Added snark14m distribution examples

[snark14.git] / examples / b2 / b2.in

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+**** EXAMPLE 2
+*    Creation of a small test pattern and projection data with execution of
+*    a user-defined reconstruction algorithm and analysis.
+*    
+CREATE
+Example 2,  A simple test pattern and projection data
+SPECTRUM MONOCHROMATIC with energy at 75 KeV
+OBJECTS   cx    cy    u     v     ang   den
+ELIP      0.00  0.00  0.90  0.90  0.00  2.50
+ELIP      0.00  0.00  0.80  0.60  0.00 -1.25
+ELIP      0.00  0.00  0.21  0.25  0.00  0.10
+LAST  1.00
+PHANTOM AVERAGE 1 point for estimating pixel density
+number of elements is 31  Size of a pixel is 0.07
+RAYSUM AVERAGE 1 line for estimation of ray sum with weight
+    1
+GEOMETRY
+PARALLEL UNIFORM LINE
+RAYS USER-defined 63 rays per projection at spacing 0.05
+ANGLES 30  EQUAL SPACING between the first and last angles which are
+    0.0    174.0
+MEASUREMENT PERFECT
+BACKGROUND absorption is 0.0
+RUN
+*
+PICTURE TEST
+*
+PROJECTION REAL
+*
+MODE LOWER constraint set at 0.0  UPPER constraint set at 2.5
+*
+SELECT USER RAYSEQ
+STEP projections by 10 and rays by 1
+*
+STOP TERMINATION VARIANCE at 0.01
+*
+EXECUTE AVERAGE ART SMOOTH
+Example 2a  underrelaxed art4 with variable tolerance
+smoothing threshold is 0.2  Weights are 2.25 1.5 1.0
+111111111111111111111111111111111111111111111111111
+ART4  RELAXATION CONSTANT = 0.025  TOLERANCE VARIABLE decreasing
+CONSTRAINT BOUND CONRELAX CONSTANT = 0.5 NOMLIZE at each iteration
+*
+STOP ITERATIONS = 30
+*
+EXECUTE ALP1
+Example 2b  underrelaxed art with extrapolation
+*
+* Reset mode to unconstrained
+MODE
+*
+EVALUATE RESOLUTION
+Example 2a  underrelaxed art4
+WHOLEPIC
+2222222222222222222222222222222222222222
+*
+LINES COLUMNS 15 and 18 are to be printed
+1         1         1         1
+*
+END
+