Re: How to create a PDF from multiple JPEGs?
JPEG is indeed quite inefficient for text and line drawings, hence people mentioning PNG. I've used Irfanview sucessfully in the past to create reasonably efficient PDF files, but it does require some tweaking the settings (a.o. bulk converting to the optimal bit depth, using other settings for pages with pictures on them). A dedicated professional program might be able to do the same or slightly better with a bit less effort.
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