Legacy ImageMagick Discussions Archive

OK, I have finally figured out what helps: I have added -bordercolor white -border 0 -alpha off to the command line and there we go: fine result!

NicolasRobidoux wrote:With text, use PNG. With pngcrush if you want to squeeze out every little bit. Make sure you get a PNG8 out of this, and strip.
JPEG is very ill-suited for text.

The converted files are subsequently used in an accounting software which can handle jpgs only...

By "updated", do you mean that you did not do a clean reinstall? Despite the best intentions of the the Ubuntu devs, me and my grad students have not found this to be a 100% pain-free way of moving to a more recent version of Ubuntu. (No clue if this applies to 12.04 from, I hope, a fully updated ...

convert -density 150 -colorspace gray '/path/file.pdf' -flatten -quality 85 '/path/file.jpg'

Thanks: The "flatten" parameter somehow drastically improves the quality of text on white background (which was the major issue)!

The second suggestion produces even better quality, however the decoding ...

Thx for your reply:

Your images aren't visible (just the word "Image" appears in your message).
Can you post them (along with the pdf) on a web page somewhere?

OK, the jpgs should be visible now. Posting the pdf file is useless: it happens with all pdf files regardless of the source.


Were ...

I have recently updated from Ubuntu 11.10 to Ubuntu 12.04. Since then, a 'convert' script which I have used for years suddenly started producing worse quality (jagged edges, no dithering anymore?).

Here's the script:
convert -density 150 '/path/file.pdf' -colorspace Gray -strip -quality 85 '/path ...