python fast ocr

I need help to make a simple and fast ocr in python. I have tried easyocr and tesseract. However easyocr is howfully slow (>1 hour) and the other doesn't work at all (compatibility between libraries ?), I need to identify very simple images one (gain) contaning 2 values between 0 and 100, one (scale) contaning 1 value (1,2,3,4,5,6,7,8,9,10,12). sample of the pictures are attached. my actual code is also attached with a sample picture. I need to have a result in less than 1 second, 0.1 second would be perfect.
I am using tensorflow in other project, it may be a simple way to work (https://www.tensorflow.org/lite/examples/optical_character_recognition/overview) however I have few time and need support to achieve this in few days