home-assistant.io/source/_components/image_processing.openalpr_local.markdown

layout	title	description	date	sidebar	comments	sharing	footer	logo	ha_category	featured	ha_release	redirect_from
page	OpenALPR Local	Instructions on how to integrate licences plates with OpenALPR local into Home Assistant.	2017-01-09 00:00	true	false	true	true	openalpr.png	Image Processing	false	0.36	/components/openalpr/

OpenALPR 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.

For using the result inside an automation rule, take a look at the component page.

{% linkable_title Local installation %}

If you want process all data locally, you need version 2.3.1 or higher of the alpr commandline tool.

If you don't find binaries for your distribution you can compile from source. Documentation of how to build OpenALPR is found here.

On a Debian system you can use this cmake command to build only the command line tool:

$ cmake -DWITH_TEST=FALSE -DWITH_BINDING_JAVA=FALSE --DWITH_BINDING_PYTHON=FALSE \
  --DWITH_BINDING_GO=FALSE -DWITH_DAEMON=FALSE -DCMAKE_INSTALL_PREFIX:PATH=/usr ..

For other operating system please refer to the OpenALPR wiki.

Verify your alpr installation with:

$ wget -O- -q http://plates.openalpr.com/h786poj.jpg | alpr -

{% linkable_title Configuration %}

# Example configuration.yaml entry
image_processing:
 - platform: openalpr_local
   region: eu
   source:
    - entity_id: camera.garage

{% configuration %} region: description: Country or region. List of supported values. required: true type: string alpr_bin: description: The command line tool alpr from OpenALPR software for local processing. required: false type: string default: alpr confidence: description: The minimum of confidence in percent to process with Home Assistant. required: false type: integer default: 80 source: description: List of image sources. required: true type: list keys: entity_id: description: A camera entity id to get picture from. required: true type: string name: description: This parameter allows you to override the name of your OpenALPR entity. required: false type: string {% endconfiguration %}