How can I compare a text input to text converted from an image using an OCR API?

I get a “null” value every time I take a photo of a license plate. For example, this one:

But honestly, that doesn’t even matter because the OCR API you’re using is not high quality enough to recognize license plates consistently.

I discuss that in a long thread linked from this post: Displaying the texts from the picture similar to the one from the textbox - #4 by tatiang.

The bottom line is that if you want to do license plate recognition, you’re going to have to pay for a better OCR API. I spent a lot of time trying to do what you’re doing with the same free API that you’re using so that I could help the users in those two topics. But I’m sorry to say that the free API you’re using is not worth your time.