matplotlib-users

[Matplotlib-users] globally turn of anti-aliasing for png

[Thomas P. <ya...@gm...>]

Hi all,

 

Is there a way to completely turn of anti-aliasing when saving to png?

 

I want to put graphs into a PowerPoint Presentation but there, anti-aliased
png-graphics look blurry.

I found how to turn anti-aliasing off for lines, but texts and axes are
still anti-aliased.

Is there a way to do that?

 

Thanks

 

 

Thomas

Re: [Matplotlib-users] globally turn of anti-aliasing for png

[John H. <jd...@gm...>]

On Tue, May 19, 2009 at 3:57 AM, Thomas Pfaff <ya...@gm...> wrote:
> Hi all,
>
>
>
> Is there a way to completely turn of anti-aliasing when saving to png?
>
>
>
> I want to put graphs into a PowerPoint Presentation but there, anti-aliased
> png-graphics look blurry.
>
> I found how to turn anti-aliasing off for lines, but texts and axes are
> still anti-aliased.
>
> Is there a way to do that?

You could use the findobj function to recursively find any object in
the figure with an "antialiased" method (though the Text objects do
not currently have such a method).  This would at least get you the
lines, rectangles and polygons

  http://matplotlib.sourceforge.net/examples/pylab_examples/findobj_demo.html

  http://matplotlib.sourceforge.net/api/artist_api.html#matplotlib.artist.Artist.findobj


Eg::

  def has_aa(x):
      return hasattr(x, 'set_antialiased')

  for o in fig.findobj(has_aa):
      o.set_antialiased(False)


JDH

Re: [Matplotlib-users] globally turn of anti-aliasing for png

[Christopher B. <Chr...@no...>]

> On Tue, May 19, 2009 at 3:57 AM, Thomas Pfaff <ya...@gm...> wrote:
>> I want to put graphs into a PowerPoint Presentation but there, anti-aliased
>> png-graphics look blurry.

I have had issues with alpha PNGs in PP, but I think if you play with 
the resolution, you should be able to get something that looks good, and 
it'll be easier than trying to turn anti-aliasing off everywhere.

http://www.scipy.org/Cookbook/Matplotlib/AdjustingImageSize

-Chris

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