Recognizing numbers

Hi guys, OpenCV beginner here,
I would like to be able to recognize the numbers on this image :

Would it be possible using just OpenCV ?
I also saw that i could use Tesseract - OCR but maybe you guys can suggest me another approach to this problem ?

see opencv/ at master · opencv/opencv · GitHub

i think it is not a hard task for an experienced openCV user.
could you provide some more example images.