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-rw-r--r--include/astra/ParallelBeamLinearKernelProjector2D.inl280
1 files changed, 24 insertions, 256 deletions
diff --git a/include/astra/ParallelBeamLinearKernelProjector2D.inl b/include/astra/ParallelBeamLinearKernelProjector2D.inl
index 66b1cb2..d545f30 100644
--- a/include/astra/ParallelBeamLinearKernelProjector2D.inl
+++ b/include/astra/ParallelBeamLinearKernelProjector2D.inl
@@ -27,11 +27,31 @@ $Id$
*/
+template <typename Policy>
+void CParallelBeamLinearKernelProjector2D::project(Policy& p)
+{
+ projectBlock_internal(0, m_pProjectionGeometry->getProjectionAngleCount(),
+ 0, m_pProjectionGeometry->getDetectorCount(), p);
+}
+
+template <typename Policy>
+void CParallelBeamLinearKernelProjector2D::projectSingleProjection(int _iProjection, Policy& p)
+{
+ projectBlock_internal(_iProjection, _iProjection + 1,
+ 0, m_pProjectionGeometry->getDetectorCount(), p);
+}
+
+template <typename Policy>
+void CParallelBeamLinearKernelProjector2D::projectSingleRay(int _iProjection, int _iDetector, Policy& p)
+{
+ projectBlock_internal(_iProjection, _iProjection + 1,
+ _iDetector, _iDetector + 1, p);
+}
//----------------------------------------------------------------------------------------
-// PROJECT ALL
+// PROJECT BLOCK
template <typename Policy>
-void CParallelBeamLinearKernelProjector2D::project(Policy& p)
+void CParallelBeamLinearKernelProjector2D::projectBlock_internal(int _iProjFrom, int _iProjTo, int _iDetFrom, int _iDetTo, Policy& p)
{
// variables
float32 theta, sin_theta, cos_theta, inv_sin_theta, inv_cos_theta, t;
@@ -43,7 +63,7 @@ void CParallelBeamLinearKernelProjector2D::project(Policy& p)
float32 P,x,x2;
// loop angles
- for (iAngle = 0; iAngle < m_pProjectionGeometry->getProjectionAngleCount(); ++iAngle) {
+ for (iAngle = _iProjFrom; iAngle < _iProjTo; ++iAngle) {
// get theta
theta = m_pProjectionGeometry->getProjectionAngle(iAngle);
@@ -71,7 +91,7 @@ void CParallelBeamLinearKernelProjector2D::project(Policy& p)
inv_pixelLengthY = 1.0f / m_pVolumeGeometry->getPixelLengthY();
// loop detectors
- for (iDetector = 0; iDetector < m_pProjectionGeometry->getDetectorCount(); ++iDetector) {
+ for (iDetector = _iDetFrom; iDetector < _iDetTo; ++iDetector) {
iRayIndex = iAngle * m_pProjectionGeometry->getDetectorCount() + iDetector;
@@ -162,255 +182,3 @@ void CParallelBeamLinearKernelProjector2D::project(Policy& p)
}
-
-//----------------------------------------------------------------------------------------
-// PROJECT SINGLE PROJECTION
-template <typename Policy>
-void CParallelBeamLinearKernelProjector2D::projectSingleProjection(int _iProjection, Policy& p)
-{
- // variables
- float32 theta, sin_theta, cos_theta, inv_sin_theta, inv_cos_theta, t;
- float32 lengthPerRow, updatePerRow, inv_pixelLengthX;
- float32 lengthPerCol, updatePerCol, inv_pixelLengthY;
- bool switch_t;
- int iDetector, iVolumeIndex, iRayIndex;
- int row, col, x1;
- float32 P,x,x2;
-
- // get theta
- theta = m_pProjectionGeometry->getProjectionAngle(_iProjection);
- switch_t = false;
- if (theta >= 7*PIdiv4) theta -= 2*PI;
- if (theta >= 3*PIdiv4) {
- theta -= PI;
- switch_t = true;
- }
-
- // precalculate sin, cos, 1/cos
- sin_theta = sin(theta);
- cos_theta = cos(theta);
- inv_cos_theta = 1.0f / cos_theta;
- inv_sin_theta = 1.0f / sin_theta;
-
- // precalculate kernel limits
- lengthPerRow = m_pVolumeGeometry->getPixelLengthY() * inv_cos_theta;
- updatePerRow = sin_theta * inv_cos_theta;
- inv_pixelLengthX = 1.0f / m_pVolumeGeometry->getPixelLengthX();
-
- // precalculate kernel limits
- lengthPerCol = m_pVolumeGeometry->getPixelLengthX() * inv_sin_theta;
- updatePerCol = cos_theta * inv_sin_theta;
- inv_pixelLengthY = 1.0f / m_pVolumeGeometry->getPixelLengthY();
-
- // loop detectors
- for (iDetector = 0; iDetector < m_pProjectionGeometry->getDetectorCount(); ++iDetector) {
-
- iRayIndex = _iProjection * m_pProjectionGeometry->getDetectorCount() + iDetector;
-
- // POLICY: RAY PRIOR
- if (!p.rayPrior(iRayIndex)) continue;
-
- // get t
- t = m_pProjectionGeometry->indexToDetectorOffset(iDetector);
- if (switch_t) {
- t = -t;
- }
-
- // vertically
- if (theta <= PIdiv4) {
-
- // calculate x for row 0
- P = (t - sin_theta * m_pVolumeGeometry->pixelRowToCenterY(0)) * inv_cos_theta;
- x = m_pVolumeGeometry->coordXToColF(P) - 0.5f;
-
- // for each row
- for (row = 0; row < m_pVolumeGeometry->getGridRowCount(); ++row) {
-
- // get coords
- x1 = (int)((x > 0.0f) ? x : x-1.0f);
- x2 = x - x1;
- x += updatePerRow;
-
- // add weights
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, (1.0f - x2) * lengthPerRow);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- if (x1+1 >= 0 && x1+1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1+1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, (x2) * lengthPerRow);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
- }
-
- // horizontally
- else if (PIdiv4 <= theta && theta <= 3*PIdiv4) {
-
- // calculate point P
- P = (t - cos_theta * m_pVolumeGeometry->pixelColToCenterX(0)) * inv_sin_theta;
- x = m_pVolumeGeometry->coordYToRowF(P) - 0.5f;
-
- // for each row
- for (col = 0; col < m_pVolumeGeometry->getGridColCount(); ++col) {
-
- // get coords
- x1 = (int)((x > 0.0f) ? x : x-1.0f);
- x2 = x - x1;
- x += updatePerCol;
-
- // add weights
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridRowCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, (1.0f - x2) * lengthPerCol);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- if (x1+1 >= 0 && x1+1 < m_pVolumeGeometry->getGridRowCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1+1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, x2 * lengthPerCol);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
- }
-
- // POLICY: RAY POSTERIOR
- p.rayPosterior(iRayIndex);
-
- } // end loop detector
-}
-
-//----------------------------------------------------------------------------------------
-// PROJECT SINGLE RAY
-template <typename Policy>
-void CParallelBeamLinearKernelProjector2D::projectSingleRay(int _iProjection, int _iDetector, Policy& p)
-{
- int iVolumeIndex, iRayIndex;
-
- iRayIndex = _iProjection * m_pProjectionGeometry->getDetectorCount() + _iDetector;
-
- // POLICY: RAY PRIOR
- if (!p.rayPrior(iRayIndex)) return;
-
- // get theta
- float32 theta = m_pProjectionGeometry->getProjectionAngle(_iProjection);
- bool switch_t = false;
- if (theta >= 7*PIdiv4) theta -= 2*PI;
- if (theta >= 3*PIdiv4) {
- theta -= PI;
- switch_t = true;
- }
-
- // get t
- float32 t = m_pProjectionGeometry->indexToDetectorOffset(_iDetector);
- if (switch_t) {
- t = -t;
- }
-
- // vertically
- if (theta <= PIdiv4) {
-
- // precalculate sin, 1/cos
- float32 sin_theta = sin(theta);
- float32 inv_cos_theta = 1.0f / cos(theta);
-
- // precalculate kernel limits
- float32 lengthPerRow = m_pVolumeGeometry->getPixelLengthY() * inv_cos_theta;
- float32 updatePerRow = sin_theta * inv_cos_theta;
-
- int row, x1;
- float32 P,x,x2;
-
- // calculate x for row 0
- P = (t - sin_theta * m_pVolumeGeometry->pixelRowToCenterY(0)) * inv_cos_theta;
- x = m_pVolumeGeometry->coordXToColF(P) - 0.5f;
-
- // for each row
- for (row = 0; row < m_pVolumeGeometry->getGridRowCount(); ++row) {
-
- // get coords
- x1 = (int)((x > 0.0f) ? x : x-1.0f);
- x2 = x - x1;
- x += updatePerRow;
-
- // add weights
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, (1.0f - x2) * lengthPerRow);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- if (x1+1 >= 0 && x1+1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1+1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, (x2) * lengthPerRow);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
- }
-
- // horizontally
- else if (PIdiv4 <= theta && theta <= 3*PIdiv4) {
-
- // precalculate cos 1/sin
- float32 cos_theta = cos(theta);
- float32 inv_sin_theta = 1.0f / sin(theta);
-
- // precalculate kernel limits
- float32 lengthPerCol = m_pVolumeGeometry->getPixelLengthX() * inv_sin_theta;
- float32 updatePerCol = cos_theta * inv_sin_theta;
-
- int col, x1;
- float32 P,x,x2;
-
- // calculate point P
- P = (t - cos_theta * m_pVolumeGeometry->pixelColToCenterX(0)) * inv_sin_theta;
- x = m_pVolumeGeometry->coordYToRowF(P) - 0.5f;
-
- // for each row
- for (col = 0; col < m_pVolumeGeometry->getGridColCount(); ++col) {
-
- // get coords
- x1 = (int)((x > 0.0f) ? x : x-1.0f);
- x2 = x - x1;
- x += updatePerCol;
-
- // add weights
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridRowCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, (1.0f - x2) * lengthPerCol);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- if (x1+1 >= 0 && x1+1 < m_pVolumeGeometry->getGridRowCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1+1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, x2 * lengthPerCol);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
- }
-
- // POLICY: RAY POSTERIOR
- p.rayPosterior(iRayIndex);
-}
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