03-18-2019, 04:36 PM
The first thing: Gimp will import a PDF with a default value of 100 pixels-per-inch (ppi) That is often too low a value, so increase it in the PDF import dialogue.
However, take the PDF origins into account. It will be an image file of some sort wrapped up as a PDF. Newspaper scans, then maybe greyscale rather than colour. The embedded image compressed or uncompressed. The image ppi - unknown?
A file size 600 kb and probably 300ppi jpeg's maybe compressed tiff's. Unlikely to get any improvement over importing at 300 ppi.
However, take the PDF origins into account. It will be an image file of some sort wrapped up as a PDF. Newspaper scans, then maybe greyscale rather than colour. The embedded image compressed or uncompressed. The image ppi - unknown?
A file size 600 kb and probably 300ppi jpeg's maybe compressed tiff's. Unlikely to get any improvement over importing at 300 ppi.