One workaround is to try converting it to a PIL image first.
For whatever reason, imshow chokes on large arrays, but handles PIL images
of the same array just fine.
However, you'll need to set the colormap and such through PIL, which can be
a bit frustrating if you're unfamiliar with it. Also, you'll quite likely
need to rescale your data if it's a float.
Hope that points you in the right direction, anyway
-Joe
On Wed, Jun 9, 2010 at 1:31 PM, Massimo Di Stefano massimodisa...@gmail.com
wrote:
Hi All,
i need to work with a relative large images 60 mb (single band geotiff
file)
i store it in python as a numpy array using python-gdal,
the array dinension is (7173 X 7924) single band image,
but tring to display it with matshow/imageshow
or other matplotlib functions i have that python freeze itself and is not
able to load the image.
if i use a subset of the image, i 'm able to display it
or at least i hade to reduce its resolution using hacks like :
reduced_array = array[::3,::3]
i don't need full resolution dataset when the image is displaied with a
full zoom out
so the reduction reduced_array = array[::3,::3] is good to show the
complete image
but when i zoom in the image i obviously lost data (less resolution)
what do you use to display large dataset ?
i'm thinking about a piramid with multy array based on the different
zoom levels
.. but maybe this idea is not so cool.
someone already has developed similar code ?
thanks to All for any suggestion!
Regards,
Massimo
--
ThinkGeek and WIRED's GeekDad team up for the Ultimate
GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the
lucky parental unit. See the prize list and enter to win:
http://p.sf.net/sfu/thinkgeek-promo
___
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/matplotlib-users
--
ThinkGeek and WIRED's GeekDad team up for the Ultimate
GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the
lucky parental unit. See the prize list and enter to win:
http://p.sf.net/sfu/thinkgeek-promo___
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/matplotlib-users
