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Diffstat (limited to 'cuda/2d/fbp.cu')
| -rw-r--r-- | cuda/2d/fbp.cu | 347 |
1 files changed, 347 insertions, 0 deletions
diff --git a/cuda/2d/fbp.cu b/cuda/2d/fbp.cu new file mode 100644 index 0000000..2feac7d --- /dev/null +++ b/cuda/2d/fbp.cu @@ -0,0 +1,347 @@ +/* +----------------------------------------------------------------------- +Copyright: 2010-2015, iMinds-Vision Lab, University of Antwerp + 2014-2015, CWI, Amsterdam + +Contact: astra@uantwerpen.be +Website: http://sf.net/projects/astra-toolbox + +This file is part of the ASTRA Toolbox. + + +The ASTRA Toolbox is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +The ASTRA Toolbox is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with the ASTRA Toolbox. If not, see <http://www.gnu.org/licenses/>. + +----------------------------------------------------------------------- +$Id$ +*/ + +#include "fbp.h" +#include "fft.h" +#include "par_bp.h" +#include "fan_bp.h" + +// For fan-beam preweighting +#include "../3d/fdk.h" + +#include "astra/Logging.h" + +#include <cuda.h> + +namespace astraCUDA { + + + +static int calcNextPowerOfTwo(int n) +{ + int x = 1; + while (x < n) + x *= 2; + + return x; +} + +// static +int FBP::calcFourierFilterSize(int _iDetectorCount) +{ + int iFFTRealDetCount = calcNextPowerOfTwo(2 * _iDetectorCount); + int iFreqBinCount = calcFFTFourierSize(iFFTRealDetCount); + + // CHECKME: Matlab makes this at least 64. Do we also need to? + return iFreqBinCount; +} + + + + +FBP::FBP() : ReconAlgo() +{ + D_filter = 0; + +} + +FBP::~FBP() +{ + reset(); +} + +void FBP::reset() +{ + if (D_filter) { + freeComplexOnDevice((cufftComplex *)D_filter); + D_filter = 0; + } +} + +bool FBP::init() +{ + return true; +} + +bool FBP::setFilter(astra::E_FBPFILTER _eFilter, const float * _pfHostFilter /* = NULL */, int _iFilterWidth /* = 0 */, float _fD /* = 1.0f */, float _fFilterParameter /* = -1.0f */) +{ + if (D_filter) + { + freeComplexOnDevice((cufftComplex*)D_filter); + D_filter = 0; + } + + if (_eFilter == astra::FILTER_NONE) + return true; // leave D_filter set to 0 + + + int iFFTRealDetCount = calcNextPowerOfTwo(2 * dims.iProjDets); + int iFreqBinCount = calcFFTFourierSize(iFFTRealDetCount); + + cufftComplex * pHostFilter = new cufftComplex[dims.iProjAngles * iFreqBinCount]; + memset(pHostFilter, 0, sizeof(cufftComplex) * dims.iProjAngles * iFreqBinCount); + + allocateComplexOnDevice(dims.iProjAngles, iFreqBinCount, (cufftComplex**)&D_filter); + + switch(_eFilter) + { + case astra::FILTER_NONE: + // handled above + break; + case astra::FILTER_RAMLAK: + case astra::FILTER_SHEPPLOGAN: + case astra::FILTER_COSINE: + case astra::FILTER_HAMMING: + case astra::FILTER_HANN: + case astra::FILTER_TUKEY: + case astra::FILTER_LANCZOS: + case astra::FILTER_TRIANGULAR: + case astra::FILTER_GAUSSIAN: + case astra::FILTER_BARTLETTHANN: + case astra::FILTER_BLACKMAN: + case astra::FILTER_NUTTALL: + case astra::FILTER_BLACKMANHARRIS: + case astra::FILTER_BLACKMANNUTTALL: + case astra::FILTER_FLATTOP: + case astra::FILTER_PARZEN: + { + genFilter(_eFilter, _fD, dims.iProjAngles, pHostFilter, iFFTRealDetCount, iFreqBinCount, _fFilterParameter); + uploadComplexArrayToDevice(dims.iProjAngles, iFreqBinCount, pHostFilter, (cufftComplex*)D_filter); + + break; + } + case astra::FILTER_PROJECTION: + { + // make sure the offered filter has the correct size + assert(_iFilterWidth == iFreqBinCount); + + for(int iFreqBinIndex = 0; iFreqBinIndex < iFreqBinCount; iFreqBinIndex++) + { + float fValue = _pfHostFilter[iFreqBinIndex]; + + for(int iProjectionIndex = 0; iProjectionIndex < (int)dims.iProjAngles; iProjectionIndex++) + { + pHostFilter[iFreqBinIndex + iProjectionIndex * iFreqBinCount].x = fValue; + pHostFilter[iFreqBinIndex + iProjectionIndex * iFreqBinCount].y = 0.0f; + } + } + uploadComplexArrayToDevice(dims.iProjAngles, iFreqBinCount, pHostFilter, (cufftComplex*)D_filter); + break; + } + case astra::FILTER_SINOGRAM: + { + // make sure the offered filter has the correct size + assert(_iFilterWidth == iFreqBinCount); + + for(int iFreqBinIndex = 0; iFreqBinIndex < iFreqBinCount; iFreqBinIndex++) + { + for(int iProjectionIndex = 0; iProjectionIndex < (int)dims.iProjAngles; iProjectionIndex++) + { + float fValue = _pfHostFilter[iFreqBinIndex + iProjectionIndex * _iFilterWidth]; + + pHostFilter[iFreqBinIndex + iProjectionIndex * iFreqBinCount].x = fValue; + pHostFilter[iFreqBinIndex + iProjectionIndex * iFreqBinCount].y = 0.0f; + } + } + uploadComplexArrayToDevice(dims.iProjAngles, iFreqBinCount, pHostFilter, (cufftComplex*)D_filter); + break; + } + case astra::FILTER_RPROJECTION: + { + int iProjectionCount = dims.iProjAngles; + int iRealFilterElementCount = iProjectionCount * iFFTRealDetCount; + float * pfHostRealFilter = new float[iRealFilterElementCount]; + memset(pfHostRealFilter, 0, sizeof(float) * iRealFilterElementCount); + + int iUsedFilterWidth = min(_iFilterWidth, iFFTRealDetCount); + int iStartFilterIndex = (_iFilterWidth - iUsedFilterWidth) / 2; + int iMaxFilterIndex = iStartFilterIndex + iUsedFilterWidth; + + int iFilterShiftSize = _iFilterWidth / 2; + + for(int iDetectorIndex = iStartFilterIndex; iDetectorIndex < iMaxFilterIndex; iDetectorIndex++) + { + int iFFTInFilterIndex = (iDetectorIndex + iFFTRealDetCount - iFilterShiftSize) % iFFTRealDetCount; + float fValue = _pfHostFilter[iDetectorIndex]; + + for(int iProjectionIndex = 0; iProjectionIndex < (int)dims.iProjAngles; iProjectionIndex++) + { + pfHostRealFilter[iFFTInFilterIndex + iProjectionIndex * iFFTRealDetCount] = fValue; + } + } + + float* pfDevRealFilter = NULL; + cudaMalloc((void **)&pfDevRealFilter, sizeof(float) * iRealFilterElementCount); // TODO: check for errors + cudaMemcpy(pfDevRealFilter, pfHostRealFilter, sizeof(float) * iRealFilterElementCount, cudaMemcpyHostToDevice); + delete[] pfHostRealFilter; + + runCudaFFT(iProjectionCount, pfDevRealFilter, iFFTRealDetCount, iFFTRealDetCount, iFFTRealDetCount, iFreqBinCount, (cufftComplex*)D_filter); + + cudaFree(pfDevRealFilter); + + break; + } + case astra::FILTER_RSINOGRAM: + { + int iProjectionCount = dims.iProjAngles; + int iRealFilterElementCount = iProjectionCount * iFFTRealDetCount; + float* pfHostRealFilter = new float[iRealFilterElementCount]; + memset(pfHostRealFilter, 0, sizeof(float) * iRealFilterElementCount); + + int iUsedFilterWidth = min(_iFilterWidth, iFFTRealDetCount); + int iStartFilterIndex = (_iFilterWidth - iUsedFilterWidth) / 2; + int iMaxFilterIndex = iStartFilterIndex + iUsedFilterWidth; + + int iFilterShiftSize = _iFilterWidth / 2; + + for(int iDetectorIndex = iStartFilterIndex; iDetectorIndex < iMaxFilterIndex; iDetectorIndex++) + { + int iFFTInFilterIndex = (iDetectorIndex + iFFTRealDetCount - iFilterShiftSize) % iFFTRealDetCount; + + for(int iProjectionIndex = 0; iProjectionIndex < (int)dims.iProjAngles; iProjectionIndex++) + { + float fValue = _pfHostFilter[iDetectorIndex + iProjectionIndex * _iFilterWidth]; + pfHostRealFilter[iFFTInFilterIndex + iProjectionIndex * iFFTRealDetCount] = fValue; + } + } + + float* pfDevRealFilter = NULL; + cudaMalloc((void **)&pfDevRealFilter, sizeof(float) * iRealFilterElementCount); // TODO: check for errors + cudaMemcpy(pfDevRealFilter, pfHostRealFilter, sizeof(float) * iRealFilterElementCount, cudaMemcpyHostToDevice); + delete[] pfHostRealFilter; + + runCudaFFT(iProjectionCount, pfDevRealFilter, iFFTRealDetCount, iFFTRealDetCount, iFFTRealDetCount, iFreqBinCount, (cufftComplex*)D_filter); + + cudaFree(pfDevRealFilter); + + break; + } + default: + { + ASTRA_ERROR("FBP::setFilter: Unknown filter type requested"); + delete [] pHostFilter; + return false; + } + } + + delete [] pHostFilter; + + return true; +} + +bool FBP::iterate(unsigned int iterations) +{ + zeroVolumeData(D_volumeData, volumePitch, dims); + + bool ok = false; + + if (fanProjs) { + // Call FDK_PreWeight to handle fan beam geometry. We treat + // this as a cone beam setup of a single slice: + + // TODO: TOffsets affects this preweighting... + + // TODO: We take the fan parameters from the last projection here + // without checking if they're the same in all projections + + float *pfAngles = new float[dims.iProjAngles]; + + float fOriginSource, fOriginDetector, fDetSize, fOffset; + for (unsigned int i = 0; i < dims.iProjAngles; ++i) { + bool ok = astra::getFanParameters(fanProjs[i], dims.iProjDets, + pfAngles[i], + fOriginSource, fOriginDetector, + fDetSize, fOffset); + if (!ok) { + ASTRA_ERROR("FBP_CUDA: Failed to extract circular fan beam parameters from fan beam geometry"); + return false; + } + } + + // We create a fake cudaPitchedPtr + cudaPitchedPtr tmp; + tmp.ptr = D_sinoData; + tmp.pitch = sinoPitch * sizeof(float); + tmp.xsize = dims.iProjDets; + tmp.ysize = dims.iProjAngles; + // and a fake Dimensions3D + astraCUDA3d::SDimensions3D dims3d; + dims3d.iVolX = dims.iVolWidth; + dims3d.iVolY = dims.iVolHeight; + dims3d.iVolZ = 1; + dims3d.iProjAngles = dims.iProjAngles; + dims3d.iProjU = dims.iProjDets; + dims3d.iProjV = 1; + dims3d.iRaysPerDetDim = dims3d.iRaysPerVoxelDim = 1; + + astraCUDA3d::FDK_PreWeight(tmp, fOriginSource, + fOriginDetector, 0.0f, 0.0f, + fDetSize, 1.0f, + m_bShortScan, dims3d, pfAngles); + } else { + // TODO: How should different detector pixel size in different + // projections be handled? + } + + if (D_filter) { + + int iFFTRealDetCount = calcNextPowerOfTwo(2 * dims.iProjDets); + int iFFTFourDetCount = calcFFTFourierSize(iFFTRealDetCount); + + cufftComplex * pDevComplexSinogram = NULL; + + allocateComplexOnDevice(dims.iProjAngles, iFFTFourDetCount, &pDevComplexSinogram); + + runCudaFFT(dims.iProjAngles, D_sinoData, sinoPitch, dims.iProjDets, iFFTRealDetCount, iFFTFourDetCount, pDevComplexSinogram); + + applyFilter(dims.iProjAngles, iFFTFourDetCount, pDevComplexSinogram, (cufftComplex*)D_filter); + + runCudaIFFT(dims.iProjAngles, pDevComplexSinogram, D_sinoData, sinoPitch, dims.iProjDets, iFFTRealDetCount, iFFTFourDetCount); + + freeComplexOnDevice(pDevComplexSinogram); + + } + + float fOutputScale = (M_PI / 2.0f) / (float)dims.iProjAngles; + + if (fanProjs) { + ok = FanBP_FBPWeighted(D_volumeData, volumePitch, D_sinoData, sinoPitch, dims, fanProjs, fOutputScale); + + } else { + ok = BP(D_volumeData, volumePitch, D_sinoData, sinoPitch, dims, parProjs, fOutputScale); + } + if(!ok) + { + return false; + } + + return true; +} + + +} |