diff options
Diffstat (limited to 'src/ParallelBeamLinearKernelProjector2D.cpp')
-rw-r--r-- | src/ParallelBeamLinearKernelProjector2D.cpp | 61 |
1 files changed, 0 insertions, 61 deletions
diff --git a/src/ParallelBeamLinearKernelProjector2D.cpp b/src/ParallelBeamLinearKernelProjector2D.cpp index 5ca1082..120b1a2 100644 --- a/src/ParallelBeamLinearKernelProjector2D.cpp +++ b/src/ParallelBeamLinearKernelProjector2D.cpp @@ -158,64 +158,3 @@ void CParallelBeamLinearKernelProjector2D::computeSingleRayWeights(int _iProject projectSingleRay(_iProjectionIndex, _iDetectorIndex, p); _iStoredPixelCount = p.getStoredPixelCount(); } - -//---------------------------------------------------------------------------------------- -// Splat a single point -std::vector<SDetector2D> CParallelBeamLinearKernelProjector2D::projectPoint(int _iRow, int _iCol) -{ - float32 xUL = m_pVolumeGeometry->pixelColToCenterX(_iCol) - m_pVolumeGeometry->getPixelLengthX() * 1.5f; - float32 yUL = m_pVolumeGeometry->pixelRowToCenterY(_iRow) - m_pVolumeGeometry->getPixelLengthY() * 1.5f; - float32 xUR = m_pVolumeGeometry->pixelColToCenterX(_iCol) + m_pVolumeGeometry->getPixelLengthX() * 1.5f; - float32 yUR = m_pVolumeGeometry->pixelRowToCenterY(_iRow) - m_pVolumeGeometry->getPixelLengthY() * 1.5f; - float32 xLL = m_pVolumeGeometry->pixelColToCenterX(_iCol) - m_pVolumeGeometry->getPixelLengthX() * 1.5f; - float32 yLL = m_pVolumeGeometry->pixelRowToCenterY(_iRow) + m_pVolumeGeometry->getPixelLengthY() * 1.5f; - float32 xLR = m_pVolumeGeometry->pixelColToCenterX(_iCol) + m_pVolumeGeometry->getPixelLengthX() * 1.5f; - float32 yLR = m_pVolumeGeometry->pixelRowToCenterY(_iRow) + m_pVolumeGeometry->getPixelLengthY() * 1.5f; - - std::vector<SDetector2D> res; - // loop projectors and detectors - for (int iProjection = 0; iProjection < m_pProjectionGeometry->getProjectionAngleCount(); ++iProjection) { - - // get projection angle - float32 theta = m_pProjectionGeometry->getProjectionAngle(iProjection); - if (theta >= 7*PIdiv4) theta -= 2*PI; - bool inverse = false; - if (theta >= 3*PIdiv4) { - theta -= PI; - inverse = true; - } - - // calculate distance from the center of the voxel to the ray though the origin - float32 tUL = xUL * cos(theta) + yUL * sin(theta); - float32 tUR = xUR * cos(theta) + yUR * sin(theta); - float32 tLL = xLL * cos(theta) + yLL * sin(theta); - float32 tLR = xLR * cos(theta) + yLR * sin(theta); - if (inverse) { - tUL *= -1.0f; - tUR *= -1.0f; - tLL *= -1.0f; - tLR *= -1.0f; - } - float32 tMin = min(tUL, min(tUR, min(tLL,tLR))); - float32 tMax = max(tUL, max(tUR, max(tLL,tLR))); - - // calculate the offset on the detectorarray (in indices) - int dmin = (int)floor(m_pProjectionGeometry->detectorOffsetToIndexFloat(tMin)); - int dmax = (int)ceil(m_pProjectionGeometry->detectorOffsetToIndexFloat(tMax)); - - // add affected detectors to the list - for (int i = dmin; i <= dmax; ++i) { - if (i >= 0 && i < m_pProjectionGeometry->getDetectorCount()) { - SDetector2D det; - det.m_iAngleIndex = iProjection; - det.m_iDetectorIndex = i; - det.m_iIndex = iProjection * getProjectionGeometry()->getDetectorCount() + i; - res.push_back(det); - } - } - } - - // return result vector - return res; - -} |