Recognition of [0-9]{1,2} - Single or double digit numbers

[Kristians Ositis]

Hello,

Before I dig deeper in the ImproveQuality section, I wanted to check whether someone had tried to recognize images that contains only few characters - in my case a single digit or double digit number. 

In the attachment you'll find 3 images (35x35 pixels) whose recognition I would like to automatize.

Each image contains only one number (1 or 2 digits).

In the beginning I tried to use Capture2Text, which, as I understood, uses Tesseract engine, but unfortunately without positive results - a double digit number gets easily recognized, but a single digit number always gives no output.

Same thing I can say about out-of-box Tesseract engine (installed, no additional configuration was done), which for these images gave me an error: Empty page!!

Would appreciate any help,

Thank you!