Help with opencv

Configuration
1

Hi
I’m brand new to HA, currently running it in a docker on unraid box.

I can’t get opencv to work.
I get this error msg, when putting the following code my configuration file
No opencv library found! Install or compile for your system following instructions here: http://opencv.org/releases.html

image_processing:
  - platform: opencv
    name: cvision
    source:
      - entity_id: camera.mjpeg
    #classifier:
      #mom: /config/tmp/opencv.xml

camera:
  - platform: mjpeg
    name: faraway
    mjpeg_url: http://192.168.0.18:8080/video
  - platform: opencv
    camera: camera.mjeg
    processor: image_processing.cvision
    # Optional Parameters
    name: OpenCV Camera

Does HA docker come with opencv installed or do I still need to install opencv it ?
If I do need to install it, does somebody have a simple guide.