According to I already have the Emgu.CV libraries added in the root folder of the project, but when I compile it sends me the following error: As if the libraries were not added ... see photo. 
This is the image of the added references:
the using ones that I use are:
Here the root folder:
If someone has it please comment ...
After a while looking for an answer to this error, the problem was the version of the libraries, since I installed the most recent one.
Asking in facebook groups someone recommended me to download previous versions since the most recent tend to have some faults, proceeded to download previous versions and copy all the necessary files back to the root folder of the project
compile the project and I worked correctly.
In case some person has the same problem or something similar, it is what I did to solve it.
: D