I have an image that is really blurred and I wanted to know if there were any method to get the text of a low quality picture ?
A simple, effective and ethical method exists to get the text from THAT specific low quality image: pay the publisher the fee.
There is nothing you can extract form that image. Too few pixel to work with sorry. Real life isn't like CSI or Blade runner.
It's not only low quality, I think it's intentionally selected low resolution to make possible to see the general layout, but not to read the content. So, if you find a way to read it you should also pay to the publisher what he wants. He obviously has stated a price for reading it.
No sharpening cannot restore the text, but the recovery can be based on the fact that it's text and has a certain font and size. In addition the text is written in certain language. That should give some basement to guess which words has been written. I can give a simple example:
On the top I have two words written in not so high resolution. Those words are Auto and Home.
BTW. Just in case you need higher resolution to recognize common fonts, the used font is Bodoni MT.
The three darker patterns are comparisons with blending mode difference. Auto vs Auto and Home Vs Home of course both give difference = 0, but the average pixel brightness difference is about 50 (or as well 20%) in Auto Vs Home. Maximum would be 255, if there was a negative.
Actually computer vision does the same, but with more developed calculation algorithms. It makes comparisons with all known detectables and decides the most probable cause of the seen blurred patterns. It isn't only in movies or crime investigation tv series, but in real life. For ex. the security provider of a jewelry shop is alarmed as soon as the face recognition machine sees some well known (=police familiar) person walking around. In the same way the police recognizes interesting (=wanted or non-existent) car license plates routinely.
The applications are numerous in science, business, intelligence, surveillance, robotics, weaponry, probably more various than I can imagine. Of course the cost also is astronomic, but those who want the best do not start by asking the price.
Unfortunately I have no guidance to give how ordinary people could get such sophisticated pattern matching software nor does it be capable enough for your case. If you don't find it or it happens to be too ineffective, you can use the alternative reading method which already is suggested by others.