This demo illustrates how to reuse simple pieces from the Ubuntu distribution to detect and count the number of people stopping by at a booth. It has as well a demo-scripts/ directory which contains script to reinstall, update and rollback to show up the rollback mecanism.

You need a webcam attached to your snappy device to try this demo out.

sudo snap install face-detection-demo --devmode

The service will start automatically and you can head over to http://localhost:8042 to get your camera starts counting persons through face detection.

You will see there a graph updating automatically every 10s with the new data and showing off the last photo where someone was detected.

Some settings are available for you to tweak. You need to create a settings file in $SNAP_DATA before the service exits. Note that the reinstall scripts does this if you set the settings file next to it before executing.

The settings file itself is a yaml format configuration, which can contain:

facedetection:
  webserver-port: 8042
  interval-shots: 10

webserver-port enable changing the ports where the web server listen at. interval-shots is the interval between 2 shots in seconds.