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-rw-r--r--matlab/tools/opTomo.m81
1 files changed, 28 insertions, 53 deletions
diff --git a/matlab/tools/opTomo.m b/matlab/tools/opTomo.m
index 71dfb1e..04b3634 100644
--- a/matlab/tools/opTomo.m
+++ b/matlab/tools/opTomo.m
@@ -44,11 +44,9 @@ classdef opTomo < opSpot
vol_id
fp_alg_id
bp_alg_id
+ proj_id
% ASTRA IDs handle
astra_handle
- % geometries
- proj_geom;
- vol_geom;
end % properties
properties ( SetAccess = private, GetAccess = public )
@@ -139,6 +137,17 @@ classdef opTomo < opSpot
error(['Only type ' 39 'cuda' 39 ' is supported ' ...
'for 3D geometries.'])
end
+
+ % setup projector
+ cfg = astra_struct('cuda3d');
+ cfg.ProjectionGeometry = proj_geom;
+ cfg.VolumeGeometry = vol_geom;
+ cfg.option.GPUindex = gpu_index;
+
+ % create projector
+ op.proj_id = astra_mex_projector3d('create', cfg);
+ % create handle to ASTRA object, for cleaning up
+ op.astra_handle = opTomo_helper_handle(op.proj_id);
% create a function handle
op.funHandle = @opTomo_intrnl3D;
@@ -148,8 +157,6 @@ classdef opTomo < opSpot
% pass object properties
op.proj_size = proj_size;
op.vol_size = vol_size;
- op.proj_geom = proj_geom;
- op.vol_geom = vol_geom;
op.cflag = false;
op.sweepflag = false;
@@ -169,10 +176,12 @@ classdef opTomo < opSpot
if issparse(x)
x = full(x);
end
-
- % convert input to single
- if isa(x, 'single') == false
+
+ if isa(x, 'double')
+ isdouble = true;
x = single(x);
+ else
+ isdouble = false;
end
% the multiplication
@@ -180,6 +189,10 @@ classdef opTomo < opSpot
% make sure output is column vector
y = y(:);
+
+ if isdouble
+ y = double(y);
+ end
end % multiply
@@ -194,7 +207,7 @@ classdef opTomo < opSpot
function y = opTomo_intrnl2D(op,x,mode)
if mode == 1
- % X is passed as a vector, reshape it into an image.
+ % x is passed as a vector, reshape it into an image.
x = reshape(x, op.vol_size);
% Matlab data copied to ASTRA data
@@ -206,7 +219,7 @@ classdef opTomo < opSpot
% retrieve Matlab array
y = astra_mex_data2d('get_single', op.sino_id);
else
- % X is passed as a vector, reshape it into a sinogram.
+ % x is passed as a vector, reshape it into a sinogram.
x = reshape(x, op.proj_size);
% Matlab data copied to ASTRA data
@@ -218,6 +231,7 @@ classdef opTomo < opSpot
% retrieve Matlab array
y = astra_mex_data2d('get_single', op.vol_id);
end
+
end % opTomo_intrnl2D
@@ -225,55 +239,16 @@ classdef opTomo < opSpot
function y = opTomo_intrnl3D(op,x,mode)
if mode == 1
- % X is passed as a vector, reshape it into an image
+ % x is passed as a vector, reshape it into an image
x = reshape(x, op.vol_size);
- % initialize output
- y = zeros(op.proj_size, 'single');
-
- % link matlab array to ASTRA
- vol_id = astra_mex_data3d_c('link', '-vol', op.vol_geom, x, 0);
- sino_id = astra_mex_data3d_c('link', '-sino', op.proj_geom, y, 1);
-
- % initialize fp algorithm
- cfg = astra_struct('FP3D_CUDA');
- cfg.ProjectionDataId = sino_id;
- cfg.VolumeDataId = vol_id;
-
- alg_id = astra_mex_algorithm('create', cfg);
-
% forward projection
- astra_mex_algorithm('iterate', alg_id);
-
- % cleanup
- astra_mex_data3d('delete', vol_id);
- astra_mex_data3d('delete', sino_id);
- astra_mex_algorithm('delete', alg_id);
+ y = astra_mex_direct('FP3D', op.proj_id, x);
else
- % X is passed as a vector, reshape it into projection data
+ % x is passed as a vector, reshape it into projection data
x = reshape(x, op.proj_size);
-
- % initialize output
- y = zeros(op.vol_size,'single');
-
- % link matlab array to ASTRA
- vol_id = astra_mex_data3d_c('link', '-vol', op.vol_geom, y, 1);
- sino_id = astra_mex_data3d_c('link', '-sino', op.proj_geom, x, 0);
- % initialize bp algorithm
- cfg = astra_struct('BP3D_CUDA');
- cfg.ProjectionDataId = sino_id;
- cfg.ReconstructionDataId = vol_id;
-
- alg_id = astra_mex_algorithm('create', cfg);
-
- % backprojection
- astra_mex_algorithm('iterate', alg_id);
-
- % cleanup
- astra_mex_data3d('delete', vol_id);
- astra_mex_data3d('delete', sino_id);
- astra_mex_algorithm('delete', alg_id);
+ y = astra_mex_direct('BP3D', op.proj_id, x);
end
end % opTomo_intrnl3D