Hello, An upcoming release of OCRmyPDF, which I maintain in Debian, will call jbig2 if it can be found on PATH, or gracefully degrade. On Debian, this won't do anything, since we don't have that package.
I don't have any trained intuitions about patent law, but I assume that the fact that OCRmyPDF contains code that looks for a jbig2 executable is not any kind of patent violation? I note that the US patents on jbig2 encoding have expired. Please CC me. -- Sean Whitton