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Re: [Dvipng] Higher quality (smooth) PNGs?


From: U Avalos
Subject: Re: [Dvipng] Higher quality (smooth) PNGs?
Date: Tue, 17 Aug 2010 11:12:05 -0400

Sorry for the delay. 

A quick test shows no noticeable change in quality. In fact, the resulting 
images look the same.

I created two sets of images, one using the "usual" switches and another using 
the "truecolor" switch.

On the computer screen, both latex fragments look the same.

I then converted the files to PDFs and printed them. Again, both latex 
fragments look the same.

If there's a difference, I can't spot it.

On Thu, 12 Aug 2010 13:22:22 +0200
Jan-Åke Larsson <address@hidden> wrote:

> A closer look shows that certain programs used to display the images (I
> use different programs on different machines) do not handle
> alpha-channel antialiasing in palette images. Bad. Probably this is what
> affects your printer as well.
> 
> I'll think about this but it is likely that the default behaviour of
> dvipng will change: Alpha-channel antialiasing (~full alpha
> transparency) will force truecolor output, much as image inclusion does
> already.
> 
> So do use the --truecolor switch for now, that should solve your problem.
> 
> 
> Best
> /JÅ
> 
> 
> 
> On 2010-08-12 11:52, Jan-Åke Larsson wrote:
> > Hi,
> > I have been looking closer at this, and on one machine, I have noticed
> > that palette images from dvipng does not use antialiasing. Perhaps this
> > is your problem. In that case, try adding
> > 
> >   --truecolor
> > 
> > to your dvipng call. This would produce antialiased images even on that
> > machine. I will investigate the reason for this behavior and return as
> > soon as I can.
> > 
> > /JÅ


-- 
--Thanks!
Uriel



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