matplotlib-users Mailing List for matplotlib

Dear list,

I would like to display a 2D image in a mplot3d axe in order to combine 
it with a surface3D or a bar3d plot for instance. The effect I am 
looking for is similar to what can be seen in the bottom XY plane of 
http://matplotlib.org/1.4.0/examples/mplot3d/contourf3d_demo2.html, 
except that I would like to have a custom image instead of the filled 
contours.

I googled the subject and found only messages dating at best from 2010. 
These messages mentioned that the imshow() method did not work on a 
mplot3d. Indeed it does not.
The only alternatives offered by the googled answer to my problem were 
to switch to VTK or Mayavi. For one thing, I never managed to install 
VTK on my PC, and I already have other matplotlib figures in my wxpython 
application so I would really like to stick to matplotlib.

Does anyone have pointers as to how I could display a 2D image in 
mplot3d? Do I need to create a new artist in order to replace the 
non-functionning imshow?
I see that patch collections work fine in mplot3D. Would it be feasible 
to load an image and have it displayed as a patch collection (1 patch 
for each pixel)?

Any advice would be highly appreciated,

Fabrice


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On 2014/09/30, 2:41 AM, Jesper Larsen wrote:
> Hi matplotlib users,
>
> Is it possible to disable antialiasing for a colorbar? If not directly
> is it the possible to "postprocess" the axes instance to se antialiasing
> for relevant elements?

The colorbar returns a Colorbar object, the "solids" attribute of which 
is a Quadmesh; so you should be able to execute

cbar.solids.set_antialiased(False)

to turn off antialiasing.  With a bit of testing, however, I am not 
seeing any difference, so I'm not sure what is going on, and I don't 
have time now to investigate.

Eric

>
> The reason I am asking is because I would like to produce a paletted png
> (using PIL) of the colorbar without the risk of removing any important
> colors in the process (in essence the output from matplotlib needs to
> have less than 256 colors for this to work).
>
> Best regards,
> Jesper
>
>
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Hi matplotlib users,

Is it possible to disable antialiasing for a colorbar? If not directly is
it the possible to "postprocess" the axes instance to se antialiasing for
relevant elements?

The reason I am asking is because I would like to produce a paletted png
(using PIL) of the colorbar without the risk of removing any important
colors in the process (in essence the output from matplotlib needs to have
less than 256 colors for this to work).

Best regards,
Jesper