Emgu CV is a cross platform .Net wrapper to the OpenCV image processing library.
Please check out our release note: http://www.emgu.com/wiki/index.php/Version_History#Emgu.CV-4.3.0
Documentation can be found here: http://www.emgu.com/wiki/files/4.3.0/document
Please check out our release note: http://www.emgu.com/wiki/index.php/Version_History#Emgu.CV-4.2.0
Documentation can be found here: http://www.emgu.com/wiki/files/4.2.0/document
Please check out our release note: http://www.emgu.com/wiki/index.php/Version_History#Emgu.CV-4.1.1
Documentation can be found here: http://www.emgu.com/wiki/files/4.1.1/document/html/8dee1f02-8c8a-4e37-87f4-05e10c39f27d.htm
Please check out our release note: http://www.emgu.com/wiki/index.php/Version_History#Emgu.CV-4.1.0
Documentation can be found here: http://www.emgu.com/wiki/files/4.1.0/document/html/8dee1f02-8c8a-4e37-87f4-05e10c39f27d.htm
Please check out our release note: http://www.emgu.com/wiki/index.php/Version_History#Emgu.CV-4.0.1
Documentation can be found here: http://www.emgu.com/wiki/files/4.0.1/document/html/8dee1f02-8c8a-4e37-87f4-05e10c39f27d.htm
Release note can be found here: http://www.emgu.com/wiki/index.php/Version_History#Emgu.CV-3.4.3
Documentation can be found here: http://www.emgu.com/wiki/files/3.4.1/document/html/8dee1f02-8c8a-4e37-87f4-05e10c39f27d.htm