Emgu.CV.CvEnum namespace contains all the direct mappings to OpenCV enumerations. An example is given here:
This enumeration shares the same value in OpenCV given here:
Both of them are 16. We can see that each Emgu CV and OpenCV enum type has the same name. That is what direct mapping means. OpenCV programmers will get quick access to Emgu CV because of it. Please see the Emgu CV library documentation for more details.