[bug #63171] Strange patterns on warped images

[Mohammad Akhlaghi]

Follow-up Comment #18, bug #63171 (project gnuastro):

While I was talking about this feature (Moiré pattern
<https://en.wikipedia.org/wiki/Moir%C3%A9_pattern>) with David Muniesa (at
CEFCA), he mentioned that the SWarp manual
<https://raw.githubusercontent.com/astromatic/swarp/legacy_doc/prevdoc/swarp.pdf>
also talks about it in Figure 7 on page 20 (of the latest version from
December 17, 2010). The proposed solution there is also oversampling!

Pedram, do you have any thoughts on how to reduce/improve it without requiring
an oversampling (which is very expensive in CPU and RAM usage)?


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