From b85245ff01ba2595b09f6bc606bb5676c129a499 Mon Sep 17 00:00:00 2001 From: Willem Jan Palenstijn Date: Mon, 20 Jun 2016 12:08:33 +0200 Subject: Improve volume block reduction The previous version would make the blocks too large due to inefficient computation of overlap. --- src/CompositeGeometryManager.cpp | 297 ++++++++++++++++++++++----------------- 1 file changed, 165 insertions(+), 132 deletions(-) (limited to 'src') diff --git a/src/CompositeGeometryManager.cpp b/src/CompositeGeometryManager.cpp index 084ba8c..eba6762 100644 --- a/src/CompositeGeometryManager.cpp +++ b/src/CompositeGeometryManager.cpp @@ -196,6 +196,69 @@ bool CCompositeGeometryManager::splitJobs(TJobSet &jobs, size_t maxSize, int div return true; } + +static std::pair reduceProjectionVertical(const CVolumeGeometry3D* pVolGeom, const CProjectionGeometry3D* pProjGeom) +{ + double vmin_g, vmax_g; + + // reduce self to only cover intersection with projection of VolumePart + // (Project corners of volume, take bounding box) + + for (int i = 0; i < pProjGeom->getProjectionCount(); ++i) { + + double vol_u[8]; + double vol_v[8]; + + double pixx = pVolGeom->getPixelLengthX(); + double pixy = pVolGeom->getPixelLengthY(); + double pixz = pVolGeom->getPixelLengthZ(); + + // TODO: Is 0.5 sufficient? + double xmin = pVolGeom->getWindowMinX() - 0.5 * pixx; + double xmax = pVolGeom->getWindowMaxX() + 0.5 * pixx; + double ymin = pVolGeom->getWindowMinY() - 0.5 * pixy; + double ymax = pVolGeom->getWindowMaxY() + 0.5 * pixy; + double zmin = pVolGeom->getWindowMinZ() - 0.5 * pixz; + double zmax = pVolGeom->getWindowMaxZ() + 0.5 * pixz; + + pProjGeom->projectPoint(xmin, ymin, zmin, i, vol_u[0], vol_v[0]); + pProjGeom->projectPoint(xmin, ymin, zmax, i, vol_u[1], vol_v[1]); + pProjGeom->projectPoint(xmin, ymax, zmin, i, vol_u[2], vol_v[2]); + pProjGeom->projectPoint(xmin, ymax, zmax, i, vol_u[3], vol_v[3]); + pProjGeom->projectPoint(xmax, ymin, zmin, i, vol_u[4], vol_v[4]); + pProjGeom->projectPoint(xmax, ymin, zmax, i, vol_u[5], vol_v[5]); + pProjGeom->projectPoint(xmax, ymax, zmin, i, vol_u[6], vol_v[6]); + pProjGeom->projectPoint(xmax, ymax, zmax, i, vol_u[7], vol_v[7]); + + double vmin = vol_v[0]; + double vmax = vol_v[0]; + + for (int j = 1; j < 8; ++j) { + if (vol_v[j] < vmin) + vmin = vol_v[j]; + if (vol_v[j] > vmax) + vmax = vol_v[j]; + } + + if (i == 0 || vmin < vmin_g) + vmin_g = vmin; + if (i == 0 || vmax > vmax_g) + vmax_g = vmax; + } + + if (vmin_g < -1.0) + vmin_g = -1.0; + if (vmax_g > pProjGeom->getDetectorRowCount()) + vmax_g = pProjGeom->getDetectorRowCount(); + + if (vmin_g >= vmax_g) + vmin_g = vmax_g = 0.0; + + return std::pair(vmin_g, vmax_g); + +} + + CCompositeGeometryManager::CPart::CPart(const CPart& other) { eType = other.eType; @@ -236,119 +299,135 @@ size_t CCompositeGeometryManager::CPart::getSize() } +static bool testVolumeRange(const std::pair& fullRange, + const CVolumeGeometry3D *pVolGeom, + const CProjectionGeometry3D *pProjGeom, + int zmin, int zmax) +{ + double pixz = pVolGeom->getPixelLengthZ(); + + CVolumeGeometry3D test(pVolGeom->getGridColCount(), + pVolGeom->getGridRowCount(), + zmax - zmin, + pVolGeom->getWindowMinX(), + pVolGeom->getWindowMinY(), + pVolGeom->getWindowMinZ() + zmin * pixz, + pVolGeom->getWindowMaxX(), + pVolGeom->getWindowMaxY(), + pVolGeom->getWindowMinZ() + zmax * pixz); + + + std::pair subRange = reduceProjectionVertical(&test, pProjGeom); + + // empty + if (subRange.first == subRange.second) + return true; + + // fully outside of fullRange + if (subRange.first >= fullRange.second || subRange.second <= fullRange.first) + return true; + + return false; +} + CCompositeGeometryManager::CPart* CCompositeGeometryManager::CVolumePart::reduce(const CPart *_other) { const CProjectionPart *other = dynamic_cast(_other); assert(other); - // TODO: Is 0.5 sufficient? - double umin = -0.5; - double umax = other->pGeom->getDetectorColCount() + 0.5; - double vmin = -0.5; - double vmax = other->pGeom->getDetectorRowCount() + 0.5; - - double uu[4]; - double vv[4]; - uu[0] = umin; vv[0] = vmin; - uu[1] = umin; vv[1] = vmax; - uu[2] = umax; vv[2] = vmin; - uu[3] = umax; vv[3] = vmax; - - double pixx = pGeom->getPixelLengthX(); - double pixy = pGeom->getPixelLengthY(); - double pixz = pGeom->getPixelLengthZ(); - double xmin = pGeom->getWindowMinX() - 0.5 * pixx; - double xmax = pGeom->getWindowMaxX() + 0.5 * pixx; - double ymin = pGeom->getWindowMinY() - 0.5 * pixy; - double ymax = pGeom->getWindowMaxY() + 0.5 * pixy; - - // NB: Flipped - double zmax = pGeom->getWindowMinZ() - 2.5 * pixz; - double zmin = pGeom->getWindowMaxZ() + 2.5 * pixz; - - // TODO: This isn't as tight as it could be. - // In particular it won't detect the detector being - // missed entirely on the u side. - - for (int i = 0; i < other->pGeom->getProjectionCount(); ++i) { - for (int j = 0; j < 4; ++j) { - double px, py, pz; - - other->pGeom->backprojectPointX(i, uu[j], vv[j], xmin, py, pz); - //ASTRA_DEBUG("%f %f (%f - %f)", py, pz, ymin, ymax); - if (pz < zmin) zmin = pz; - if (pz > zmax) zmax = pz; - other->pGeom->backprojectPointX(i, uu[j], vv[j], xmax, py, pz); - //ASTRA_DEBUG("%f %f (%f - %f)", py, pz, ymin, ymax); - if (pz < zmin) zmin = pz; - if (pz > zmax) zmax = pz; - - other->pGeom->backprojectPointY(i, uu[j], vv[j], ymin, px, pz); - //ASTRA_DEBUG("%f %f (%f - %f)", px, pz, xmin, xmax); - if (pz < zmin) zmin = pz; - if (pz > zmax) zmax = pz; - other->pGeom->backprojectPointY(i, uu[j], vv[j], ymax, px, pz); - //ASTRA_DEBUG("%f %f (%f - %f)", px, pz, xmin, xmax); - if (pz < zmin) zmin = pz; - if (pz > zmax) zmax = pz; + std::pair fullRange = reduceProjectionVertical(pGeom, other->pGeom); + + int top_slice = 0, bottom_slice = 0; + + if (fullRange.first < fullRange.second) { + + + // TOP SLICE + + int zmin = 0; + int zmax = pGeom->getGridSliceCount()-1; // (Don't try empty region) + + // Setting top slice to zmin is always valid. + + while (zmin < zmax) { + int zmid = (zmin + zmax + 1) / 2; + + bool ok = testVolumeRange(fullRange, pGeom, other->pGeom, + 0, zmid); + + ASTRA_DEBUG("binsearch min: [%d,%d], %d, %s", zmin, zmax, zmid, ok ? "ok" : "removed too much"); + + if (ok) + zmin = zmid; + else + zmax = zmid - 1; } - } - //ASTRA_DEBUG("coord extent: %f - %f", zmin, zmax); + top_slice = zmin; + - // Clip both zmin and zmax to get rid of extreme (or infinite) values - // NB: When individual pz values are +/-Inf, the sign is determined - // by ray direction and on which side of the face the ray passes. - if (zmin < pGeom->getWindowMinZ() - 2*pixz) - zmin = pGeom->getWindowMinZ() - 2*pixz; - if (zmin > pGeom->getWindowMaxZ() + 2*pixz) - zmin = pGeom->getWindowMaxZ() + 2*pixz; - if (zmax < pGeom->getWindowMinZ() - 2*pixz) - zmax = pGeom->getWindowMinZ() - 2*pixz; - if (zmax > pGeom->getWindowMaxZ() + 2*pixz) - zmax = pGeom->getWindowMaxZ() + 2*pixz; + // BOTTOM SLICE - zmin = (zmin - pixz - pGeom->getWindowMinZ()) / pixz; - zmax = (zmax + pixz - pGeom->getWindowMinZ()) / pixz; + zmin = top_slice + 1; // (Don't try empty region) + zmax = pGeom->getGridSliceCount(); - int _zmin = (int)floor(zmin); - int _zmax = (int)ceil(zmax); + // Setting bottom slice to zmax is always valid - //ASTRA_DEBUG("index extent: %d - %d", _zmin, _zmax); + while (zmin < zmax) { + int zmid = (zmin + zmax) / 2; - if (_zmin < 0) - _zmin = 0; - if (_zmax > pGeom->getGridSliceCount()) - _zmax = pGeom->getGridSliceCount(); + bool ok = testVolumeRange(fullRange, pGeom, other->pGeom, + zmid, pGeom->getGridSliceCount()); + + ASTRA_DEBUG("binsearch max: [%d,%d], %d, %s", zmin, zmax, zmid, ok ? "ok" : "removed too much"); + + if (ok) + zmax = zmid; + else + zmin = zmid + 1; + + } + + bottom_slice = zmax; - if (_zmax <= _zmin) { - _zmin = _zmax = 0; } - //ASTRA_DEBUG("adjusted extent: %d - %d", _zmin, _zmax); + + ASTRA_DEBUG("found extent: %d - %d", top_slice, bottom_slice); + + top_slice -= 1; + if (top_slice < 0) + top_slice = 0; + bottom_slice += 1; + if (bottom_slice >= pGeom->getGridSliceCount()) + bottom_slice = pGeom->getGridSliceCount(); + + ASTRA_DEBUG("adjusted extent: %d - %d", top_slice, bottom_slice); + + double pixz = pGeom->getPixelLengthZ(); CVolumePart *sub = new CVolumePart(); sub->subX = this->subX; sub->subY = this->subY; - sub->subZ = this->subZ + _zmin; + sub->subZ = this->subZ + top_slice; sub->pData = pData; - if (_zmin == _zmax) { + if (top_slice == bottom_slice) { sub->pGeom = 0; } else { sub->pGeom = new CVolumeGeometry3D(pGeom->getGridColCount(), pGeom->getGridRowCount(), - _zmax - _zmin, + bottom_slice - top_slice, pGeom->getWindowMinX(), pGeom->getWindowMinY(), - pGeom->getWindowMinZ() + _zmin * pixz, + pGeom->getWindowMinZ() + top_slice * pixz, pGeom->getWindowMaxX(), pGeom->getWindowMaxY(), - pGeom->getWindowMinZ() + _zmax * pixz); + pGeom->getWindowMinZ() + bottom_slice * pixz); } - ASTRA_DEBUG("Reduce volume from %d - %d to %d - %d", this->subZ, this->subZ + pGeom->getGridSliceCount(), this->subZ + _zmin, this->subZ + _zmax); + ASTRA_DEBUG("Reduce volume from %d - %d to %d - %d ( %f - %f )", this->subZ, this->subZ + pGeom->getGridSliceCount(), this->subZ + top_slice, this->subZ + bottom_slice, pGeom->getWindowMinZ() + top_slice * pixz, pGeom->getWindowMinZ() + bottom_slice * pixz); return sub; } @@ -742,62 +821,16 @@ void CCompositeGeometryManager::CProjectionPart::getDims(size_t &x, size_t &y, s } + CCompositeGeometryManager::CPart* CCompositeGeometryManager::CProjectionPart::reduce(const CPart *_other) { const CVolumePart *other = dynamic_cast(_other); assert(other); - double vmin_g, vmax_g; - - // reduce self to only cover intersection with projection of VolumePart - // (Project corners of volume, take bounding box) - - for (int i = 0; i < pGeom->getProjectionCount(); ++i) { - - double vol_u[8]; - double vol_v[8]; - - double pixx = other->pGeom->getPixelLengthX(); - double pixy = other->pGeom->getPixelLengthY(); - double pixz = other->pGeom->getPixelLengthZ(); - - // TODO: Is 0.5 sufficient? - double xmin = other->pGeom->getWindowMinX() - 0.5 * pixx; - double xmax = other->pGeom->getWindowMaxX() + 0.5 * pixx; - double ymin = other->pGeom->getWindowMinY() - 0.5 * pixy; - double ymax = other->pGeom->getWindowMaxY() + 0.5 * pixy; - double zmin = other->pGeom->getWindowMinZ() - 0.5 * pixz; - double zmax = other->pGeom->getWindowMaxZ() + 0.5 * pixz; - - pGeom->projectPoint(xmin, ymin, zmin, i, vol_u[0], vol_v[0]); - pGeom->projectPoint(xmin, ymin, zmax, i, vol_u[1], vol_v[1]); - pGeom->projectPoint(xmin, ymax, zmin, i, vol_u[2], vol_v[2]); - pGeom->projectPoint(xmin, ymax, zmax, i, vol_u[3], vol_v[3]); - pGeom->projectPoint(xmax, ymin, zmin, i, vol_u[4], vol_v[4]); - pGeom->projectPoint(xmax, ymin, zmax, i, vol_u[5], vol_v[5]); - pGeom->projectPoint(xmax, ymax, zmin, i, vol_u[6], vol_v[6]); - pGeom->projectPoint(xmax, ymax, zmax, i, vol_u[7], vol_v[7]); - - double vmin = vol_v[0]; - double vmax = vol_v[0]; - - for (int j = 1; j < 8; ++j) { - if (vol_v[j] < vmin) - vmin = vol_v[j]; - if (vol_v[j] > vmax) - vmax = vol_v[j]; - } - - if (i == 0 || vmin < vmin_g) - vmin_g = vmin; - if (i == 0 || vmax > vmax_g) - vmax_g = vmax; - } - - // fprintf(stderr, "v extent: %f %f\n", vmin_g, vmax_g); - - int _vmin = (int)floor(vmin_g - 1.0f); - int _vmax = (int)ceil(vmax_g + 1.0f); + std::pair r = reduceProjectionVertical(other->pGeom, pGeom); + // fprintf(stderr, "v extent: %f %f\n", r.first, r.second); + int _vmin = (int)floor(r.first - 1.0); + int _vmax = (int)ceil(r.second + 1.0); if (_vmin < 0) _vmin = 0; if (_vmax > pGeom->getDetectorRowCount()) -- cgit v1.2.3