Legacy ImageMagick Discussions Archive

Hello,

I'm trying to take a merged tiff from a scanner and turn it into a PDF.

This works great with mono (fax) formats, however when I have a merged multi page tiff which has some color (Group 4) scanned pages, and some mono (fax) pages inside, I am receiving HUGE pdfs.

A 2.6mb tif becomes nearly 7mb.

I've tried a convert while reducing the quality with jpg compression (down to 65%), but of course this is very lossy.

Is there any way to keep the size roughly the same while converting to PDF?

Thanks for any help in advance.

If helpful, here's one of the many, many offending files: http://www.terravexo.com/x.rar

Also, as per the "Read me first" article, version is: Version: ImageMagick 6.8.9-9 Q16 x86_64 2015-01-05

I'm on Linux (Debian)

Your supplied tiff contains images compressed with either JPEG or Group4. I don't know what compression options IM has for writing PDF files, but I don't think it allows different images to have different compression methods.

Thanks snibgo,

I did suspect this was the real issue.

Does anyone know of any kind of workaround?

I know it doesn't compare, but Adobe Pro is generating PDFs at the same size as the tiff. While I understand that's propitiatory software, and they own the PDF format, I was kinda hoping someone else might have had the same issue and found a viable workaround.

A utility such as tiff2pdf may simply put a pdf wrapper around the images.