What technologies should be used when developing a data recognition application?

Question

Java

I need to write a passport data recognition application in Java. I've already tried to write something, but it doesn't work well:
1. preprocessing: grayscale translation, gaussian blur(3*3);
2. used getWords() from Tesseract;
3. tried to sort the received words (rectangles) by fields.
I would like to see a list of technologies and stages of the application, or maybe some finished products with open source. Thank you!

Answer 1

I suspect you need OCR
https://stackabuse.com/tesseract-simple-java-optic...
https://sourceforge.net/projects/javaocr/
https://www.baeldung.com/java-ocr- tesseract
https://www.geeksforgeeks.org/tesseract-ocr-with-j...
google