f", PROJECTION_TRACE_ROW_FIELD_OF_VIEW, C_BLUE, m_dFieldOfViewRatio);
+ traceShowParam ("Num Detectors:", "%d", PROJECTION_TRACE_ROW_NDET, C_BLUE, proj.nDet());
+ traceShowParam ("Num Views:", "%d", PROJECTION_TRACE_ROW_NVIEW, C_BLUE, proj.nView());
+ traceShowParam ("Samples / Ray:", "%d", PROJECTION_TRACE_ROW_SAMPLES, C_BLUE, m_nSample);
+
+ m_pSGP->setMarker (SGP::MARKER_BDIAMOND);
+
+ m_pSGP->setColor (C_BLACK);
+ m_pSGP->setPenWidth (2);
+ if (m_idGeometry == GEOMETRY_PARALLEL) {
+ m_pSGP->moveAbs (xs1, ys1);
+ m_pSGP->lineAbs (xs2, ys2);
+ m_pSGP->moveAbs (xd1, yd1);
+ m_pSGP->lineAbs (xd2, yd2);
+ } else if (m_idGeometry == GEOMETRY_EQUILINEAR) {
+ m_pSGP->setPenWidth (4);
+ m_pSGP->moveAbs (xs1, ys1);
+ m_pSGP->lineAbs (xs2, ys2);
+ m_pSGP->setPenWidth (2);
+ m_pSGP->moveAbs (xd1, yd1);
+ m_pSGP->lineAbs (xd2, yd2);
+ } else if (m_idGeometry == GEOMETRY_EQUIANGULAR) {
+ m_pSGP->setPenWidth (4);
+ m_pSGP->moveAbs (xs1, ys1);
+ m_pSGP->lineAbs (xs2, ys2);
+ m_pSGP->setPenWidth (2);
+ m_pSGP->moveAbs (0., 0.);
+ m_pSGP->drawArc (m_dCenterDetectorLength, viewAngle + 3 * HALFPI - (m_dAngularDetLen/2), viewAngle + 3 * HALFPI + (m_dAngularDetLen/2));
+ }
+ m_pSGP->setPenWidth (1);
}
+ if (m_trace > Trace::TRACE_CONSOLE)
+ traceShowParam ("Current View:", "%d (%.0f%%)", PROJECTION_TRACE_ROW_CURR_VIEW, C_RED, iView + iStartView, (iView + iStartView) / static_cast<double>(m_nView) * 100.);
#endif
- if (m_trace)
- traceShowParam ("Current View :", "%5d", RAYSUM_TRACE_ROW_CURR_VIEW, C_LTMAGENTA, iview);
-
- projectSingleView (phm, detArray, xd1, yd1, xd2, yd2, xs1, ys1, xs2, ys2, pSGP);
+
+ if (m_trace == Trace::TRACE_CONSOLE)
+ std::cout << "Current View: " << iView+iStartView << std::endl;
+
+ projectSingleView (phm, detArray, xd1, yd1, xd2, yd2, xs1, ys1, xs2, ys2, viewAngle + 3 * HALFPI);
detArray.setViewAngle (viewAngle);
-
+
#ifdef HAVE_SGP
- if (pSGP && m_trace >= TRACE_PHM) {
- // rs_plot (detArray, xd1, yd1, xcent, ycent, theta);
- pSGP->moveAbs (xd1, yd1);
- pSGP->lineAbs (xd2, yd2);
- pSGP->moveAbs (xs1, ys1);
- pSGP->lineAbs (xs2, ys2);
+ if (m_pSGP && m_trace >= Trace::TRACE_PHANTOM) {
+ // rs_plot (detArray, xd1, yd1, dXCenter, dYCenter, theta);
}
#endif
- xform_mtx2 (rotmtx_incr, xd1, yd1); // rotate detector endpoints
- xform_mtx2 (rotmtx_incr, xd2, yd2);
- xform_mtx2 (rotmtx_incr, xs1, ys1);
- xform_mtx2 (rotmtx_incr, xs2, ys2);
- } /* for each iview */
+
+ } /* for each iView */
}
/* NAME
- * rayview Calculate raysums for a view at any angle
- *
- * SYNOPSIS
- * rayview (phm, detArray, xd1, nSample, yd1, xd2, yd2, xs1, ys1, xs2, ys2)
- * Phantom& phm Phantom to scan
- * DETARRAY *detArray Storage of values for detector array
- * Scanner& det Scanner parameters
- * double xd1, yd1, xd2, yd2 Beginning & ending detector positions
- * double xs1, ys1, xs2, ys2 Beginning & ending source positions
- *
- * RAY POSITIONING
- * For each detector, have there are a variable number of rays traced.
- * The source of each ray is the center of the source x-ray cell. The
- * detector positions are equally spaced within the cell
- *
- * The increments between rays are calculated so that the cells start
- * at the beginning of a detector cell and they end on the endpoint
- * of the cell. Thus, the last cell starts at (xd2-ddx),(yd2-ddy).
- * The exception to this is if there is only one ray per detector.
- * In that case, the detector position is the center of the detector cell.
- */
+* rayview Calculate raysums for a view at any angle
+*
+* SYNOPSIS
+* rayview (phm, detArray, xd1, nSample, yd1, xd2, yd2, xs1, ys1, xs2, ys2)
+* Phantom& phm Phantom to scan
+* DETARRAY *detArray Storage of values for detector array
+* Scanner& det Scanner parameters
+* double xd1, yd1, xd2, yd2 Beginning & ending detector positions
+* double xs1, ys1, xs2, ys2 Beginning & ending source positions
+*
+* RAY POSITIONING
+* For each detector, have there are a variable number of rays traced.
+* The source of each ray is the center of the source x-ray cell. The
+* detector positions are equally spaced within the cell
+*
+* The increments between rays are calculated so that the cells start
+* at the beginning of a detector cell and they end on the endpoint
+* of the cell. Thus, the last cell starts at (xd2-ddx),(yd2-ddy).
+* The exception to this is if there is only one ray per detector.
+* In that case, the detector position is the center of the detector cell.
+*/
-void
-Scanner::projectSingleView (const Phantom& phm, DetectorArray& detArray, const double xd1, const double yd1, const double xd2, const double yd2, const double xs1, const double ys1, const double xs2, const double ys2, SGP* pSGP)
+void
+Scanner::projectSingleView (const Phantom& phm, DetectorArray& detArray, const double xd1, const double yd1, const double xd2, const double yd2, const double xs1, const double ys1, const double xs2, const double ys2, const double dDetAngle)
{
- double ddx = (xd2 - xd1) / detArray.nDet(); // change in coords between detectors
- double ddy = (yd2 - yd1) / detArray.nDet();
- double sdx = (xs2 - xs1) / detArray.nDet(); // change in coords between source
- double sdy = (ys2 - ys1) / detArray.nDet();
-
- double ddx2 = ddx / m_nSample; // Incr. between rays with detector cell
- double ddy2 = ddy / m_nSample; // Doesn't include detector endpoints
- double ddx2_ofs = ddx2 / 2; // offset of 1st ray from start of detector cell
- double ddy2_ofs = ddy2 / 2;
-
- double xd_maj = xd1 + ddx2_ofs; // Incr. between detector cells
- double yd_maj = yd1 + ddy2_ofs;
- double xs_maj = xs1 + (sdx / 2); // put ray source in center of cell
+
+ double sdx = (xs2 - xs1) / detArray.nDet(); // change in coords
+ double sdy = (ys2 - ys1) / detArray.nDet(); // between source
+ double xs_maj = xs1 + (sdx / 2); // put ray source in center of cell
double ys_maj = ys1 + (sdy / 2);
+ double ddx=0, ddy=0, ddx2=0, ddy2=0, ddx2_ofs=0, ddy2_ofs=0, xd_maj=0, yd_maj=0;
+ double dAngleInc=0, dAngleSampleInc=0, dAngleSampleOffset=0, dAngleMajor=0;
+ if (m_idGeometry == GEOMETRY_EQUIANGULAR) {
+ dAngleInc = m_dAngularDetIncrement;
+ dAngleSampleInc = dAngleInc / m_nSample;
+ dAngleSampleOffset = dAngleSampleInc / 2;
+ dAngleMajor = dDetAngle - (m_dAngularDetLen/2) + dAngleSampleOffset;
+ } else {
+ ddx = (xd2 - xd1) / detArray.nDet(); // change in coords
+ ddy = (yd2 - yd1) / detArray.nDet(); // between detectors
+ ddx2 = ddx / m_nSample; // Incr. between rays with detector cell
+ ddy2 = ddy / m_nSample; // Doesn't include detector endpoints
+ ddx2_ofs = ddx2 / 2; // offset of 1st ray from start of detector cell
+ ddy2_ofs = ddy2 / 2;
+
+ xd_maj = xd1 + ddx2_ofs; // Incr. between detector cells
+ yd_maj = yd1 + ddy2_ofs;
+ }
+
DetectorValue* detval = detArray.detValues();
if (phm.getComposition() == P_UNIT_PULSE) { // put unit pulse in center of view
for (int d = 0; d < detArray.nDet(); d++)
- if (detArray.nDet() / 2 == d && (d % 2) == 1)
- detval[d] = 1;
- else
- detval[d] = 0;
+ detval[d] = 0;
+ detval[ detArray.nDet() / 2 ] = 1;
} else {
for (int d = 0; d < detArray.nDet(); d++) {
- double xd = xd_maj;
- double yd = yd_maj;
double xs = xs_maj;
double ys = ys_maj;
+ double xd=0, yd=0, dAngle=0;
+ if (m_idGeometry == GEOMETRY_EQUIANGULAR) {
+ dAngle = dAngleMajor;
+ } else {
+ xd = xd_maj;
+ yd = yd_maj;
+ }
double sum = 0.0;
for (unsigned int i = 0; i < m_nSample; i++) {
+ if (m_idGeometry == GEOMETRY_EQUIANGULAR) {
+ xd = m_dCenterDetectorLength * cos (dAngle);
+ yd = m_dCenterDetectorLength * sin (dAngle);
+ }
+
#ifdef HAVE_SGP
- if (pSGP && m_trace >= TRACE_RAYS) {
- pSGP->moveAbs (xs, ys);
- pSGP->lineAbs (xd, yd);
- }
+ if (m_pSGP && m_trace >= Trace::TRACE_PROJECTIONS) {
+ m_pSGP->setColor (C_YELLOW);
+ m_pSGP->setRasterOp (RO_AND);
+ m_pSGP->moveAbs (xs, ys);
+ m_pSGP->lineAbs (xd, yd);
+ }
#endif
- sum += projectSingleLine (phm, xd, yd, xs, ys, pSGP);
-
- if (m_trace >= TRACE_RAYS)
- traceShowParam ("Attenuation :", "%5.2f", RAYSUM_TRACE_ROW_ATTEN, C_LTMAGENTA, "sum");
+
+ sum += projectSingleLine (phm, xd, yd, xs, ys);
#ifdef HAVE_SGP
- if (pSGP && m_trace >= TRACE_RAYS) {
- pSGP->moveAbs (xs, ys);
- pSGP->lineAbs (xd, yd);
- }
+ // if (m_trace >= Trace::TRACE_CLIPPING) {
+ // traceShowParam ("Attenuation:", "%s", PROJECTION_TRACE_ROW_ATTEN, C_LTMAGENTA, " ");
+ // traceShowParam ("Attenuation:", "%.3f", PROJECTION_TRACE_ROW_ATTEN, C_LTMAGENTA, sum);
+ // }
#endif
- xd += ddx2;
- yd += ddy2;
- }
+ if (m_idGeometry == GEOMETRY_EQUIANGULAR)
+ dAngle += dAngleSampleInc;
+ else {
+ xd += ddx2;
+ yd += ddy2;
+ }
+ } // for each sample in detector
detval[d] = sum / m_nSample;
- xd_maj += ddx;
- yd_maj += ddy;
xs_maj += sdx;
ys_maj += sdy;
+ if (m_idGeometry == GEOMETRY_EQUIANGULAR)
+ dAngleMajor += dAngleInc;
+ else {
+ xd_maj += ddx;
+ yd_maj += ddy;
+ }
} /* for each detector */
} /* if not unit pulse */
}
-void
-Scanner::traceShowParam (const char *label, const char *fmt, int row, int color, ...)
-{
- char s[80];
+void
+Scanner::traceShowParam (const char *szLabel, const char *fmt, int row, int color, ...)
+{
va_list arg;
+ va_start(arg, color);
+#ifdef HAVE_SGP
+ traceShowParamRasterOp (RO_COPY, szLabel, fmt, row, color, arg);
+#else
+ traceShowParamRasterOp (0, szLabel, fmt, row, color, arg);
+#endif
+ va_end(arg);
+}
+void
+Scanner::traceShowParamXOR (const char *szLabel, const char *fmt, int row, int color, ...)
+{
+ va_list arg;
va_start(arg, color);
- // cio_set_cpos (raysum_trace_menu_column, row);
- snprintf (s, sizeof(s), label, "%s");
- // cio_set_text_clr (color - 8, 0);
- cio_put_str (s);
- vsnprintf (s, sizeof(s), fmt, arg);
- // cio_set_text_clr (color, 0);
- cio_put_str (s);
- cout << "\n";
+#ifdef HAVE_SGP
+ traceShowParamRasterOp (RO_XOR, szLabel, fmt, row, color, arg);
+#else
+ traceShowParamRasterOp (0, szLabel, fmt, row, color, arg);
+#endif
va_end(arg);
}
+void
+Scanner::traceShowParamRasterOp (int iRasterOp, const char *szLabel, const char *fmt, int row, int color, va_list args)
+{
+ char szValue[256];
-/* NAME
- * projectSingleLine INTERNAL: Calculates raysum along a line for a Phantom
- *
- * SYNOPSIS
- * rsum = phm_ray_attenuation (phm, x1, y1, x2, y2)
- * double rsum Ray sum of Phantom along given line
- * Phantom& phm; Phantom from which to calculate raysum
- * double *x1, *y1, *x2, y2 Endpoints of ray path (in Phantom coords)
+ vsnprintf (szValue, sizeof(szValue), fmt, args);
+
+#ifdef HAVE_SGP
+ if (m_pSGP) {
+ m_pSGP->setRasterOp (iRasterOp);
+ m_pSGP->setTextColor (color, -1);
+ double dValueOffset = (m_dXMaxWin - m_dXMinWin) / 4;
+ if (row < 4) {
+ double dYPos = m_dYMaxWin - (row * m_dTextHeight);
+ double dXPos = m_dXMinWin;
+ m_pSGP->moveAbs (dXPos, dYPos);
+ m_pSGP->drawText (szLabel);
+ m_pSGP->moveAbs (dXPos + dValueOffset, dYPos);
+ m_pSGP->drawText (szValue);
+ } else {
+ row -= 4;
+ double dYPos = m_dYMaxWin - (row * m_dTextHeight);
+ double dXPos = m_dXMinWin + (m_dXMaxWin - m_dXMinWin) * 0.5;
+ m_pSGP->moveAbs (dXPos, dYPos);
+ m_pSGP->drawText (szLabel);
+ m_pSGP->moveAbs (dXPos + dValueOffset, dYPos);
+ m_pSGP->drawText (szValue);
+ }
+ } else
+#endif
+ {
+ cio_put_str (szLabel);
+ cio_put_str (szValue);
+ cio_put_str ("\n");
+ }
+}
+
+void swap_xy_points (double& x1, double& y1, double& x2, double& y2)
+{
+ double temp = x1; x1 = x2; x2 = temp;
+ temp = y1; y1 = y2; y2 = temp;
+}
+
+class WeightedPoint {
+public:
+ int x, y;
+ double weight;
+ WeightedPoint (int _x, int _y, double _weight)
+ : x(_x), y(_y), weight(_weight)
+ {}
+};
+
+
+/* FUNCTION
+ * Name: projection_pixel_weights
+ * Purpose: Returns a vector of WeightedPoint with the length of
+ * line that intersects with each pixel
*/
-double
-Scanner::projectSingleLine (const Phantom& phm, const double x1, const double y1, const double x2, const double y2, SGP* pSGP)
+void
+projection_pixel_weights (std::vector<WeightedPoint>& wp, const int nx, const int ny,
+ double x1, double y1, double x2, double y2)
+{
+ double ylen = fabs(y2-y1);
+ double xlen = fabs(x2-x1);
+ bool swap_xy = false, invert_slope = false;
+ double slope;
+
+ if (ylen > xlen) {
+ swap_xy = true;
+ slope = xlen / ylen;
+ if (y2 < y1) // swap start/end so always moving from bottom to top
+ swap_xy_points (x1, y1, x2, y2);
+ if (x2 < x1) {
+ invert_slope = true;
+ }
+ } else {
+#if DEBUG
+ if (ylen == xlen)
+ sys_error(ERR_WARNING, "Slope == 1");
+#endif
+ slope = ylen / xlen;
+ if (x2 < x1) // swap start/end so always moving from left to right in image
+ swap_xy_points (x1, y1, x2, y2);
+ if (y2 < y1) {
+ invert_slope = true;
+ }
+ }
+ double angle = atan(fabs(slope));
+ double minor_dist = sin(angle); // distance along minor axis
+ double pixel_len = 1 / cos(angle);
+
+ int minor_dir = 1;
+ if (invert_slope) {
+ minor_dir = -1;
+ slope = -slope;
+ }
+
+ double x = x1, y = y1;
+ int ix = floor(x);
+ int iy = floor(y);
+ double ydelta = y - iy;
+ double xdelta = x - ix;
+
+ double min_delta;
+ int *imaj, *imin;
+ int max_maj, max_min;
+ if (swap_xy) {
+ min_delta = xdelta;
+ imaj = &iy;
+ imin = &ix;
+ max_maj = ny;
+ max_min = nx;
+ } else {
+ min_delta = ydelta;
+ imaj = &ix;
+ imin = &iy;
+ max_maj = nx;
+ max_min = ny;
+ }
+
+#if DEBUG
+ sys_error(ERR_TRACE, "m=%6.3f swap_xy=%d invert=%d len=%8.6f min_delta=%.4g minor_dist=%6.3f (%.3f,%.3f)-(%.3f,%.3f)",
+ slope, swap_xy, invert_slope, pixel_len, min_delta, minor_dist, x1, y1, x2, y2);
+#endif
+
+ // if position of minor axis is at edge of image, but will be moving into pixel within image
+ if (*imin == max_min && invert_slope) {
+ (*imin)--; // select the pixel within image
+#if DEBUG
+ sys_error(ERR_TRACE, "Moving pixel inside image, adding %f to min_delta", (1+slope));
+#endif
+ min_delta += (1+slope);
+ }
+
+ while (*imaj < max_maj && *imin < max_min && *imin >= 0) {
+ double next_min_delta = min_delta + slope;
+
+ if (((!invert_slope) && (next_min_delta < 1)) ||
+ (invert_slope && (next_min_delta > 0))) {
+ // stay within same pixel
+ double w = pixel_len;
+ WeightedPoint p (ix, iy, w);
+ wp.push_back(p);
+#if DEBUG
+ sys_error(ERR_TRACE, " Full pixel: (%3d,%3d)=%.4g, min_delta=%.4g", ix, iy, w, min_delta);
+#endif
+ min_delta = next_min_delta;
+ } else {
+ // Scale partial pixel_len into pixel
+ double norm_delta = invert_slope ? min_delta : (1 - min_delta);
+ double p1_line = norm_delta * pixel_len;
+ WeightedPoint p1 (ix, iy, p1_line);
+ wp.push_back (p1);
+#if DEBUG
+ sys_error(ERR_TRACE, " Part pixel: (%3d,%3d)=%.4g, min_delta=%.4g", ix, iy, p1_line, min_delta);
+#endif
+ (*imin) += minor_dir;
+ min_delta = next_min_delta - minor_dir;
+ }
+ (*imaj)++;
+ }
+
+}
+
+
+/* NAME
+* projectSingleLine INTERNAL: Calculates raysum along a line for a Phantom
+*
+* SYNOPSIS
+* rsum = phm_ray_attenuation (phm, x1, y1, x2, y2)
+* double rsum Ray sum of Phantom along given line
+* Phantom& phm; Phantom from which to calculate raysum
+* double *x1, *y1, *x2, y2 Endpoints of ray path (in Phantom coords)
+*/
+
+double
+Scanner::projectSingleLine (const Phantom& phm, double x1, double y1, double x2, double y2)
{
- // check ray against each pelem in Phantom
double rsum = 0.0;
- for (PElemConstIterator i = phm.listPElem().begin(); i != phm.listPElem().end(); i++)
- rsum += projectLineAgainstPElem (**i, x1, y1, x2, y2, pSGP);
+ if (phm.isImagefile()) {
+ // Project through an imagefile
+
+ const ImageFile* im = phm.getImagefile();
+ const ImageFileArray v = im->getArray();
+
+ // Get image axis extents
+ int nx = im->nx(), ny = im->ny();
+ double xmin=0, xmax=nx, ymin=0, ymax=ny; // default coordinate
+ if (! im->getAxisExtent (xmin, xmax, ymin, ymax)) {
+ sys_error(ERR_WARNING, "Axis extent not available [Scanner::projectSingleLine]");
+ }
+
+ // Clip line in image object coordinates
+ double rect[4];
+ rect[0] = xmin; rect[1] = ymin;
+ rect[2] = xmax; rect[3] = ymax;
+ bool accept = clip_rect (x1, y1, x2, y2, rect);
+ if (! accept)
+ return (0.0);
+
+ // Convert to pixel coordinates
+ double xlen = xmax - xmin;
+ double ylen = ymax - ymin;
+ double px1 = nx * (x1 - xmin) / xlen;
+ double px2 = nx * (x2 - xmin) / xlen;
+ double py1 = ny * (y1 - ymin) / ylen;
+ double py2 = ny * (y2 - ymin) / ylen;
+
+ std::vector<WeightedPoint> wp;
+ projection_pixel_weights (wp, nx, ny, px1, py1, px2, py2);
+ for (unsigned int i = 0; i < wp.size(); i++) {
+ WeightedPoint& p = wp[i];
+ rsum += v[p.x][p.y] * p.weight;
+ }
+ } else {
+
+ // Project through each pelem in Phantom
+ for (PElemConstIterator i = phm.listPElem().begin(); i != phm.listPElem().end(); i++)
+ rsum += projectLineAgainstPElem (**i, x1, y1, x2, y2);
+ }
return (rsum);
}
/* NAME
- * pelem_ray_attenuation Calculate raysum of an pelem along one line
- *
- * SYNOPSIS
- * rsum = pelem_ray_attenuation (pelem, x1, y1, x2, y2)
- * double rsum Computed raysum
- * PhantomElement& pelem Pelem to scan
- * double x1, y1, x2, y2 Endpoints of raysum line
- */
+* pelem_ray_attenuation Calculate raysum of an pelem along one line
+*
+* SYNOPSIS
+* rsum = pelem_ray_attenuation (pelem, x1, y1, x2, y2)
+* double rsum Computed raysum
+* PhantomElement& pelem Pelem to scan
+* double x1, y1, x2, y2 Endpoints of raysum line
+*/
-double
-Scanner::projectLineAgainstPElem (const PhantomElement& pelem, double x1, double y1, double x2, double y2, SGP* pSGP)
+double
+Scanner::projectLineAgainstPElem (const PhantomElement& pelem, double x1, double y1, double x2, double y2)
{
if (! pelem.clipLineWorldCoords (x1, y1, x2, y2)) {
- if (m_trace == TRACE_CLIPPING)
+ if (m_trace == Trace::TRACE_CLIPPING)
cio_tone (1000., 0.05);
return (0.0);
}
#ifdef HAVE_SGP
- if (pSGP && m_trace == TRACE_CLIPPING) {
- pSGP->moveAbs (x1, y1);
- pSGP->lineAbs (x2, y2);
+ if (m_pSGP && m_trace == Trace::TRACE_CLIPPING) {
+ m_pSGP->setRasterOp (RO_XOR);
+ m_pSGP->moveAbs (x1, y1);
+ m_pSGP->lineAbs (x2, y2);
cio_tone (8000., 0.05);
- pSGP->moveAbs (x1, y1);
- pSGP->lineAbs (x2, y2);
+ m_pSGP->moveAbs (x1, y1);
+ m_pSGP->lineAbs (x2, y2);
+ m_pSGP->setRasterOp (RO_SET);
}
#endif
projects / ctsim.git / blobdiff