--- /dev/null
+ snark14.s170426 - A PICTURE RECONSTRUCTION PROGRAM
+
+
+ <*> EXAMPLE 5
+
+ <*> STAR PATTERN WITH 24 PARALLEL STRIP PROJECTIONS
+
+ <*> RECONSTRUCTION BY ALL APPROPRIATE ALGORITHMS WITH DEFAULT
+
+ <*> OR EASY OPTIONS.
+
+ <*>
+
+ <#> CREATE
+
+ EXAMPLE 5 STAR PATTERN WITH 24 PARALLEL STRIP PROJECTIONS
+
+
+ <#> SPECTRUM MONOCHROMATIC 10
+ energy spectrum is monochromatic at energy level 10
+
+
+ <#> OBJECTS
+ description of objects
+ density at levels
+ numb type x-coord y-coord x-length y-length angle av dens 10
+
+ 1 sect 0.0000 -24.0000 6.0000 24.0000 0.0000 1.0000 1.0000
+
+ 2 sect 21.0000 -12.0000 6.0000 24.0000 60.0000 1.0000 1.0000
+
+ 3 sect 21.0000 12.0000 6.0000 24.0000 120.0000 1.0000 1.0000
+
+ 4 sect 0.0000 24.0000 6.0000 24.0000 180.0000 1.0000 1.0000
+
+ 5 sect -21.0000 12.0000 6.0000 24.0000 240.0000 1.0000 1.0000
+
+ 6 sect -21.0000 -12.0000 6.0000 24.0000 300.0000 1.0000 1.0000
+
+ scale factor multiplying object densities 1.0000
+
+ seed set to 0
+ inhomogeneity set to 0.0000
+
+ <#> PHANTOM AVERAGE 5
+
+ this run will generate a phantom
+ density in each pixel is obtained as the average of 5 x 5 points
+
+
+ <#> 25 PIXELS OF SIZE 2.0
+ picture size 25 x 25, pixel size 2.0000
+
+
+ <#> RAYSUM AVERAGE 1
+
+ this run will generate projection data
+ projection data are calculated by dividing each ray interval into 1 substrips
+
+ with aperture (substrip) weights 1
+
+
+ <#> GEOMETRY
+
+
+ <#> PARALLEL UNIFORM STRIP
+ rays are parallel with uniform spacing between rays
+ data collected along strips
+
+
+
+ <#> RAYS USER 25 DETECTOR SPACING 2.0
+ number of rays per projection 25
+ at detector spacing 2.0000
+
+
+ <#> ANGLES 24 EQUAL SPACING
+ total number of projections 24
+
+ projection angles 0.0000 7.5000 15.0000 22.5000 30.0000 37.5000 45.0000 52.5000 60.0000 67.5000
+ 75.0000 82.5000 90.0000 97.5000 105.0000 112.5000 120.0000 127.5000 135.0000 142.5000
+ 150.0000 157.5000 165.0000 172.5000
+
+
+ <#> MEASUREMENT PERFECT
+ projection data are noiseless
+
+
+ <#> BACKGROUND 0.0
+ at levels
+ 10
+ background absorption 0.0000
+
+
+ <#> RUN
+ 0.000 seconds phantom creation
+ 0.000 seconds projection data creation
+ 0.000 seconds used for processing command crea
+
+
+ <*>
+
+ <#> PICTURE TEST
+
+ EXAMPLE 5 STAR PATTERN WITH 24 PARALLEL STRIP PROJECTIONS
+
+
+ <#> spec mono 10
+ energy spectrum is monochromatic at energy level 10
+
+
+ <#> obje
+ description of objects
+ density at levels
+ numb type x-coord y-coord x-length y-length angle av dens 10
+
+ 1 sect 0.0000 -24.0000 6.0000 24.0000 0.0000 1.0000 1.0000
+
+ 2 sect 21.0000 -12.0000 6.0000 24.0000 60.0000 1.0000 1.0000
+
+ 3 sect 21.0000 12.0000 6.0000 24.0000 120.0000 1.0000 1.0000
+
+ 4 sect 0.0000 24.0000 6.0000 24.0000 180.0000 1.0000 1.0000
+
+ 5 sect -21.0000 12.0000 6.0000 24.0000 240.0000 1.0000 1.0000
+
+ 6 sect -21.0000 -12.0000 6.0000 24.0000 300.0000 1.0000 1.0000
+
+ scale factor multiplying object densities 1.0000
+
+ seed set to 0
+ inhomogeneity set to 0.0000
+
+ <#> phan aver 5
+
+ density in each pixel is obtained as the average of 5 x 5 points
+
+
+ <#> pixe 25 size 2.0000
+ picture size 25 x 25, pixel size 2.0000
+
+ test picture read
+ EXAMPLE 5 STAR PATTERN WITH 24 PARALLEL STRIP PROJECTIONS
+ 0.003 seconds used for processing command pict
+
+
+ <*>
+
+ <#> PROJECTION REAL
+
+ EXAMPLE 5 STAR PATTERN WITH 24 PARALLEL STRIP PROJECTIONS
+
+
+ <#> spec mono 10
+ energy spectrum is monochromatic at energy level 10
+
+
+ <#> obje
+ description of objects
+ density at levels
+ numb type x-coord y-coord x-length y-length angle av dens 10
+
+ 1 sect 0.0000 -24.0000 6.0000 24.0000 0.0000 1.0000 1.0000
+
+ 2 sect 21.0000 -12.0000 6.0000 24.0000 60.0000 1.0000 1.0000
+
+ 3 sect 21.0000 12.0000 6.0000 24.0000 120.0000 1.0000 1.0000
+
+ 4 sect 0.0000 24.0000 6.0000 24.0000 180.0000 1.0000 1.0000
+
+ 5 sect -21.0000 12.0000 6.0000 24.0000 240.0000 1.0000 1.0000
+
+ 6 sect -21.0000 -12.0000 6.0000 24.0000 300.0000 1.0000 1.0000
+
+ scale factor multiplying object densities 1.0000
+
+ seed set to 0
+ inhomogeneity set to 0.0000
+
+ <#> rays aver 1
+
+ projection data are calculated by dividing each ray interval into 1 substrips
+
+ with aperture (substrip) weights 1
+
+
+ <#> geom
+
+
+ <#> para unif stri
+ rays are parallel with uniform spacing between rays
+ data collected along strips
+
+
+
+ <#> rays user 25 spacing 2.0000
+ number of rays per projection 25
+ snark computed number of rays 37
+ at detector spacing 2.0000
+
+
+ <#> angl 24
+ total number of projections 24
+
+
+ projection angles 0.0000 7.5000 15.0000 22.5000 30.0000 37.5000 45.0000 52.5000 60.0000 67.5000
+ 75.0000 82.5000 90.0000 97.5000 105.0000 112.5000 120.0000 127.5000 135.0000 142.5000
+ 150.0000 157.5000 165.0000 172.5000
+
+
+ <#> meas perf
+ projection data are noiseless
+
+
+ <#> back 0.0000
+ at levels
+ 10
+ background absorption 0.0000
+
+ estimate of totlen = 28263.966195
+ estimate of totden = 10749.116539
+ estimate of average density = 0.3803
+ projection data read
+ EXAMPLE 5 STAR PATTERN WITH 24 PARALLEL STRIP PROJECTIONS
+ 0.000 seconds used for processing command proj
+
+
+ <*>
+
+ <#> EXECUTE BACKPROJECTION
+
+ EXAMPLE 5A CONTINUOUS BACKPROJECTION WITH LINEAR INTERPOLATION
+
+ <#> CONTINUOUS 2 MULTIPLICATIVE
+ continuous back-projection
+ 2 order lagrange interpolation
+ multiplicative normalization
+ algorithm executed in iteration 1
+ 0.000 seconds for the execution of the algorithm
+ reconstruction completed after iteration 1
+ 0.000 seconds for this iteration
+ 0.000 seconds used for processing command exec
+
+
+ <*>
+
+ <#> EXECUTE CONVOLUTION
+
+ EXAMPLE 5B CONVOLUTION WITH BANDLIMITING FILTER & LINEAR INTERPOLATION
+
+ <#> BANDLIMITING 1.0 2
+ convolution reconstruction algorithm
+ using filter band
+ cutoff (or alpha) = 1.0000
+ 2 point lagrange interpolation
+ algorithm executed in iteration 1
+ 0.000 seconds for the execution of the algorithm
+ reconstruction completed after iteration 1
+ 0.000 seconds for this iteration
+ 0.004 seconds used for processing command exec
+
+
+ <*>
+
+ <#> EXECUTE RFL
+
+ EXAMPLE 5C RHO FILTERED LAYERGRAM WITH BANDLIMITING FILTER & LINEAR INTERPOLATIO
+
+ <#> BANDLIMITING 1.0 2
+ rho-filtered layergram reconstruction algorithm
+ using filter band
+ cutoff (or alpha) = 1.0000
+ 2 point lagrange interpolation
+ backprojection is performed on a 26 x 26 region
+ algorithm executed in iteration 1
+ 0.000 seconds for the execution of the algorithm
+ reconstruction completed after iteration 1
+ 0.000 seconds for this iteration
+ 0.000 seconds used for processing command exec
+
+
+ <*>
+
+ <#> EXECUTE FOURIER
+
+ EXAMPLE 5D FOURIER WITH BANDLIMITING FILTER & LINEAR INTERPOLATION
+f o u r i e r r e c o n s t r u c t i o n
+
+strip projections
+
+ <#> BANDLIMITING 1.0 3
+filter= 0
+cutoff= 1.00
+interp= 3
+nsize1= 38
+nsize2= 26
+time for projection transforms : 0.000 seconds
+time for interpolations : 0.000 seconds
+time for backtransform : 0.000 seconds
+ algorithm executed in iteration 1
+ 0.000 seconds for the execution of the algorithm
+ reconstruction completed after iteration 1
+ 0.000 seconds for this iteration
+ 0.000 seconds used for processing command exec
+
+
+ <*>
+
+ <#> STOP TERMINATION VARIANCE = 0.1
+ termination test vari
+ epsilon = 0.100000
+ 0.000 seconds used for processing command stop
+
+
+ <*>
+
+ <#> EXECUTE ART
+
+ EXAMPLE 5F ART WITH NO TRICKS
+
+ <#> ART3
+ art3 method
+ relaxation parameter is 1.0
+ norm is 2
+ tolerance is 0.0
+
+ <#> CONSTRAINT ART2 STEPS 888
+ constraint art2 way
+ picture is not normalized
+ 888 rays are used for each iteration
+ algorithm executed in iteration 1
+ 0.000 seconds for the execution of the algorithm
+ iteration 1 completed
+ 0.000 seconds for this iteration
+ algorithm executed in iteration 2
+ 0.000 seconds for the execution of the algorithm
+ iteration 2 completed
+ 0.000 seconds for this iteration
+ algorithm executed in iteration 3
+ 0.000 seconds for the execution of the algorithm
+ iterative process stops at iteration 3
+ the change in variance is less than 0.006869 of the variance
+ reconstruction completed after iteration 3
+ 0.000 seconds for this iteration
+ 0.000 seconds for all iterations
+ 0.004 seconds used for processing command exec
+
+
+ <*>
+
+ <#> EXECUTE MART
+
+ EXAMPLE 5G MULTIPLICATIVE ART A LA LENT
+
+ <#> METHOD LENT 888 1.0 0.0
+ multiplicative art version lent
+ no of rays used in each iteration 888
+ underrelaxation factor 1.00000
+ all projection data with values less than 1.0000000000e-20 are ignored
+ reconstruction not normalized
+ entropy functional not calculated
+ algorithm executed in iteration 1
+ 0.000 seconds for the execution of the algorithm
+ iteration 1 completed
+ 0.000 seconds for this iteration
+ algorithm executed in iteration 2
+ 0.004 seconds for the execution of the algorithm
+ iterative process stops at iteration 2
+ the change in variance is less than 0.009779 of the variance
+ reconstruction completed after iteration 2
+ 0.004 seconds for this iteration
+ 0.004 seconds for all iterations
+ 0.007 seconds used for processing command exec
+
+
+ <*>
+
+ <#> EXECUTE QUADRATIC
+
+ EXAMPLE 5H OPTIMIZATION OF LEAST SQUARES FUNCTIONAL USING CONJUGATE
+
+ <#> 3 3 1 0 1 0.1 0.0 0.0
+
+ <#> 1 1 1 0 0 0 1.0 0.1 0
+ the conjugate gradient algorithm
+
+ direct gradient computation
+ =================================
+ algorithm executed in iteration 1
+ 0.000 seconds for the execution of the algorithm
+ iteration 1 completed
+ 0.000 seconds for this iteration
+ algorithm executed in iteration 2
+ 0.003 seconds for the execution of the algorithm
+ iteration 2 completed
+ 0.003 seconds for this iteration
+ algorithm executed in iteration 3
+ 0.000 seconds for the execution of the algorithm
+ iteration 3 completed
+ 0.000 seconds for this iteration
+ algorithm executed in iteration 4
+ 0.000 seconds for the execution of the algorithm
+ iteration 4 completed
+ 0.000 seconds for this iteration
+ algorithm executed in iteration 5
+ 0.004 seconds for the execution of the algorithm
+ iterative process stops at iteration 5
+ the change in variance is less than 0.095803 of the variance
+ reconstruction completed after iteration 5
+ 0.004 seconds for this iteration
+ 0.007 seconds for all iterations
+ 0.007 seconds used for processing command exec
+
+
+ <*>
+
+ <#> EXECUTE SIRT
+
+ EXAMPLE 5I GENERALIZED SIMULTANEOUS ITERATIVE RECONSTRUCTION TECHNOLOGY
+ user rays selected
+
+ <#> METHOD GSIRT
+ gsirt method
+ sigma = inverse of relaxation = 1.0000
+
+ this run is unconstrained sirt
+ this run is unnormalized sirt
+ starting picture is as in execute command
+ algorithm executed in iteration 1
+ 0.003 seconds for the execution of the algorithm
+ iteration 1 completed
+ 0.003 seconds for this iteration
+ algorithm executed in iteration 2
+ 0.000 seconds for the execution of the algorithm
+ iteration 2 completed
+ 0.000 seconds for this iteration
+ algorithm executed in iteration 3
+ 0.000 seconds for the execution of the algorithm
+ iteration 3 completed
+ 0.000 seconds for this iteration
+ algorithm executed in iteration 4
+ 0.000 seconds for the execution of the algorithm
+ iteration 4 completed
+ 0.000 seconds for this iteration
+ algorithm executed in iteration 5
+ 0.000 seconds for the execution of the algorithm
+ iteration 5 completed
+ 0.000 seconds for this iteration
+ algorithm executed in iteration 6
+ 0.002 seconds for the execution of the algorithm
+ iteration 6 completed
+ 0.002 seconds for this iteration
+ algorithm executed in iteration 7
+ 0.000 seconds for the execution of the algorithm
+ iteration 7 completed
+ 0.000 seconds for this iteration
+ algorithm executed in iteration 8
+ 0.000 seconds for the execution of the algorithm
+ iteration 8 completed
+ 0.000 seconds for this iteration
+ algorithm executed in iteration 9
+ 0.000 seconds for the execution of the algorithm
+ iteration 9 completed
+ 0.000 seconds for this iteration
+ algorithm executed in iteration 10
+ 0.000 seconds for the execution of the algorithm
+ iteration 10 completed
+ 0.000 seconds for this iteration
+ algorithm executed in iteration 11
+ 0.002 seconds for the execution of the algorithm
+ iteration 11 completed
+ 0.002 seconds for this iteration
+ algorithm executed in iteration 12
+ 0.000 seconds for the execution of the algorithm
+ iterative process stops at iteration 12
+ the change in variance is less than 0.086811 of the variance
+ reconstruction completed after iteration 12
+ 0.000 seconds for this iteration
+ 0.008 seconds for all iterations
+ 0.008 seconds used for processing command exec
+
+
+ <*>
+
+ <#> EVALUATE
+
+ EXAMPLE 5 RECONSTRUCTION OF STAR PATTERN FROM PARALLEL PROJECTIONS
+
+ <#> WHOLEPIC
+ Region cx cy u v ang t1 t2
+
+ wholepic -1e+20 1e+20
+
+ iterations 1 2 3 4 5 6 7 8 9 10
+ 11
+ last iteration
+
+ 0.003 seconds used for processing command eval
+
+
+ <*>
+
+ <#> END
projects / snark14.git / blobdiff