• For best results, use H5A cameras.

    Note: H5A Fisheye cameras do not support Face Recognition.

  • Ensure the scene is well-lit.
  • Mount the camera so that people in the scene are front-facing and are not looking down. Let the camera angle determine mounting height.
    • For optimal results, tilt the camera up to 30 degrees from horizontal. Shallower angles will produce better results.
    • Mounting heights of 2.8 m (9 ft) or lower typically have a good angle on faces.

    • Note: Given the fixed lens and the steeper angle of the H5A Corner CR2, face matching performance is highly dependent on pose. For matching to occur, a person's face must be facing the direction where the camera is mounted, within 10° from the center of the camera's view.

Match Confidence and Camera Resolution

  • The Match Confidence is how certain the system is that a detected face matches a profile.
    • This determines the balance between false positives and false negatives.
    • By default, Face Watch Lists use a Medium match confidence, but this can be set for watch lists or individual profiles.
  • Position your cameras to capture faces with the minimum pixels on face required. The following table shows how many pixels on face must be captured by H5A cameras to detect a match.
    • Match Confidence Camera Resolution Minimum Pixels on Face Pixels per Meter Pixels per Foot
    High All resolutions 80 457 137
    Medium 6 MP or lower 50 286 86
    8 MP 60 343 103
    Low and Very Low 5 MP or lower 40 229 69
    6 MP 50 286 86
    8 MP 60 343 103
  • Follow the guidelines above are for the best results, but Face Recognition will still work on cameras with more relaxed guidelines.
  • H4A cameras can also be used but will only detect front-facing faces. These cameras only detect and match faces on a 2 MP resolution, regardless of the actual camera resolution. The minimum pixels on face required are 80, 50, and 40 for High, Medium, and Low match confidence respectively.