Detecting text in low quality images

[eng.ahmed....@gmail.com]

I would like to detect text inside low-quality images and space between letters are small, even same letters are joined i.e. captcha style .

Here is an example of an image I failed to detect the exact text inside it using tesseract version 4

The configuration I used is --psm 6 --oem 2  and also --psm 6 --oem 0

Complete command i used is 

tesseract top.png out --psm 6 -- oem 0

How i can achieve my goal.