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# OpenCV plugin {#opencvlux_plugin}
[TOC]
# OpenCV "lux" plugin
Version: @PROJECT_VERSION@
# Introduction {#opencv_intro}
This plugin simulates the ExteriorBrigtness property using a traditional webcamera. It works
by taking the mean pixel intensity of the web camera image and estimating lux. The particular
can be calibrated using the "pixelUpperBound" and "pixelLowerBound" variables.
# Setup {#opencv_setup}
To enable the OpenCV "lux" plugin, run cmake and enable the opencvlux_plugin option:
cmake -Dopencvlux_plugin=On ..
Currently, this plugin has been tested with OpenCV 2.4.4.
To use the OpenCV plugin, add the following to the "sources" array in /etc/ambd/config:
~~~~~~~~~~~~~{.js}
{
"name" : "OpenCV LUX",
"path" : "@PLUGIN_INSTALL_PATH@/opencvluxplugin.so",
"threaded" : "true",
"pixelLowerBound" : "0",
"pixelUpperBound" : "255",
"fps" : "30",
"opencl" : "false",
"device" : "0"
}
~~~~~~~~~~~~~
**NOTE:** some features require the qtmainloop to be running. see the main README for details.
# Configuration Key Definitions: {#opencv_config_keys}
| Key | Definition | Default Value |
| :---------------- | :---------------------------------------------------------------------- | :----------------- |
| "name" | Name of plugin. This key is not used by the plugin at this moment | |
| "path" | Path to plugin on the filesystem | |
| "device" | Camera to use. The string "0" corrisponds to /dev/video0 | "0" |
| "threaded" | Compute pixel intensity in another thread. Set to "true" or "false" | "false" |
| "fps" | How many times per second to poll image data from the camera. | "30" |
| "opencl" | (experimental) Use a specialized CPU/GPU device to help with processing | "false" |
| "logging" | Turn on video logging. | "false" |
| "logfile" | File to encode video to. | "/tmp/video.avi" |
| "codec" | Fourcc name of codec. See <http://www.fourcc.org/codecs.php> | "mjpg" |
| "ddd" | (experimental) Driver Drowsiness Detection with a driver facing camera detect whether or not eyes are open or closed. If closed for a period </br> of time, DriverDrowsiness will change to "true". | "false" |
# AMB Properties: {#opencv_amb_properties}
| Property Name | Description | Type | Access |
| :---------------- | :---------------------------------------------------------------------- | :------: | :-------- |
| VideoLogging | Turn on and off video logging | bool | readwrite |
| DriverDrowsiness | True if the driver has been detected drowsy. | bool | readonly |
| OpenCL | True if OpenCL acceleration is enabled. | bool | readwrite |
|
