How can I extract an rectangle from an uploaded image in Java Netbeans? What technique should I use?

16 March 2019 1 8K Report

I am going to build a ANPR software using Java later. Thank you.

Try using the OpenCV library.

https://opencv.org/

First detect edges, then extract lines. If you have the lines, search for two pairs of parallel pairs, being perpendicular to each other. (Also check that their endpoints are matching).

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