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In this note In this note we show how peak finder versions v2,3,4 work on fiber diffraction experiment exp=cxif5315:run=169 data.
Test data
exp=cxif5315:run=169
Use of peak finders
See for detail
- Hit/Peak Finding Details - description of algorithms
- ImgAlgos.PyAlgos - interface methods
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This script saves a peak list:
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# Exp Run Date Time time(sec) time(nsec) fiduc Evnum Reg Seg Row Col Npix Amax Atot rcent ccent rsigma csigma rmin rmax cmin cmax bkgd rms son imrow imcol x[um] y[um] r[um] phi[deg] cxif5315 169 2015-02-22 02:20:47 1424600447 478050876 104418 0 EQU 1 162 30 38 257.1 2901.5 160.8 29.7 2.21 1.25 157 168 25 36 9.42 26.64 9.30 574 640 7582 550 7601 4.15 cxif5315 169 2015-02-22 02:20:47 1424600447 486382070 104421 1 ARC 7 126 386 22 153.6 818.7 126.5 383.6 2.76 1.77 121 132 381 388 1.80 19.08 7.95 143 618 5157 47858 48135 83.85 cxif5315 169 2015-02-22 02:20:47 1424600447 486382070 104421 1 EQU 1 159 28 50 172.0 2808.5 159.3 28.0 2.93 1.68 154 165 23 34 3.37 27.07 6.23 576 643 7912 331 7919 2.40 cxif5315 169 2015-02-22 02:20:47 1424600447 494719789 104424 2 EQU 1 150 33 44 154.4 1624.7 150.5 32.8 3.07 1.72 145 156 28 39 4.33 21.19 7.08 571 652 8900 883 8943 5.67 |
Peak list processing
For further peak list processing we use script:
cxif5315/proc-cxif5315-r0169-peaks-from-file-v4.py
which uses peak selectors.
Peak Selectors
In this section we list distribution of peak parameters right after peak finders and discuss parameter range for further selection stage in
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We process Data of cxif5315-r0169 for peaks in ARC and Equatorial region separately. Each triplet of histograms represents peak finder v2, v3, v4, respectively.
peak_finder_v2, v3, v4: ARC
- Amax is only used in pfv4 as
thr_high=150
that helps to reduce a number of seed peaks
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peak_finder_v2, v3, v4: EQU
- Amax is only used in pfv4 as
thr_high=150
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Comparison of the pfv2 with Cheetah list of peaks
Code for comparison: cxif5315/peak-list-comp-cheetah.py
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Peak-finder number of peaks accounts for arc region.
References
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