Detect text on buttons

[Rizvan Ferdous]

I am trying to detect text on buttons so that I can get their location and use pyautogui to click the button automatically. But the buttons' text returned by tesseract is not even close.

It  know tesseract has issues with light text on dark background, so I have tried inverting the color (after some post-processing) 

However, this hasn't helped either. The result includes "ro" where the "Finish" button is, and it didn't even find the "Cancel" button or the verify buttons. 

However, when the button is big enough, or the button text is long enough, or even when the image is cropped to exclude one edge of the buttons, it works fine. 

I am using: oem:1, psm:6
I've tried all psm modes. Is there a better workaround than to crop the image? Because different browsers load the buttons differently. So if I were to write a script that's browser independent, cropping for every single browser wouldn't be efficient. 

I'm using tesseract 4.0 on Mac