diff options
Diffstat (limited to 'include/astra/ParallelBeamLinearKernelProjector2D.inl')
| -rw-r--r-- | include/astra/ParallelBeamLinearKernelProjector2D.inl | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/include/astra/ParallelBeamLinearKernelProjector2D.inl b/include/astra/ParallelBeamLinearKernelProjector2D.inl index 10d4892..53451e5 100644 --- a/include/astra/ParallelBeamLinearKernelProjector2D.inl +++ b/include/astra/ParallelBeamLinearKernelProjector2D.inl @@ -154,18 +154,7 @@ void CParallelBeamLinearKernelProjector2D::projectBlock_internal(int _iProjFrom, const SParProjection * proj = &pVecProjectionGeometry->getProjectionVectors()[iAngle]; - float32 detSize = sqrt(proj->fDetUX * proj->fDetUX + proj->fDetUY * proj->fDetUY); - const bool vertical = fabs(proj->fRayX) < fabs(proj->fRayY); - if (vertical) { - RxOverRy = proj->fRayX/proj->fRayY; - lengthPerRow = detSize * m_pVolumeGeometry->getPixelLengthX() * sqrt(proj->fRayY*proj->fRayY + proj->fRayX*proj->fRayX) / abs(proj->fRayY); - deltac = -pixelLengthY * RxOverRy * inv_pixelLengthX; - } else { - RyOverRx = proj->fRayY/proj->fRayX; - lengthPerCol = detSize * m_pVolumeGeometry->getPixelLengthY() * sqrt(proj->fRayY*proj->fRayY + proj->fRayX*proj->fRayX) / abs(proj->fRayX); - deltar = -pixelLengthX * RyOverRx * inv_pixelLengthY; - } Ex = m_pVolumeGeometry->getWindowMinX() + pixelLengthX*0.5f; Ey = m_pVolumeGeometry->getWindowMaxY() - pixelLengthY*0.5f; @@ -186,6 +175,10 @@ void CParallelBeamLinearKernelProjector2D::projectBlock_internal(int _iProjFrom, // vertically if (vertical) { + RxOverRy = proj->fRayX/proj->fRayY; + lengthPerRow = m_pVolumeGeometry->getPixelLengthX() * sqrt(proj->fRayY*proj->fRayY + proj->fRayX*proj->fRayX) / abs(proj->fRayY); + deltac = -pixelLengthY * RxOverRy * inv_pixelLengthX; + // calculate c for row 0 c = (Dx + (Ey - Dy)*RxOverRy - Ex) * inv_pixelLengthX; @@ -209,6 +202,10 @@ void CParallelBeamLinearKernelProjector2D::projectBlock_internal(int _iProjFrom, // horizontally else { + RyOverRx = proj->fRayY/proj->fRayX; + lengthPerCol = m_pVolumeGeometry->getPixelLengthY() * sqrt(proj->fRayY*proj->fRayY + proj->fRayX*proj->fRayX) / abs(proj->fRayX); + deltar = -pixelLengthX * RyOverRx * inv_pixelLengthY; + // calculate r for col 0 r = -(Dy + (Ex - Dx)*RyOverRx - Ey) * inv_pixelLengthY; |