New answers tagged imagemagick
In addition to the above answer, you can have some checks. From your Software Center you can know the recent installed or updated apps. And you can know which apps have imagemagick as dependency so you can know which app had installed it. apt-cache rdepends imagemagick sample output: Reverse Depends: inkscape graphicsmagick-imagemagick-compat ...
Imagemagick was installed, because it is required by another program that you recently (May 25) installed. No voodoo, no magic. ;)
I'll plagiarize the answer I just posted to a related question. It can be very complicated to get good pdf output from convert. Try img2pdf instead. From the readme: Lossless conversion of images to PDF without unnecessarily re-encoding JPEG and JPEG2000 files. Thus, no loss of quality and no unnecessary large output file.
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