[bug #59324] Erroneous values of rotation and scaling for some quads

[Mohammad Akhlaghi]

Follow-up Comment #1, bug #59324 (project gnuastro):

Thanks a lot Sachin, its good progress :-).

Can you add a descriptive (and human-friendly!) comment on the logic of
finding 'theta' and 's'? Something like this comment in the Warp program:

http://git.savannah.gnu.org/cgit/gnuastro.git/tree/bin/warp/ui.c#n494

Can you also show the output values? 

If most of them are fine with only a few outliers, we can use sigma-clipping
for example and reject them. Generally, in the last stages, the job becomes
statistical, so its fine to have scatter and outliers ;-). 

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