Export >> export jar file >> main launch configuration >> browse where you want to put it >> copy required library >> Warning not important>> click okay.. Go to where it is. Your not done yet....
copy the opencv >build>java>x68 copy them and put them next to the .jar not inside the lib file...Your program should run now.
Now select all of it and make it into a .zip file now you can submit this to Moodle.