Enhanced vision system

This System also called "Enhanced flight vision system".

This is an airborne system which provides an image of the frontal view and displays it to the pilot, in order to provide an image in which the scenery and objects in it can be better detected. 
In other words, an EVS is a system which provides the pilot with an image which is Better than ordinary human vision.
An EVS includes imaging sensors (one or many) such as a color camera, infrared camera or radar, and typically a display for the pilot, which can be a head-mounted display or head-up display.
An EVS can be mounted on military or civilian aircraft, fixed wing (airplane) or rotary wing (helicopter).