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I am trying to do some automation on Linux, and I can't find a good way to get a pixel value from the screen, given 2 coordinates.

I have this python code:

#!/usr/bin/env python3
import pyautogui
import sys

image = pyautogui.screenshot()
print(str(image.getpixel((int(sys.argv[1]), int(sys.argv[2])))))

How can I do this without taking a screenshot and instead read from the pixel buffer?

If there is a program that someone knows about that can do this (I've heard AutoHotkey on windows can), that would also be helpful, as I'm using shell script (and lots of xdotool) to do the automation.

Blakely North
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  • https://rosettacode.org/wiki/Color_of_a_screen_pixel#Python – Natecat Oct 18 '20 at 23:37
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    Does this answer your question? [How can I grab the color of a pixel on my desktop? (Linux)](https://stackoverflow.com/questions/1605350/how-can-i-grab-the-color-of-a-pixel-on-my-desktop-linux) – gabrielstuff Oct 18 '20 at 23:42
  • you have multiple solutions there: https://stackoverflow.com/a/1605380/632926 – gabrielstuff Oct 18 '20 at 23:42
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    @gabrielstuff thanks, that led me to my eventual solution. The things on that page needed to be re-written for gtk3, but that got me close enough that I could do it. – Blakely North Oct 20 '20 at 08:53

1 Answers1

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The following code, when called like this: ./getColor.py [X coordinate] [Y coordinate], will print the decimal RGB color value of the specified pixel on the screen in the form (R, G, B)

#!/usr/bin/python
import gi, sys
gi.require_version('Gdk', '3.0')
from gi.repository import Gdk
pixbuf = Gdk.pixbuf_get_from_window(Gdk.get_default_root_window(), int(sys.argv[1]), int(sys.argv[2]), 1, 1)
print(tuple(pixbuf.get_pixels()))
Blakely North
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