[OS X TeX] PDF resolution redux

Simon Spiegel simon at simifilm.ch
Wed Aug 10 12:49:48 CEST 2005

On 10.08.2005, at 12:41, Ben Lings wrote:

> On 8/10/05, Simon Spiegel <simon at simifilm.ch> wrote:
>> Hi everybody,
>> there has been some discussion on the subject of the resolution of
>> PDFs created by Pdftex before, but I still have a question. AFAIK
>> pdftex preserves the resolution of included bitmap graphics, while
>> fonts are resolution independendent. So far, so good. I'm currently
>> working on my thesis and have different kind of bitmap graphics, most
>> of them in quite high resolutions. My problem is that the final PDF
>> ends up quite big and many pictures actually have a far deeper
>> resolution than needed. My question: Can I somehow scale down all the
>> included images to the same dpi, let's say that all images don't go
>> over 1200dpi?
> You can use the OS X ColorSync Utility. Open the PDF with this, then
> create a new filter. In the details tab, select Images from the pop-up
> list.  You can then choose to downsample images and to JPEG compress
> them, which will reduce their size by a large amount.
> Not quite what you asked for (can't specify DPI), but a step in the
> right direction!

Thanks. I just realized that my question wasn't put well. What I want  
is to tell Pdf(la)tex to scale down the document. Of course, I could  
downsample the individual images, but I'm looking for a solution  
which would allow to keep one version of the original images and have  
different pdfs created depending on the resolution I need on a  
specific occasion. Let's say a low resolution to put the document on  
the web and a high resolution for printing. So I don't want to  
manipulate the images but have pdftex downsample them.

Simon Spiegel
Mutschellenstr. 97
8038 Zürich

Telephon: ++41 43 535 81 71
Mobophon: ++41 76 459 60 39


"I have never been certain that the moral of the Icarus myth is, as  
is generally accepted, 'don't fly too high', or whether it might also  
be thought of as: 'forget about the wax and feathers, and do a better  
job on the wings." Stanley Kubrick

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