Documentation

If the Android device running Slideshow app has a camera, it can be used for detecting how many people are currently in the area in front of the camera. This number can be used for estimating how many people can see what is on the screen at the moment and for further analytical and statistical purposes.

If you would like to further integrate the face detection feature with an external system, please contact us.

Setup

Following steps are needed for enabling face detection:

  1. On-screen menu – Basic settings – Request camera permissions – allow Slideshow to access the camera on the Android device. If this option is missing from the Basic settings, the permission has been already granted and it is not necessary to grant it again.
  2. Web interface – menu Settings – Device settings – select input camera under Camera for face detection and setup other options if needed.
  3. Reload Slideshow app in order to apply the settings.
  4. Wait 10 seconds after startup, navigate to web interface – menu Home – click on Number of faces detected in the last frame link to check whether the camera image is correct.

      Usage

      The result of the face detection can be seen on the Home page of the web interface. If the face detection is active, Face detection widget containing statistics will be displayed. By clicking on the Number of faces link detected in the last frame you can check the last processed image from the camera. All detected faces together with their tracking IDs are marked in red.

      Face detection can’t be used at the same time as video input from the same camera, as two processes can’t use the same camera at the same time.