From 2c1999b1bbfb7ef2ca1ae22b43e2a0ab8108073f Mon Sep 17 00:00:00 2001 From: Wim van Aarle Date: Thu, 12 Mar 2015 11:40:56 +0100 Subject: parallel projectors now always use vector geometries internally --- .../astra/ParallelBeamStripKernelProjector2D.inl | 343 +++------------------ 1 file changed, 45 insertions(+), 298 deletions(-) (limited to 'include/astra/ParallelBeamStripKernelProjector2D.inl') diff --git a/include/astra/ParallelBeamStripKernelProjector2D.inl b/include/astra/ParallelBeamStripKernelProjector2D.inl index 684408b..31d222a 100644 --- a/include/astra/ParallelBeamStripKernelProjector2D.inl +++ b/include/astra/ParallelBeamStripKernelProjector2D.inl @@ -29,305 +29,51 @@ $Id$ template void CParallelBeamStripKernelProjector2D::project(Policy& p) { - if (dynamic_cast(m_pProjectionGeometry)) { - projectBlock_internal(0, m_pProjectionGeometry->getProjectionAngleCount(), - 0, m_pProjectionGeometry->getDetectorCount(), p); - } else if (dynamic_cast(m_pProjectionGeometry)) { - projectBlock_internal_vector(0, m_pProjectionGeometry->getProjectionAngleCount(), - 0, m_pProjectionGeometry->getDetectorCount(), p); - } + projectBlock_internal(0, m_pProjectionGeometry->getProjectionAngleCount(), + 0, m_pProjectionGeometry->getDetectorCount(), p); } template void CParallelBeamStripKernelProjector2D::projectSingleProjection(int _iProjection, Policy& p) { - if (dynamic_cast(m_pProjectionGeometry)) { - projectBlock_internal(_iProjection, _iProjection + 1, - 0, m_pProjectionGeometry->getDetectorCount(), p); - } else if (dynamic_cast(m_pProjectionGeometry)) { - projectBlock_internal_vector(_iProjection, _iProjection + 1, - 0, m_pProjectionGeometry->getDetectorCount(), p); - } + projectBlock_internal(_iProjection, _iProjection + 1, + 0, m_pProjectionGeometry->getDetectorCount(), p); } template void CParallelBeamStripKernelProjector2D::projectSingleRay(int _iProjection, int _iDetector, Policy& p) { - if (dynamic_cast(m_pProjectionGeometry)) { - projectBlock_internal(_iProjection, _iProjection + 1, - _iDetector, _iDetector + 1, p); - } else if (dynamic_cast(m_pProjectionGeometry)) { - projectBlock_internal_vector(_iProjection, _iProjection + 1, + projectBlock_internal(_iProjection, _iProjection + 1, _iDetector, _iDetector + 1, p); - } } + //---------------------------------------------------------------------------------------- // PROJECT BLOCK template void CParallelBeamStripKernelProjector2D::projectBlock_internal(int _iProjFrom, int _iProjTo, int _iDetFrom, int _iDetTo, Policy& p) -{ - ASTRA_ASSERT(m_bIsInitialized); - - // Some variables - float32 theta, t; - int row, col; - int iAngle; - int iDetector; - float32 res; - float32 PL, PLimitL, PLimitR; - float32 xL, xR, XLimitL, XLimitR; - int x1L,x1R; - float32 x2L, x2R, updateX; - int iVolumeIndex, iRayIndex; - - float32 sin_theta, cos_theta, inv_sin_theta, inv_cos_theta; - float32 fabs_sin_theta, fabs_cos_theta, fabs_inv_sin_theta, fabs_inv_cos_theta; - float32 PW, PH, DW, inv_PW, inv_PH; - float32 S, T, U, V, inv_4T; - - // loop angles - for (iAngle = _iProjFrom; iAngle < _iProjTo; ++iAngle) { - - // get values - theta = m_pProjectionGeometry->getProjectionAngle(iAngle); - bool 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; - - fabs_sin_theta = (sin_theta < 0.0f) ? -sin_theta : sin_theta; - fabs_cos_theta = (cos_theta < 0.0f) ? -cos_theta : cos_theta; - fabs_inv_cos_theta = (inv_cos_theta < 0.0f) ? -inv_cos_theta : inv_cos_theta; - fabs_inv_sin_theta = (inv_sin_theta < 0.0f) ? -inv_sin_theta : inv_sin_theta; - - // Other precalculations - PW = m_pVolumeGeometry->getPixelLengthX(); - PH = m_pVolumeGeometry->getPixelLengthY(); - DW = m_pProjectionGeometry->getDetectorWidth(); - inv_PW = 1.0f / PW; - inv_PH = 1.0f / PH; - - // [-45?,45?] and [135?,225?] - if (theta < PIdiv4) { - - // Precalculate kernel limits - S = -0.5f * fabs_sin_theta * fabs_inv_cos_theta; - T = -S; - U = 1.0f + S; - V = 1.0f - S; - inv_4T = 0.25f / T; - - updateX = sin_theta * inv_cos_theta; - - // loop detectors - for (iDetector = _iDetFrom; iDetector < _iDetTo; ++iDetector) { - - iRayIndex = iAngle * m_pProjectionGeometry->getDetectorCount() + iDetector; - - // POLICY: RAY PRIOR - if (!p.rayPrior(iRayIndex)) continue; - - // get t - t = m_pProjectionGeometry->indexToDetectorOffset(iDetector); - if (switch_t) t = -t; - - // calculate left strip extremes (volume coordinates) - PL = (t - sin_theta * m_pVolumeGeometry->pixelRowToCenterY(0) - DW*0.5f) * inv_cos_theta; - PLimitL = PL - 0.5f * fabs_sin_theta * fabs_inv_cos_theta * PH; - PLimitR = PLimitL + DW * inv_cos_theta + PH * fabs_sin_theta * fabs_inv_cos_theta; - - // calculate strip extremes (pixel coordinates) - XLimitL = (PLimitL - m_pVolumeGeometry->getWindowMinX()) * inv_PW; - XLimitR = (PLimitR - m_pVolumeGeometry->getWindowMinX()) * inv_PW; - xL = (PL - m_pVolumeGeometry->getWindowMinX()) * inv_PW; - xR = xL + (DW * inv_cos_theta) * inv_PW; - - // for each row - for (row = 0; row < m_pVolumeGeometry->getGridRowCount(); ++row) { - - // get strip extremes in column indices - x1L = int((XLimitL > 0.0f) ? XLimitL : XLimitL-1.0f); - x1R = int((XLimitR > 0.0f) ? XLimitR : XLimitR-1.0f); - - // get coords w.r.t leftmost column hit by strip - x2L = xL - x1L; - x2R = xR - x1L; - - // update strip extremes for the next row - XLimitL += updateX; - XLimitR += updateX; - xL += updateX; - xR += updateX; - - // for each affected col - for (col = x1L; col <= x1R; ++col) { - - if (col < 0 || col >= m_pVolumeGeometry->getGridColCount()) { x2L -= 1.0f; x2R -= 1.0f; continue; } - - iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, col); - // POLICY: PIXEL PRIOR - if (!p.pixelPrior(iVolumeIndex)) { x2L -= 1.0f; x2R -= 1.0f; continue; } - - // right - if (x2R >= V) res = 1.0f; - else if (x2R > U) res = x2R - (x2R-U)*(x2R-U)*inv_4T; - else if (x2R >= T) res = x2R; - else if (x2R > S) res = (x2R-S)*(x2R-S) * inv_4T; - else { x2L -= 1.0f; x2R -= 1.0f; continue; } - - // left - if (x2L <= S) {} // - 0.0f - else if (x2L < T) res -= (x2L-S)*(x2L-S) * inv_4T; - else if (x2L <= U) res -= x2L; - else if (x2L < V) res -= x2L - (x2L-U)*(x2L-U)*inv_4T; - else { x2L -= 1.0f; x2R -= 1.0f; continue; } - - // POLICY: ADD - p.addWeight(iRayIndex, iVolumeIndex, PW*PH * res); - - // POLICY: PIXEL POSTERIOR - p.pixelPosterior(iVolumeIndex); - - x2L -= 1.0f; - x2R -= 1.0f; - - } // end col loop - - } // end row loop - - // POLICY: RAY POSTERIOR - p.rayPosterior(iRayIndex); - - } // end detector loop - - // [45?,135?] and [225?,315?] - // horizontaly - } else { - - // Precalculate kernel limits - S = -0.5f * fabs_cos_theta * fabs_inv_sin_theta; - T = -S; - U = 1.0f + S; - V = 1.0f - S; - inv_4T = 0.25f / T; - - updateX = cos_theta * inv_sin_theta; - - // loop detectors - for (iDetector = _iDetFrom; iDetector < _iDetTo; ++iDetector) { - - iRayIndex = iAngle * m_pProjectionGeometry->getDetectorCount() + iDetector; - - // POLICY: RAY PRIOR - if (!p.rayPrior(iRayIndex)) continue; - - // get t - t = m_pProjectionGeometry->indexToDetectorOffset(iDetector); - if (switch_t) t = -t; - - // calculate left strip extremes (volume coordinates) - PL = (t - cos_theta * m_pVolumeGeometry->pixelColToCenterX(0) + DW*0.5f) * inv_sin_theta; - PLimitL = PL + 0.5f * fabs_cos_theta * fabs_inv_sin_theta * PW; - PLimitR = PLimitL - DW * inv_sin_theta - PH * fabs_cos_theta * fabs_inv_sin_theta; - - // calculate strip extremes (pixel coordinates) - XLimitL = (m_pVolumeGeometry->getWindowMaxY() - PLimitL) * inv_PH; - XLimitR = (m_pVolumeGeometry->getWindowMaxY() - PLimitR) * inv_PH; - xL = (m_pVolumeGeometry->getWindowMaxY() - PL) * inv_PH; - xR = xL + (DW * fabs_inv_sin_theta) * inv_PH; - - // for each col - for (col = 0; col < m_pVolumeGeometry->getGridColCount(); ++col) { - - // get strip extremes in column indices - x1L = int((XLimitL > 0.0f) ? XLimitL : XLimitL-1.0f); - x1R = int((XLimitR > 0.0f) ? XLimitR : XLimitR-1.0f); - - // get coords w.r.t leftmost column hit by strip - x2L = xL - x1L; - x2R = xR - x1L; - - // update strip extremes for the next row - XLimitL += updateX; - XLimitR += updateX; - xL += updateX; - xR += updateX; - - // for each affected col - for (row = x1L; row <= x1R; ++row) { - - if (row < 0 || row >= m_pVolumeGeometry->getGridRowCount()) { x2L -= 1.0f; x2R -= 1.0f; continue; } - - iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, col); - - // POLICY: PIXEL PRIOR - if (!p.pixelPrior(iVolumeIndex)) { x2L -= 1.0f; x2R -= 1.0f; continue; } - - // right - if (x2R >= V) res = 1.0f; - else if (x2R > U) res = x2R - (x2R-U)*(x2R-U)*inv_4T; - else if (x2R >= T) res = x2R; - else if (x2R > S) res = (x2R-S)*(x2R-S) * inv_4T; - else { x2L -= 1.0f; x2R -= 1.0f; continue; } - - // left - if (x2L <= S) {} // - 0.0f - else if (x2L < T) res -= (x2L-S)*(x2L-S) * inv_4T; - else if (x2L <= U) res -= x2L; - else if (x2L < V) res -= x2L - (x2L-U)*(x2L-U)*inv_4T; - else { x2L -= 1.0f; x2R -= 1.0f; continue; } - - // POLICY: ADD - p.addWeight(iRayIndex, iVolumeIndex, PW*PH * res); - - // POLICY: PIXEL POSTERIOR - p.pixelPosterior(iVolumeIndex); - - x2L -= 1.0f; - x2R -= 1.0f; - - } // end row loop - - } // end col loop - - // POLICY: RAY POSTERIOR - p.rayPosterior(iRayIndex); - - } // end detector loop - - - } // end theta switch - - } // end angle loop -} - -//---------------------------------------------------------------------------------------- -// PROJECT BLOCK - vector projection geometry -template -void CParallelBeamStripKernelProjector2D::projectBlock_internal_vector(int _iProjFrom, int _iProjTo, int _iDetFrom, int _iDetTo, Policy& p) { // variables - float32 detX, detY, detLX, detLY, detRX, detRY, S, T, update_c, update_r, offsetL, offsetR, invTminS; - float32 lengthPerRow, lengthPerCol, inv_pixelLengthX, inv_pixelLengthY, pixelArea; - int iVolumeIndex, iRayIndex, iRayIndexL, iRayIndexR, row, row_top, row_bottom, col, col_left, col_right, iAngle, iDetector, colCount, rowCount; - + float32 detLX, detLY, detRX, detRY, S, T, update_c, update_r, offsetL, offsetR, invTminS; + float32 inv_pixelLengthX, inv_pixelLengthY, pixelArea, res, fRxOverRy, fRyOverRx; + int iVolumeIndex, iRayIndex, iAngle, iDetector; + int row, row_top, row_bottom, col, col_left, col_right, colCount, rowCount, detCount; const SParProjection * proj = 0; - const CParallelVecProjectionGeometry2D* pVecProjectionGeometry = dynamic_cast(m_pProjectionGeometry); + + // get vector geometry + const CParallelVecProjectionGeometry2D* pVecProjectionGeometry; + if (dynamic_cast(m_pProjectionGeometry)) { + pVecProjectionGeometry = dynamic_cast(m_pProjectionGeometry)->toVectorGeometry(); + } else { + pVecProjectionGeometry = dynamic_cast(m_pProjectionGeometry); + } + // precomputations inv_pixelLengthX = 1.0f / m_pVolumeGeometry->getPixelLengthX(); inv_pixelLengthY = 1.0f / m_pVolumeGeometry->getPixelLengthY(); pixelArea = m_pVolumeGeometry->getPixelLengthX() * m_pVolumeGeometry->getPixelLengthY(); - colCount = m_pVolumeGeometry->getGridColCount(); rowCount = m_pVolumeGeometry->getGridRowCount(); + detCount = pVecProjectionGeometry->getDetectorCount(); // loop angles for (iAngle = _iProjFrom; iAngle < _iProjTo; ++iAngle) { @@ -336,27 +82,29 @@ void CParallelBeamStripKernelProjector2D::projectBlock_internal_vector(int _iPro bool vertical = fabs(proj->fRayX) < fabs(proj->fRayY); if (vertical) { - S = 0.5f - 0.5f*fabs(proj->fRayX/proj->fRayY); - T = 0.5f + 0.5f*fabs(proj->fRayX/proj->fRayY); - update_c = -m_pVolumeGeometry->getPixelLengthY() * (proj->fRayX/proj->fRayY) * inv_pixelLengthX; + fRxOverRy = proj->fRayX/proj->fRayY; + update_c = -m_pVolumeGeometry->getPixelLengthY() * fRxOverRy * inv_pixelLengthX; + S = 0.5f - 0.5f*fabs(fRxOverRy); + T = 0.5f + 0.5f*fabs(fRxOverRy); invTminS = 1.0f / (T-S); } else { - S = 0.5f - 0.5f*fabs(proj->fRayY/proj->fRayX); - T = 0.5f + 0.5f*fabs(proj->fRayY/proj->fRayX); - update_r = -m_pVolumeGeometry->getPixelLengthX() * (proj->fRayY/proj->fRayX) * inv_pixelLengthY; + fRyOverRx = proj->fRayY/proj->fRayX; + update_r = -m_pVolumeGeometry->getPixelLengthX() * fRyOverRx * inv_pixelLengthY; + S = 0.5f - 0.5f*fabs(fRyOverRx); + T = 0.5f + 0.5f*fabs(fRyOverRx); invTminS = 1.0f / (T-S); } // loop detectors for (iDetector = _iDetFrom; iDetector < _iDetTo; ++iDetector) { - iRayIndex = iAngle * m_pProjectionGeometry->getDetectorCount() + iDetector; + iRayIndex = iAngle * detCount + iDetector; // POLICY: RAY PRIOR if (!p.rayPrior(iRayIndex)) continue; - detLX = proj->fDetSX + (iDetector+0.0f) * proj->fDetUX; - detLY = proj->fDetSY + (iDetector+0.0f) * proj->fDetUY; + detLX = proj->fDetSX + iDetector * proj->fDetUX; + detLY = proj->fDetSY + iDetector * proj->fDetUY; detRX = detLX + proj->fDetUX; detRY = detLY + proj->fDetUY; @@ -364,9 +112,9 @@ void CParallelBeamStripKernelProjector2D::projectBlock_internal_vector(int _iPro if (vertical) { // calculate cL and cR for row 0 - float32 xL = detLX + (proj->fRayX/proj->fRayY)*(m_pVolumeGeometry->pixelRowToCenterY(0)-detLY); + float32 xL = detLX + fRxOverRy*(m_pVolumeGeometry->pixelRowToCenterY(0)-detLY); float32 cL = (xL - m_pVolumeGeometry->getWindowMinX()) * inv_pixelLengthX - 0.5f; - float32 xR = detRX + (proj->fRayX/proj->fRayY)*(m_pVolumeGeometry->pixelRowToCenterY(0)-detRY); + float32 xR = detRX + fRxOverRy*(m_pVolumeGeometry->pixelRowToCenterY(0)-detRY); float32 cR = (xR - m_pVolumeGeometry->getWindowMinX()) * inv_pixelLengthX - 0.5f; if (cR < cL) { @@ -384,23 +132,23 @@ void CParallelBeamStripKernelProjector2D::projectBlock_internal_vector(int _iPro if (col_left < 0) col_left = 0; if (col_right > colCount-1) col_right = colCount-1; + offsetL = cL - float32(col_left); + offsetR = cR - float32(col_left); + // for each column - for (col = col_left; col <= col_right; ++col) { + for (col = col_left; col <= col_right; ++col, offsetL -= 1.0f, offsetR -= 1.0f) { iVolumeIndex = row * colCount + col; // POLICY: PIXEL PRIOR + ADD + POSTERIOR if (p.pixelPrior(iVolumeIndex)) { - offsetL = cL - float32(col); - offsetR = cR - float32(col); - // right ray edge - float32 res = 0.0f; if (T <= offsetR) res = 1.0f; else if (S < offsetR) res = 1.0f - 0.5f*(T-offsetR)*(T-offsetR)*invTminS; else if (-S < offsetR) res = 0.5f + offsetR; else if (-T < offsetR) res = 0.5f*(offsetR+T)*(offsetR+T)*invTminS; + else res = 0.0f; // left ray edge if (T <= offsetL) res -= 1.0f; @@ -408,7 +156,6 @@ void CParallelBeamStripKernelProjector2D::projectBlock_internal_vector(int _iPro else if (-S < offsetL) res -= 0.5f + offsetL; else if (-T < offsetL) res -= 0.5f*(offsetL+T)*(offsetL+T)*invTminS; - p.addWeight(iRayIndex, iVolumeIndex, pixelArea*res); p.pixelPosterior(iVolumeIndex); } @@ -420,9 +167,9 @@ void CParallelBeamStripKernelProjector2D::projectBlock_internal_vector(int _iPro else { // calculate rL and rR for row 0 - float32 yL = detLY + (proj->fRayY/proj->fRayX)*(m_pVolumeGeometry->pixelColToCenterX(0)-detLX); + float32 yL = detLY + fRyOverRx*(m_pVolumeGeometry->pixelColToCenterX(0)-detLX); float32 rL = (m_pVolumeGeometry->getWindowMaxY() - yL) * inv_pixelLengthY - 0.5f; - float32 yR = detRY + (proj->fRayY/proj->fRayX)*(m_pVolumeGeometry->pixelColToCenterX(0)-detRX); + float32 yR = detRY + fRyOverRx*(m_pVolumeGeometry->pixelColToCenterX(0)-detRX); float32 rR = (m_pVolumeGeometry->getWindowMaxY() - yR) * inv_pixelLengthY - 0.5f; if (rR < rL) { @@ -440,23 +187,23 @@ void CParallelBeamStripKernelProjector2D::projectBlock_internal_vector(int _iPro if (row_top < 0) row_top = 0; if (row_bottom > rowCount-1) row_bottom = rowCount-1; + offsetL = rL - float32(row_top); + offsetR = rR - float32(row_top); + // for each row - for (row = row_top; row <= row_bottom; ++row) { + for (row = row_top; row <= row_bottom; ++row, offsetL -= 1.0f, offsetR -= 1.0f) { iVolumeIndex = row * colCount + col; // POLICY: PIXEL PRIOR + ADD + POSTERIOR if (p.pixelPrior(iVolumeIndex)) { - offsetL = rL - float32(row); - offsetR = rR - float32(row); - // right ray edge - float32 res = 0.0f; if (T <= offsetR) res = 1.0f; else if (S < offsetR) res = 1.0f - 0.5f*(T-offsetR)*(T-offsetR)*invTminS; else if (-S < offsetR) res = 0.5f + offsetR; else if (-T < offsetR) res = 0.5f*(offsetR+T)*(offsetR+T)*invTminS; + else res = 0.0f; // left ray edge if (T <= offsetL) res -= 1.0f; -- cgit v1.2.3