Helge Hafting wrote:
> John Pye wrote:
>> Hi all
>>
>> I would like to know if there's a way I can easily downsample (or
>> 'degrade') images in my LyX document when creating output using
>> pdflatex. I have a mix of PNGs, PDFs, EPS and JPG in my document, but my
>> PDF file is starting to become large and I'm sure there must be some
>> too-high resolution images in there. I found the graphics/degrade
>> package on CTAN but that seems to require that I use ERT for all my
>> images, which I'd rather avoid.
>>
>> If it's not possible from within LyX, perhaps there's a post-processing
>> tool that someone can recommend: one that does the downsampling of a PDF
>> file, without killing my hyperlinks and bookmarks, would be what I'd
>> want.
>>
>> Any suggestions?
>>   
> Just look at the size of your image files. Then, downsample
> the biggest ones. If you want to keep the originals, make new
> filenames for the downsampled files, and change the document
> accordingly.
>

I was looking for an automated approach. For example on Windows, there
is 'PDF Factory' (although I haven't tried it with hyperlinks). So I was
hoping for something similar on Linux.

One reason why an automated approach is needed is that the file can be
big and appear big on the page: it /needs/ to be big. But if it's big
and appears /small/ on the page, then it needs to be downsampled.

Another reason: a LyX document can embed PDFs, SVGs, and I imagine other
'image' files, that can in turn embed bitmaps. One needs a tool that
examines the resulting PDF output, rather than the input files.

Cheers
JP



-- 
John Pye
Department of Mechanical and Manufacturing Engineering
University of New South Wales, Sydney, Australia
http://pye.dyndns.org/

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