[pdftex] Image transparency

[Prof Brian D Ripley]

On Thu, 21 Jun 2001, Hans Hagen wrote:

> At 01:08 AM 6/21/01 +0100, Sebastian Rahtz wrote:
> >Wendy McKay writes:
> > > I use very basic pdftex with pdf figures and  none of the fancy
> >
> >very good! PDF images are better than PNG anyway!
>
> eh ... you mean outlines, bitmaps in pdf are just png/jpg/tif compressed so
> they should be of similar quality then their original
>
> but, .. you're quite right [as always] about being better since inclusion
> of a png converted to pdf is much faster, so what we do here is convert the
> png's into pdf [using pdftex] and then including them as pdf.

I have seen several examples where direct inclusion of png works, and after
conversion to pdf, pdftex crashed during inclusion.  I don't know if this
is resolved in the latest pdftex, as I learnt from the problems to prefer
png for large images.  (They were all highly detailed screen shots of 0.5
MegaPixel (as digicams say) or more.)

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595