Ordered Subset FISTA added and demos updated in DemoRD2

1 files changed, 65 insertions, 21 deletions

diff --git a/demos/DemoRD2.m b/demos/DemoRD2.m
index 293c1cd..f177e26 100644
--- a/demos/DemoRD2.m
+++ b/demos/DemoRD2.m
@@ -1,6 +1,6 @@
 % Demonstration of tomographic 3D reconstruction from X-ray synchrotron
 % dataset (dendrites) using various data fidelities
-% ! can take up to 15-20 minutes to run for the whole 3D data !
+% ! It is advisable not to run the whole script, it will take lots of time to reconstruct the whole 3D data using many algorithms !
 clear all
 close all
 %%
@@ -30,7 +30,7 @@ Weights3D = single(data_raw3D); % weights for PW model
 clear data_raw3D
 %%
 % set projection/reconstruction geometry here
-Z_slices = 20;
+Z_slices = 1;
 det_row_count = Z_slices;
 proj_geom = astra_create_proj_geom('parallel3d', 1, 1, det_row_count, size_det, angles_rad);
 vol_geom = astra_create_vol_geom(recon_size,recon_size,Z_slices);
@@ -38,70 +38,114 @@ vol_geom = astra_create_vol_geom(recon_size,recon_size,Z_slices);
 fprintf('%s\n', 'Reconstruction using FBP...');
 FBP = iradon(Sino3D(:,:,10), angles,recon_size);
 figure; imshow(FBP , [0, 3]); title ('FBP reconstruction');
+
+%--------FISTA_REC modular reconstruction alogrithms---------
 %%
-fprintf('%s\n', 'Reconstruction using FISTA-PWLS without regularization...');
+fprintf('%s\n', 'Reconstruction using FISTA-OS-PWLS without regularization...');
 clear params
 params.proj_geom = proj_geom; % pass geometry to the function
 params.vol_geom = vol_geom;
 params.sino = Sino3D;
-params.iterFISTA  = 1;
+params.iterFISTA  = 12;
 params.weights = Weights3D;
+params.subsets = 16; % the number of ordered subsets 
 params.show = 1;
 params.maxvalplot = 2.5; params.slice = 2;
 
-tic; [X_fista, output] = FISTA_REC(params); toc;
-figure; imshow(X_fista(:,:,params.slice) , [0, 2.5]); title ('FISTA-PWLS reconstruction');
+tic; [X_fista, outputFISTA] = FISTA_REC(params); toc;
+figure; imshow(X_fista(:,:,params.slice) , [0, 2.5]); title ('FISTA-OS-PWLS reconstruction');
 %%
-fprintf('%s\n', 'Reconstruction using FISTA-PWLS-TV...');
+fprintf('%s\n', 'Reconstruction using FISTA-OS-PWLS-TV...');
 clear params
 params.proj_geom = proj_geom; % pass geometry to the function
 params.vol_geom = vol_geom;
 params.sino = Sino3D;
-params.iterFISTA  = 40;
+params.iterFISTA  = 12;
 params.Regul_Lambda_FGPTV = 0.005; % TV regularization parameter for FGP-TV
 params.weights = Weights3D;
+params.subsets = 16; % the number of ordered subsets 
 params.show = 1;
 params.maxvalplot = 2.5; params.slice = 2;
 
-tic; [X_fista_TV] = FISTA_REC(params); toc;
-figure; imshow(X_fista_TV(:,:,params.slice) , [0, 2.5]); title ('FISTA-PWLS-TV reconstruction');
-%%
+tic; [X_fista_TV, outputTV] = FISTA_REC(params); toc;
+figure; imshow(X_fista_TV(:,:,params.slice) , [0, 2.5]); title ('FISTA-OS-PWLS-TV reconstruction');
 %%
-fprintf('%s\n', 'Reconstruction using FISTA-GH-TV...');
+fprintf('%s\n', 'Reconstruction using FISTA-OS-GH-TV...');
 clear params
 params.proj_geom = proj_geom; % pass geometry to the function
 params.vol_geom = vol_geom;
 params.sino = Sino3D;
-params.iterFISTA  = 40;
+params.iterFISTA  = 12;
 params.Regul_Lambda_FGPTV = 0.005; % TV regularization parameter for FGP-TV
 params.Ring_LambdaR_L1 = 0.002; % Soft-Thresh L1 ring variable parameter
 params.Ring_Alpha = 21; % to boost ring removal procedure
 params.weights = Weights3D;
+params.subsets = 16; % the number of ordered subsets 
 params.show = 1;
 params.maxvalplot = 2.5; params.slice = 2;
 
-tic; [X_fista_GH_TV] = FISTA_REC(params); toc;
-figure; imshow(X_fista_GH_TV(:,:,params.slice) , [0, 2.5]); title ('FISTA-GH-TV reconstruction');
-%%
+tic; [X_fista_GH_TV, outputGHTV] = FISTA_REC(params); toc;
+figure; imshow(X_fista_GH_TV(:,:,params.slice) , [0, 2.5]); title ('FISTA-OS-GH-TV reconstruction');
 %%
-fprintf('%s\n', 'Reconstruction using FISTA-GH-TV-LLT...');
+fprintf('%s\n', 'Reconstruction using FISTA-OS-GH-TV-LLT...');
 clear params
 params.proj_geom = proj_geom; % pass geometry to the function
 params.vol_geom = vol_geom;
 params.sino = Sino3D;
-params.iterFISTA  = 5;
+params.iterFISTA  = 12;
 params.Regul_Lambda_FGPTV = 0.005; % TV regularization parameter for FGP-TV
-params.Regul_LambdaHO = 250;  % regularization parameter for LLT problem
+params.Regul_LambdaLLT = 100;  % regularization parameter for LLT problem
 params.Regul_tauLLT = 0.0005; % time-step parameter for the explicit scheme
 params.Ring_LambdaR_L1 = 0.002; % Soft-Thresh L1 ring variable parameter
 params.Ring_Alpha = 21; % to boost ring removal procedure
 params.weights = Weights3D;
+params.subsets = 16; % the number of ordered subsets 
 params.show = 1;
 params.maxvalplot = 2.5; params.slice = 2;
 
-tic; [X_fista_GH_TVLLT] = FISTA_REC(params); toc;
-figure; imshow(X_fista_GH_TVLLT(:,:,params.slice) , [0, 2.5]); title ('FISTA-GH-TV-LLT reconstruction');
+tic; [X_fista_GH_TVLLT, outputGH_TVLLT] = FISTA_REC(params); toc;
+figure; imshow(X_fista_GH_TVLLT(:,:,params.slice) , [0, 2.5]); title ('FISTA-OS-GH-TV-LLT reconstruction');
+
+%%
+% fprintf('%s\n', 'Reconstruction using FISTA-OS-PB...');
+% % very-slow on CPU
+% clear params
+% params.proj_geom = proj_geom; % pass geometry to the function
+% params.vol_geom = vol_geom;
+% params.sino = Sino3D(:,:,1);
+% params.iterFISTA  = 12;
+% params.Regul_LambdaPatchBased = 1; % PB regularization parameter 
+% params.Regul_PB_h = 0.1; % threhsold parameter
+% params.Ring_LambdaR_L1 = 0.002; % Soft-Thresh L1 ring variable parameter
+% params.Ring_Alpha = 21; % to boost ring removal procedure
+% params.weights = Weights3D(:,:,1);
+% params.subsets = 16; % the number of ordered subsets 
+% params.show = 1;
+% params.maxvalplot = 2.5; params.slice = 1;
+% 
+% tic; [X_fista_GH_PB, outputPB] = FISTA_REC(params); toc;
+% figure; imshow(X_fista_GH_PB(:,:,params.slice) , [0, 2.5]); title ('FISTA-OS-PB reconstruction');
+
 %%
+fprintf('%s\n', 'Reconstruction using FISTA-OS-GH-TGV...');
+% still testing...
+clear params
+params.proj_geom = proj_geom; % pass geometry to the function
+params.vol_geom = vol_geom;
+params.sino = Sino3D;
+params.iterFISTA  = 12;
+params.Regul_LambdaTGV = 0.5; % TGV regularization parameter 
+params.Regul_Iterations = 5;
+params.Ring_LambdaR_L1 = 0.002; % Soft-Thresh L1 ring variable parameter
+params.Ring_Alpha = 21; % to boost ring removal procedure
+params.weights = Weights3D;
+params.subsets = 16; % the number of ordered subsets 
+params.show = 1;
+params.maxvalplot = 2.5; params.slice = 1;
+
+tic; [X_fista_GH_TGV, outputTGV] = FISTA_REC(params); toc;
+figure; imshow(X_fista_GH_TGV(:,:,params.slice) , [0, 2.5]); title ('FISTA-OS-GH-TGV reconstruction');
+
 %%
 % fprintf('%s\n', 'Reconstruction using FISTA-Student-TV...');
 % clear params