SETUP OPENCV

open official release site
click windows to download or go to github release page download last release
opencv_download
download opencv-4.5.1-vc14_vc15.exe, extract it
opencv_extract

add java library in folder opencv\build\java, add files below
opencv_java_library

add python opencv library in pip

pip install opencv-contrib-python

reference links:
https://www.pyimagesearch.com/2017/07/10/using-tesseract-ocr-python/
https://www.pyimagesearch.com/2015/11/30/detecting-machine-readable-zones-in-passport-images/
https://github.com/cisco/openh264/releases
https://code.tutsplus.com/tutorials/how-to-build-a-python-bot-that-can-play-web-games–active-11117
https://blog.csdn.net/weixin_43046653/article/details/83277827
https://www.dyclassroom.com/image-processing-project/how-to-convert-a-color-image-into-grayscale-image-in-java
http://www.labbookpages.co.uk/software/imgProc/otsuThreshold.html