Hello list
I've trying for a while a "python only" solution to remove white spaces that
Basemap generate to keep the aspect ratio. I found these two threads that
explain the issue better:
http://www.mail-archive.com/matplotlib-users@lists.sourceforge.net/msg14430.html
http://www.mail-archive.com/matplotlib-users@lists.sourceforge.net/msg14262.html
In the past I relied on ImageMagick's "convert" command with the "-trim
white" option for the job. However, just recently I came across with this
other list and a PIL solution:
http://mail.python.org/pipermail/image-sig/2008-July/005092.html
Here is how I'm doing:
savefig('mapa.png', dpi=300)
from PIL import Image
im = Image.open("mapa.png")
def trim(im, border):
from PIL import ImageChops
bg = Image.new(im.mode, im.size, border)
diff = ImageChops.difference(im, bg)
bbox = diff.getbbox()
if bbox:
return im.crop(bbox)
else:
# found no content
raise ValueError("cannot trim; image was empty")
im2=trim(im,'white')
im2.show()
This works and the aspect ratio is preserved, but as you can see, it is not
a very smart implementation. I save and then reload it again...
any suggestions to improve this are welcome.
Also, I have not tried this on figures with labels and annotations.
Thanks for any input.
*****************************************************
Filipe Pires Alvarenga Fernandes
University of Massachusetts Dartmouth
200 Mill Road - Fairhaven, MA
Tel: (508) 910-6381
Email: falvarengafernan...@umassd.edu
ocef...@yahoo.com.br
ocef...@gmail.com
http://ocefpaf.tiddlyspot.com/
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