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[task #15670] Calculating reverse coefficients of TPV to SIP
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From: |
Sachin Kumar Singh |
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Subject: |
[task #15670] Calculating reverse coefficients of TPV to SIP |
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Date: |
Fri, 5 Jun 2020 14:41:19 -0400 (EDT) |
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User-agent: |
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:75.0) Gecko/20100101 Firefox/75.0 |
Update of task #15670 (project gnuastro):
Should be Finished on: Tue 02 Jun 2020 12:00:00 AM UTC => Fri 05 Jun 2020
12:00:00 AM UTC
Status: In Progress => Done
Open/Closed: Open => Closed
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Follow-up Comment #3:
The TPV->SIP conversion for both the forward and reverse coefficients is done.
For the purpose of modularisation, task #15675 was opened so that it can be
implemented later on more completely. The code for both of them can be seen in
this <https://gitlab.com/sachinkumarsingh092/gnuastro-test-files> repo. The
headers from both the `astropy` output and the test Gnuastro library are shown
below(only showing the sip keywords):
astropy output
A_0_0 = -0.5947048847413352
B_0_0 = 0.1137978770789058
A_0_1 = 0.000511373196373184
B_0_1 = -4.8067996495371E-06
A_0_2 = 9.71733789710970E-07
B_0_2 = 1.57430693484096E-07
A_0_3 = -6.2376422946773E-10
B_0_3 = 1.09648212062142E-10
A_1_0 = 0.000870132842249571
B_1_0 = 2.29272972829264E-05
A_1_1 = 5.60499034638399E-07
B_1_1 = -1.0267461779178E-07
A_1_2 = -2.5505398795854E-10
B_1_2 = 1.13553198176252E-11
A_2_0 = 1.01770599638340E-07
B_2_0 = 2.11610454127566E-08
A_2_1 = -2.1900816534747E-10
B_2_1 = -8.7030409127488E-11
A_3_0 = -4.3245647824626E-10
B_3_0 = 9.78774775200160E-12
A_ORDER = 3
B_ORDER = 3
AP_0_0 = 0.5947027254480975
AP_0_1 = -0.00051084722098179
AP_0_2 = -9.7142740986240E-07
AP_0_3 = 6.23006145804294E-10
AP_1_0 = -0.00087013061449738
AP_1_1 = -5.6125824591147E-07
AP_1_2 = 2.55427199875223E-10
AP_2_0 = -1.0182575316762E-07
AP_2_1 = 2.19178111884920E-10
AP_3_0 = 4.32572863312097E-10
BP_0_0 = -0.1137554307878905
BP_0_1 = 4.86538043105739E-06
BP_0_2 = -1.5782581966889E-07
BP_0_3 = -1.0913649219761E-10
BP_1_0 = -2.3010534103024E-05
BP_1_1 = 1.02678606812591E-07
BP_1_2 = -1.1385628397709E-11
BP_2_0 = -2.1189099828072E-08
BP_2_1 = 8.69309671092149E-11
BP_3_0 = -9.7657624529546E-12
AP_ORDER= 3
BP_ORDER= 3
test Gnuastro library:
A_ORDER = 3 / SIP polynomial degree, axis 1, pixel-to-sky
A_0_0 = -5.947048847413E-01 / SIP distortion coefficient:
A_0_1 = 5.113731963732E-04 / SIP distortion coefficient: y
A_0_2 = 9.717337897110E-07 / SIP distortion coefficient: yy
A_0_3 = -6.237642294677E-10 / SIP distortion coefficient: yyy
A_1_0 = 8.701328422496E-04 / SIP distortion coefficient: x
A_1_1 = 5.604990346384E-07 / SIP distortion coefficient: xy
A_1_2 = -2.550539879585E-10 / SIP distortion coefficient: xyy
A_2_0 = 1.017705996383E-07 / SIP distortion coefficient: xx
A_2_1 = -2.190081653475E-10 / SIP distortion coefficient: xxy
A_3_0 = -4.324564782463E-10 / SIP distortion coefficient: xxx
AP_ORDER= 3 / SIP polynomial degree, axis 1, sky-to-pixel
AP_0_0 = 5.947027256946E-01 / SIP inverse coefficient:
AP_0_1 = -5.108472207693E-04 / SIP inverse coefficient: y
AP_0_2 = -9.714274099989E-07 / SIP inverse coefficient: yy
AP_0_3 = 6.230061458592E-10 / SIP inverse coefficient: yyy
AP_1_0 = -8.701306143968E-04 / SIP inverse coefficient: x
AP_1_1 = -5.612582459744E-07 / SIP inverse coefficient: xy
AP_1_2 = 2.554271997553E-10 / SIP inverse coefficient: xyy
AP_2_0 = -1.018257530987E-07 / SIP inverse coefficient: xx
AP_2_1 = 2.191781118001E-10 / SIP inverse coefficient: xxy
AP_3_0 = 4.325728632946E-10 / SIP inverse coefficient: xxx
B_ORDER = 3 / SIP polynomial degree, axis 2, pixel-to-sky
B_0_0 = 1.137978770789E-01 / SIP distortion coefficient:
B_0_1 = -4.806799649759E-06 / SIP distortion coefficient: y
B_0_2 = 1.574306934841E-07 / SIP distortion coefficient: yy
B_0_3 = 1.096482120621E-10 / SIP distortion coefficient: yyy
B_1_0 = 2.292729728293E-05 / SIP distortion coefficient: x
B_1_1 = -1.026746177918E-07 / SIP distortion coefficient: xy
B_1_2 = 1.135531981763E-11 / SIP distortion coefficient: xyy
B_2_0 = 2.116104541276E-08 / SIP distortion coefficient: xx
B_2_1 = -8.703040912749E-11 / SIP distortion coefficient: xxy
B_3_0 = 9.787747752002E-12 / SIP distortion coefficient: xxx
BP_ORDER= 3 / SIP polynomial degree, axis 2, sky-to-pixel
BP_0_0 = -1.137554307916E-01 / SIP inverse coefficient:
BP_0_1 = 4.865380431666E-06 / SIP inverse coefficient: y
BP_0_2 = -1.578258196681E-07 / SIP inverse coefficient: yy
BP_0_3 = -1.091364921971E-10 / SIP inverse coefficient: yyy
BP_1_0 = -2.301053410235E-05 / SIP inverse coefficient: x
BP_1_1 = 1.026786068123E-07 / SIP inverse coefficient: xy
BP_1_2 = -1.138562839701E-11 / SIP inverse coefficient: xyy
BP_2_0 = -2.118909982744E-08 / SIP inverse coefficient: xx
BP_2_1 = 8.693096710961E-11 / SIP inverse coefficient: xxy
BP_3_0 = -9.765762452377E-12 / SIP inverse coefficient: xxx
This task can be closed now.
_______________________________________________________
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