This is probably not it, it's too old (1997) and by a male student. Anyway, here are the keywords for your research:
anamorfoza w malarstwie praca doktorska filetype:pdf
Edit: The "Lover's Embrace" could be a misremembering of Para kochanków ("Pair of Lovers") by Jan Ziarnko (1608), and this article, which might be it (not a thesis but by a female Polish scholar in 2014), includes a decoded version: https://bibliotekanauki.pl/articles/706976.pdf#page=3 (NSFW)