How feasible is the idea and is it feasible at all?

Question

Database

Good day. How can I implement, let's say I have two identical pictures with different encrypted text. And how to make our database determine exactly the picture that I need from this hidden text?

Answer 1

The DBMS does not deal with image recognition. She can keep them.
If you are thinking about protecting against bots through the use of CAPTCHA, then here are some articles on the topic (examples in C#):
Simple CAPTCHA, Create your own in C#
Captcha in an ASP.NET
PS Application For PHP: Developing a CAPTCHA with your own hands