Re: [Matplotlib-users] Is really matplotlib this slooow for displaying images ? (sorry again)

[Arnd B. <arn...@we...>]

Hi Eric,

On Tue, 21 Dec 2004, Eric Emsellem wrote:

> Hi again,
> thanks a lot for the fixing and comments on figimage. This looks much
> much better now. Indeed a local matplotlib user had also pointed
> out to me the time it spent on cmap.
>
> By the way, the problem I have now is that I would like to have a quick
> way of looking at my images (the 1600x1600) but being able to
> size it INTO the actual opened window (so basically this calls for using
> imshow
> and not figimage).

Just a few thoughts:
- you could gain a speed-up by displaying a reduced image,
  e.g. by passing   image_mat[::2,::2]
  which would correspond to a 800x800 image
  (but latest when zooming one would need the full image ;-(.
- maybe you have to code the zooming youself in terms of figimage
  (In particular if you are still aiming at the 20000x20000 case)
- Is it right that from imshow you would only need
  the  """ extent is a data xmin, xmax, ymin, ymax for making image plots
  registered with data plots.  Default is the image dimensions in pixels"""?
  Somehow I would guess that this should not be a part
  which is too slow, so maybe one could do
  something like this (without any interpolation) also for
  figimage.

Not-more-than-0.5-cents-this-time-ly yours,

Arnd