globally turn of anti-aliasing for png

Community matplotlib-users
1

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

2

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

···

On Tue, May 19, 2009 at 3:57 AM, Thomas Pfaff <yael@...361...> 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?

3

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

···

On Tue, May 19, 2009 at 3:57 AM, Thomas Pfaff <yael@...361...> wrote:

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

--
Christopher Barker, Ph.D.
Oceanographer

Emergency Response Division
NOAA/NOS/OR&R (206) 526-6959 voice
7600 Sand Point Way NE (206) 526-6329 fax
Seattle, WA 98115 (206) 526-6317 main reception

Chris.Barker@...259...