[libreoffice-users] Re: How does 4.4 compress PDFs so well? Is there a quality problem?

Andrew Douglas Pitonyak wrote
> … i was not aware that you could simply link an image in a PDF document

Ah, the link is only in the ODT file. The image is always embedded within
the PDF.


Andrew Douglas Pitonyak wrote
> > large or small, resized or not.
>
> This may be related to the perceived DPI of the original image as compared
> to the DPI of the created PDF. On export you can choose Lossless
> compressing, JPEG compression, and Reduce image resolution.

I have been looking only at Lossless compression and no reduction of image
resolution. Also, there is absolutely no point ever in taking a PNG image
and making it larger; that should never be done regardless.


Andrew Douglas Pitonyak wrote
> When I look at those three combinations, I expect that no combination
> allows for images to never be modified.

That's exactly what we've found. I think that images should never be
modified when choosing lossless with no change in resolution.


TomD wrote
> Maybe in the release notes?
> http://www.libreoffice.org/download/release-notes/

That doesn't give the release notes for 4.4.0.0. I managed to find the 4.4
release notes:
https://wiki.documentfoundation.org/ReleaseNotes/4.4
But nowhere there does it mention image compression or resolution.


TomD wrote
> Sometimes things get fixed or smoothed out 'by accident' as the devs are
> working hard to clean the code up and remove any vague hint of Java.  Also
> solving 1 bug-report sometimes has a "knock on effect" of accidentally
> fixing other things at the same time.  It's not always worth trying to
> find which weird and obscure use-cases have been fixed in this way but
> it's
> hoped that users might sometimes write in somewhere and let people know.

I'd be happy to write in to let the developers know. I wouldn't know where
to do this, though.

Paddy



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