I have got a PDF document containing a red font which I want to replace by a black font.
I tried the following command according to this answer:
convert -density 300 doc.pdf -fill black -opaque "#e1342d" -fuzz 60% output.pdf
I received the specific color by selecting a pixel's color from the following screenshot I took:
(→ jsFiddle containing the original image)
Unfortunately, the document is still the same after converting. I think I misused the
The distance can be in absolute intensity units or, by appending % as a percentage of the maximum possible intensity (255, 65535, or 4294967295).
— ImageMagick command-line documentation
I've tried 0%, 10%, 20%, ... 100%, but none worked.
I wanted to verify that Imagick actually loads and converts the PDF:
convert -density 300 doc.pdf -fill black +opaque red output.pdf
Funnily enough, this outputs a completely white PDF (note that the page count was preserved).
The command below outputs a completely yellow PDF.
convert -density 300 doc.pdf -fill blue +opaque blue output.pdf
- Ubuntu 13.10 64-bit
- ImageMagick 6.7.7-10 2013-09-10 Q16
- Ghostscript 9.10