diff options
Diffstat (limited to 'main_func')
| -rw-r--r-- | main_func/FISTA_REC.m | 54 |
1 files changed, 15 insertions, 39 deletions
diff --git a/main_func/FISTA_REC.m b/main_func/FISTA_REC.m index bea1860..d177748 100644 --- a/main_func/FISTA_REC.m +++ b/main_func/FISTA_REC.m @@ -517,6 +517,18 @@ else % subsets loop counterInd = 1; + if (strcmp(proj_geom.type,'parallel') || strcmp(proj_geom.type,'fanflat') || strcmp(proj_geom.type,'fanflat_vec')) + % if geometry is 2D use slice-by-slice projection-backprojection routine + for kkk = 1:SlicesZ + [sino_id, sinoT] = astra_create_sino_cuda(X_t(:,:,kkk), proj_geomSUB, vol_geom); + sino_updt_Sub(:,:,kkk) = sinoT'; + astra_mex_data2d('delete', sino_id); + end + else + % for 3D geometry (watch the GPU memory overflow in earlier ASTRA versions < 1.8) + [sino_id, sino_updt_Sub] = astra_create_sino3d_cuda(X_t, proj_geomSUB, vol_geom); + astra_mex_data3d('delete', sino_id); + end for ss = 1:subsets X_old = X; t_old = t; @@ -528,18 +540,7 @@ else if (lambdaR_L1 > 0) % Group-Huber fidelity (ring removal) - if (strcmp(proj_geom.type,'parallel') || strcmp(proj_geom.type,'fanflat') || strcmp(proj_geom.type,'fanflat_vec')) - % if geometry is 2D use slice-by-slice projection-backprojection routine - for kkk = 1:SlicesZ - [sino_id, sinoT] = astra_create_sino_cuda(X_t(:,:,kkk), proj_geomSUB, vol_geom); - sino_updt_Sub(:,:,kkk) = sinoT'; - astra_mex_data2d('delete', sino_id); - end - else - % for 3D geometry (watch the GPU memory overflow in earlier ASTRA versions < 1.8) - [sino_id, sino_updt_Sub] = astra_create_sino3d_cuda(X_t, proj_geomSUB, vol_geom); - astra_mex_data3d('delete', sino_id); - end + residualSub = zeros(Detectors, numProjSub, SlicesZ,'single'); % residual for a chosen subset for kkk = 1:numProjSub @@ -550,18 +551,7 @@ else elseif (studentt > 0) % student t data fidelity - if (strcmp(proj_geom.type,'parallel') || strcmp(proj_geom.type,'fanflat') || strcmp(proj_geom.type,'fanflat_vec')) - % if geometry is 2D use slice-by-slice projection-backprojection routine - for kkk = 1:SlicesZ - [sino_id, sinoT] = astra_create_sino_cuda(X_t(:,:,kkk), proj_geomSUB, vol_geom); - sino_updt_Sub(:,:,kkk) = sinoT'; - astra_mex_data2d('delete', sino_id); - end - else - % for 3D geometry (watch the GPU memory overflow in earlier ASTRA versions < 1.8) - [sino_id, sino_updt_Sub] = astra_create_sino3d_cuda(X_t, proj_geomSUB, vol_geom); - astra_mex_data3d('delete', sino_id); - end + % artifacts removal with Students t penalty residualSub = squeeze(weights(:,CurrSubIndeces,:)).*(sino_updt_Sub - squeeze(sino(:,CurrSubIndeces,:))); @@ -576,21 +566,7 @@ else objective(i) = ff; % for the objective function output else % PWLS model - if (strcmp(proj_geom.type,'parallel') || strcmp(proj_geom.type,'fanflat') || strcmp(proj_geom.type,'fanflat_vec')) - % if geometry is 2D use slice-by-slice projection-backprojection routine - for kkk = 1:SlicesZ - [sino_id, sinoT] = astra_create_sino_cuda(X_t(:,:,kkk), proj_geomSUB, vol_geom); - sino_updt_Sub(:,:,kkk) = sinoT'; - astra_mex_data2d('delete', sino_id); - end - else - % for 3D geometry (watch the GPU memory overflow in earlier ASTRA versions < 1.8) - [sino_id, sino_updt_Sub] = astra_create_sino3d_cuda(X_t, proj_geomSUB, vol_geom); - astra_mex_data3d('delete', sino_id); - end - residualSub = squeeze(weights(:,CurrSubIndeces,:)).*(sino_updt_Sub - squeeze(sino(:,CurrSubIndeces,:))); - objective(i) = 0.5*norm(residualSub(:)); % for the objective function output - end + if (strcmp(proj_geom.type,'parallel') || strcmp(proj_geom.type,'fanflat') || strcmp(proj_geom.type,'fanflat_vec')) % if geometry is 2D use slice-by-slice projection-backprojection routine |