bytedeco/javacv

How to get the coordinates of the QR code on the picture?

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#1,739 opened on Jan 16, 2022

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Description

=============the code=============== Mat img = opencv_imgcodecs.imread(url);

Console.log("img："+img+" " + img.cols()+" "+img.rows()); WeChatQRCode detector = new WeChatQRCode(); MatVector matVector=new MatVector(); StringVector decoded_info = detector.detectAndDecode(img,matVector);

Console.log("reslut：" + decoded_info.get(0).getString()); ===========end===================

I have used WeChatQRCode to get the QR code information on the picture, but I have tried many methods, but I cannot get the coordinates of the QR code. Can you help me?

Contributor guide

Research direction
The matVector parameter in detectAndDecode likely contains the quadrilateral points of the detected QR code. Check the OpenCV documentation for WeChatQRCode::detectAndDecode to understand how to extract coordinates from the matVector.
Tech stack
java
Domain
backend
Issue type
Research
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
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Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
Java
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70