Image processing (#1742)

* Add image_processing

* add to demo

source/_components/image_processing.openalpr_cloud.markdown

@@ -0,0 +1,35 @@
+---
+layout: page
+title: "OpenAlpr Cloud"
+description: "Instructions how to integrate licences plates with OpenAlpr cloud into Home Assistant."
+date: 2017-01-09 00:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: openalpr.png
+ha_category: Image_Processing
+featured: false
+ha_release: 0.36
+---
+
+[OpenAlpr](http://www.openalpr.com/) integration for Home Assistant allows you to process licences plates from a camera. You can use them to open a garage door or trigger any other [automation](https://home-assistant.io/components/automation/).
+
+### {% linkable_title Configuration Home Assistant %}
+
+```yaml
+# Example configuration.yaml entry
+image_processing:
+ - platform: openalpr_cloud
+   region: eu
+   source:
+    - entity_id: camera.garage
+```
+Configuration variables:
+
+- **region** (*Required*): Country or region. List of Supported [value](https://github.com/openalpr/openalpr/tree/master/runtime_data/config).
+- **alpr_bin** (*Optional*): Default `alpr`. The command line tool alpr from OpenAlpr software for local processing.
+- **confidence** (*Optional*): Default 80. The minimum of confidence in percent to process with Home-Assistant.
+- **source** (*Required*):
+  - **entities** (*Required*): A list of device to add in Home-Assistant.
+  - **name** (*Optional*): This parameter allows you to override the name of your openalpr entity.