diff options
Diffstat (limited to 'src/ConeProjectionGeometry3D.cpp')
| -rw-r--r-- | src/ConeProjectionGeometry3D.cpp | 92 |
1 files changed, 86 insertions, 6 deletions
diff --git a/src/ConeProjectionGeometry3D.cpp b/src/ConeProjectionGeometry3D.cpp index dd22eba..18f0f8a 100644 --- a/src/ConeProjectionGeometry3D.cpp +++ b/src/ConeProjectionGeometry3D.cpp @@ -29,6 +29,7 @@ $Id$ #include "astra/ConeProjectionGeometry3D.h" #include "astra/Logging.h" +#include "astra/GeometryUtil3D.h" #include <boost/lexical_cast.hpp> #include <cstring> @@ -230,14 +231,14 @@ CVector3D CConeProjectionGeometry3D::getProjectionDirection(int _iProjectionInde return ret; } -void CConeProjectionGeometry3D::projectPoint(float32 fX, float32 fY, float32 fZ, - int iAngleIndex, - float32 &fU, float32 &fV) const +void CConeProjectionGeometry3D::projectPoint(double fX, double fY, double fZ, + int iAngleIndex, + double &fU, double &fV) const { ASTRA_ASSERT(iAngleIndex >= 0); ASTRA_ASSERT(iAngleIndex < m_iProjectionAngleCount); - float alpha = m_pfProjectionAngles[iAngleIndex]; + double alpha = m_pfProjectionAngles[iAngleIndex]; // Project point onto optical axis @@ -245,14 +246,14 @@ void CConeProjectionGeometry3D::projectPoint(float32 fX, float32 fY, float32 fZ, // Vector source->origin is (-sin(alpha), cos(alpha)) // Distance from source, projected on optical axis - float fD = -sin(alpha) * fX + cos(alpha) * fY + m_fOriginSourceDistance; + double fD = -sin(alpha) * fX + cos(alpha) * fY + m_fOriginSourceDistance; // Scale fZ to detector plane fV = detectorOffsetYToRowIndexFloat( (fZ * (m_fOriginSourceDistance + m_fOriginDetectorDistance)) / fD ); // Orthogonal distance in XY-plane to optical axis - float fS = cos(alpha) * fX + sin(alpha) * fY; + double fS = cos(alpha) * fX + sin(alpha) * fY; // Scale fS to detector plane fU = detectorOffsetXToColIndexFloat( (fS * (m_fOriginSourceDistance + m_fOriginDetectorDistance)) / fD ); @@ -261,5 +262,84 @@ void CConeProjectionGeometry3D::projectPoint(float32 fX, float32 fY, float32 fZ, } +void CConeProjectionGeometry3D::backprojectPointX(int iAngleIndex, double fU, double fV, + double fX, double &fY, double &fZ) const +{ + ASTRA_ASSERT(iAngleIndex >= 0); + ASTRA_ASSERT(iAngleIndex < m_iProjectionAngleCount); + + SConeProjection *projs = genConeProjections(1, m_iDetectorColCount, m_iDetectorRowCount, + m_fOriginSourceDistance, + m_fOriginDetectorDistance, + m_fDetectorSpacingX, m_fDetectorSpacingY, + &m_pfProjectionAngles[iAngleIndex]); + + SConeProjection &proj = projs[0]; + + double px = proj.fDetSX + fU * proj.fDetUX + fV * proj.fDetVX; + double py = proj.fDetSY + fU * proj.fDetUY + fV * proj.fDetVY; + double pz = proj.fDetSZ + fU * proj.fDetUZ + fV * proj.fDetVZ; + + double a = (fX - proj.fSrcX) / (px - proj.fSrcX); + + fY = proj.fSrcY + a * (py - proj.fSrcY); + fZ = proj.fSrcZ + a * (pz - proj.fSrcZ); + + delete[] projs; +} + +void CConeProjectionGeometry3D::backprojectPointY(int iAngleIndex, double fU, double fV, + double fY, double &fX, double &fZ) const +{ + ASTRA_ASSERT(iAngleIndex >= 0); + ASTRA_ASSERT(iAngleIndex < m_iProjectionAngleCount); + + SConeProjection *projs = genConeProjections(1, m_iDetectorColCount, m_iDetectorRowCount, + m_fOriginSourceDistance, + m_fOriginDetectorDistance, + m_fDetectorSpacingX, m_fDetectorSpacingY, + &m_pfProjectionAngles[iAngleIndex]); + + SConeProjection &proj = projs[0]; + + double px = proj.fDetSX + fU * proj.fDetUX + fV * proj.fDetVX; + double py = proj.fDetSY + fU * proj.fDetUY + fV * proj.fDetVY; + double pz = proj.fDetSZ + fU * proj.fDetUZ + fV * proj.fDetVZ; + + double a = (fY - proj.fSrcY) / (py - proj.fSrcY); + + fX = proj.fSrcX + a * (px - proj.fSrcX); + fZ = proj.fSrcZ + a * (pz - proj.fSrcZ); + + delete[] projs; +} + +void CConeProjectionGeometry3D::backprojectPointZ(int iAngleIndex, double fU, double fV, + double fZ, double &fX, double &fY) const +{ + ASTRA_ASSERT(iAngleIndex >= 0); + ASTRA_ASSERT(iAngleIndex < m_iProjectionAngleCount); + + SConeProjection *projs = genConeProjections(1, m_iDetectorColCount, m_iDetectorRowCount, + m_fOriginSourceDistance, + m_fOriginDetectorDistance, + m_fDetectorSpacingX, m_fDetectorSpacingY, + &m_pfProjectionAngles[iAngleIndex]); + + SConeProjection &proj = projs[0]; + + double px = proj.fDetSX + fU * proj.fDetUX + fV * proj.fDetVX; + double py = proj.fDetSY + fU * proj.fDetUY + fV * proj.fDetVY; + double pz = proj.fDetSZ + fU * proj.fDetUZ + fV * proj.fDetVZ; + + double a = (fZ - proj.fSrcZ) / (pz - proj.fSrcZ); + + fX = proj.fSrcX + a * (px - proj.fSrcX); + fY = proj.fSrcY + a * (py - proj.fSrcY); + + delete[] projs; +} + + } // end namespace astra |