PhotoImage.paste
Peter Otten
__peter__ at web.de
Tue Jan 24 11:59:05 EST 2017
rryan.asu at gmail.com wrote:
> I'm trying to build a tkinter GUI with python 3.5, and would like to
> interactively adjust the color palette for an image by moving the mouse in
> the canvas using PIL. In pseudo-code, I have something like
>
> palette=color_map(x,y) # x,y are scalars indicating the position of the
> mouse in the Canvas image.putpalette(palette)
> photo.paste(image)
>
> This works just fine, but is very slow. The photo.paste(image) step takes
> about 0.15 s (using an image that is 4k x 4k). I read the manual on
> effbot, and they caution that the paste method would be slow if the image
> is display --- and I'm guessing that's what I'm doing.
So you have read
"""
Note: Pasting into an RGBA image that is displayed is a very slow operation.
It’s usually better to create a new image object.
"""
on <http://effbot.org/imagingbook/imagetk.htm>.
> So my question is, what alternatives do I have to speed that step up.
Did you try to create a new image, as the note suggests?
> Thank you for any thoughts you might have...
> -Russell
More information about the Python-list
mailing list