Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #63159 > unrolled thread

Update image in same window with, say, PIL

Back to article view | Back to comp.lang.python

Contents

  Update image in same window with, say, PIL John O'Hagan <research@johnohagan.com> - 2014-01-05 12:40 +1100

#63159 — Update image in same window with, say, PIL

I'm using something like the following to display an image and refresh
it in the same window each time the image file is updated:

import cv

def display(filename):
    """Display scores as they are created"""
    cv.NamedWindow(filename)
    while 1:
        ... #wait for signal that filename has been updated, 
            #or to break
        image = cv.LoadImage(filename)
        cv.ShowImage(filename, image)
        cv.WaitKey(1000)


I would like to do the same thing using PIL, for two reasons. First,
the main project is written in Python 3, but cv is only available in
Python 2, so I have to launch the above as a separate process and do
IPC with it, which is annoying; whereas PIL has recently come into
Python 3. Second, PIL seems like a more appropriate tool. CV is a
sophisticated computer-vision project which I happen to be more
familiar with, but I'm using it just to display an image, so I feel as
if I'm using the Mars Explorer to vacuum my apartment. 

I have found a couple of StackOverflow and ActiveState recipes to do
this but they all seem to involve great globs of windowing code
involving Tkinter or Qt, which I know nothing about. CV does seem to
magically manage the windowing. Can I do this equally simply with PIL,
or perhaps something else in Python 3?

Thanks,

--

John

[toc] | [standalone]

Back to top | Article view | comp.lang.python

csiph-web