ID Card OCR Project Using JavaCPP, OpenCV, and Tess4j
This article describes a Java-based ID card number recognition project that integrates Tess4j with JavaCPP to leverage OpenCV functionality without requiring a separate OpenCV installation, outlines required software, troubleshooting steps, recent updates, and provides the project repository link.
The project integrates Tess4j with JavaCPP to perform ID card number recognition without needing a separate OpenCV installation, reconstructing the entire workflow by loading required C++ libraries via JavaCPP.
A runtime error (java.lang.UnsatisfiedLinkError) occurred due to missing C++ runtime libraries; the issue was resolved by installing the 64‑bit VC redistributable (vc_redist.x64.exe) in the img directory.
The recognition service is accessible at http://localhost:8080/idCard/index , built on the open‑source OpenCV library, written in Java, and achieves over 90% accuracy on clear images for ID card numbers.
Required Software
Windows 7 64‑bit
JDK 1.8.0_45
JUnit 4
OpenCV 4.3
JavaCPP 1.5.3
Tess4j 4.5.1
Tesseract 4.0.0
Project Updates
Replaced base64 image upload with WebUploader chunked upload to improve speed, especially on paid browsers; the original page is now idcard_bak.html .
Unified image save paths into a configuration document.
Upgraded OpenCV from 3.4.3 to 4.3.
Project Repository
https://gitee.com/endlesshh/idCardCv
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