Why PyAutoGui LocateOnScreen() only Returns None

Question

Here\'s the code that I\'m trying to run:

import pyautogui
r=pyautogui.locateOnScreen(\'C:\\Users\\David\\Desktop\\index.png\',grayscale=False)
print r


        

Answer 1

I think that the library pyautogui needs several recognition points. For example, Number seven on calculator:

The number seven on the calculator of windows 10. In this format, I´ve got the location on the screen. Thank you for your comments

Answer 2

The first answer was the answer for me.

After doing pip install opencv_python and then modifying my search like below things worked:

button7location = pyautogui.locateOnScreen('1606271188298.png',grayscale=True, confidence=.5)

Thanks!

Answer 3

The locateOnScreen() function returns None if the image wasn't found on the screen. Remember, the match has to be pixel-perfect in order to match it, so be sure to crop index.png to the smallest recognizable size to prevent extra details from ruining your match. Also, make sure the thing you are looking for is not obscured by any other windows on top of it.

Answer 4

My problem was I was trying to take a snip of the calculator button. That must make a different pixel match because I tried every other option in here and nothing was working. I did a print screen then cropped it to the button I wanted and it worked.

Answer 5

It has to be a pixel-perfect match in order to be found. To allow for any sort of deviance you can invoke a confidence parameter.

For example:

loc = pyautogui.locateOnScreen(image, grayscale=True, confidence=.5)

However, in order to use the confidence parameter you have to have opencv_python installed. This is easy to install with pip:

./python -m pip install opencv_python

After that is in place, you should be able to account for minor differences.