diff options
Diffstat (limited to 'src/ConeVecProjectionGeometry3D.cpp')
| -rw-r--r-- | src/ConeVecProjectionGeometry3D.cpp | 58 |
1 files changed, 56 insertions, 2 deletions
diff --git a/src/ConeVecProjectionGeometry3D.cpp b/src/ConeVecProjectionGeometry3D.cpp index 47ed630..86e3bd6 100644 --- a/src/ConeVecProjectionGeometry3D.cpp +++ b/src/ConeVecProjectionGeometry3D.cpp @@ -241,9 +241,9 @@ CVector3D CConeVecProjectionGeometry3D::getProjectionDirection(int _iProjectionI return CVector3D(p.fDetSX + (u+0.5)*p.fDetUX + (v+0.5)*p.fDetVX - p.fSrcX, p.fDetSY + (u+0.5)*p.fDetUY + (v+0.5)*p.fDetVY - p.fSrcY, p.fDetSZ + (u+0.5)*p.fDetUZ + (v+0.5)*p.fDetVZ - p.fSrcZ); } -void CConeVecProjectionGeometry3D::projectPoint(float32 fX, float32 fY, float32 fZ, +void CConeVecProjectionGeometry3D::projectPoint(double fX, double fY, double fZ, int iAngleIndex, - float32 &fU, float32 &fV) const + double &fU, double &fV) const { ASTRA_ASSERT(iAngleIndex >= 0); ASTRA_ASSERT(iAngleIndex < m_iProjectionAngleCount); @@ -262,6 +262,60 @@ void CConeVecProjectionGeometry3D::projectPoint(float32 fX, float32 fY, float32 } +void CConeVecProjectionGeometry3D::backprojectPointX(int iAngleIndex, double fU, double fV, + double fX, double &fY, double &fZ) const +{ + ASTRA_ASSERT(iAngleIndex >= 0); + ASTRA_ASSERT(iAngleIndex < m_iProjectionAngleCount); + + SConeProjection &proj = m_pProjectionAngles[iAngleIndex]; + + 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); +} + +void CConeVecProjectionGeometry3D::backprojectPointY(int iAngleIndex, double fU, double fV, + double fY, double &fX, double &fZ) const +{ + ASTRA_ASSERT(iAngleIndex >= 0); + ASTRA_ASSERT(iAngleIndex < m_iProjectionAngleCount); + + SConeProjection &proj = m_pProjectionAngles[iAngleIndex]; + + 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); +} + +void CConeVecProjectionGeometry3D::backprojectPointZ(int iAngleIndex, double fU, double fV, + double fZ, double &fX, double &fY) const +{ + ASTRA_ASSERT(iAngleIndex >= 0); + ASTRA_ASSERT(iAngleIndex < m_iProjectionAngleCount); + + SConeProjection &proj = m_pProjectionAngles[iAngleIndex]; + + 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); +} + //---------------------------------------------------------------------------------------- bool CConeVecProjectionGeometry3D::_check() |