Remove old hub page (#2785)

* Remove old hub page

* Update wording

* Reset date

source/_components/image_processing.opencv.markdown

@@ -10,9 +10,44 @@ footer: true
 logo: opencv.png
 ha_category: Image Processing
 featured: false
-ha_release: 0.44
+ha_release: 0.47
 ---
 
-The `opencv` image processing platform allows you to create a standalone image processor without the linked camera entity as mentioned in the [OpenCV page](https://home-assistant.io/components/opencv).
+[OpenCV](http://www.opencv.org) is an open source computer vision image and video processing library.
 
-Please refer to the [component](/components/opencv/) configuration on how to setup the image processor.
+Some pre-defined classifiers can be found here: https://github.com/opencv/opencv/tree/master/data
+
+### {% linkable_title Configuration %}
+
+To setup OpenCV with Home Assistant, add the following section to your `configuration.yaml` file:
+
+```yaml
+# Example configuration.yaml entry
+image_processing:
+  - platform: opencv
+    name: Front Door Faces
+    source:
+      - entity_id: camera.front_door
+    classifier:
+      mom: /path/to/classifier.xml
+```
+
+- **name** (*Required*): The name of the OpenCV image processor.
+- **source** array (*Required*): List of image sources.
+  - **entity_id** (*Required*): A camera entity id to get picture from.
+    - **name** (*Optional*): This parameter allows you to override the name of your `image_processing` entity.
+- **classifier** (*Optional*): Dictionary of name to path to the classifier xml file. If this field is not provided, a face classifier will be downloaded from OpenCV's github repo.
+
+**classifier** may also be defined as a dictionary of names to classifier configurations:
+
+```yaml
+    mom:
+      file: /path/to/classifier/xml
+      neighbors: 4
+      min_size: (40, 40)
+      scale: 1.1f
+```
+
+- **file** (*Required*): The path to the classifier xml file.
+- **scale** (*Optional*): The scale to perform when processing, this is a `float` value that must be greater than or equal to `1.0`, default is `1.1`.
+- **neighbors** (*Optional*): The minimum number of neighbors required for a match, default is `4`. The higher this number, the more picky the matching will be; lower the number, the more false positives you may experience.