Legacy ImageMagick Discussions Archive

Hello

I'm trying to convert a huge amount of tiffs to pdfs.

My Problem: When I do it on Windows with the actual version (6.4.7-8) the resulting pdfs are about same sized or a bit smaller than the tiffs. I was using convert without any options (convert x.tiff x.pdf).

Then I tried to use it on my Linux (Gentoo-2.6.27-r6) and a self compiled imagemagick 6.4.4.6. The resulting pdfs are between 10 and 30 times bigger than the tiffs. I also tried adding -depth 8, same result.

My compile options were:
yes: X bzip2 corefonts djvu jpeg openexr openmp perl png svg tiff truetype xml zlib
no: -doc -fontconfig -fpx -graphviz -gs -hdri -jbig -jpeg2k -lcms -nocxx -q32 -q8 -raw -wmf

Thanks for any ideas

Add -compress zip to your command line to compress your PDF image. You can also choose RLE or JPEG and others.

OK thanks, it's a bit better, but still too big, even if I choose -compress jpeg -quality 1 the files grow from about 50k to 200k and of course the quality at 1 is not so nice.

The source image are mostly drawings of machine parts, so only black lines on white, if this helps to get a solution. And I get this error:

$ convert 3506-06_05.tiff -compress jpeg -quality 1 3506-06.pdf
convert: 3506-06_05.tiff: unknown field with tag 317 (0x13d) encountered. `TIFFReadDirectory'.

Post a URL to one or two of your images so we can download them and determine why they are not compressing properly.

Thanks for the offer. Would be great if you PM me a mail address to send it to, if you don't mind, as I don't have the possibility to upload it somewhere atm. It's a zip of 700k.

I picked a tiff which is originally 42k in size.
- convert on Windows without compress option creates a pdf of 44k
- same convert command on Linux makes a pdf of 1373k
- a convert on Linux with -compress jpeg makes it 1120k and the quality is slightly worse than on Win.

thanks in advance