2 Check Calibration

You can verify calibration is the root cause by using Face 3D mode in the Live View. Set video preview to “Face 3D” as shown to the right. When standing about 1-2 feet from SAFR SCAN, you should see the 3D structure of your face as shown in the left “Correct” image below. If the image appears mostly green or very little structure as shown in the right “Incorrect” image, then the device needs to be recalibrated.

2.1 Check Calibration Procedure

  1. Open SAFR SCAN Web Console
  2. Go to Live View
  3. Change view to "Face 3D"
  4. Move your face to 1 foot in front of display and look directly at display.
  5. You should see a 3D view of a face that looks something like the image on the left below labeled "Correct". If the image looks like the one on the right labeled "Incorrect", an adjustment is needed.

3 Calibration

3.1 Prepare for Calibration

  • Find a location where there is a flat uniform surface that is 4 meters high and 2.5 meters wide.
  • The reader needs to be placed at a height of 5 to 6 feet and the face of the reader MUST BE parallel to the surface (both vertically and horizontally).
  • There should be ambient dim light - not too bright and not pitch black.
    • Use Calibration page (see below) and make sure there are no strong light patterns on the wall.
  • View the Web Console Live View in Visible Spectrum and check the preview - should be uniform and even and not too bright.
    • Turn off the IR and White Light if they are projecting a pattern onto the wall.
  • Mount the reader securely in this location so that it is free of motion.
  • Check it is parallel by carefully measuring the distance of the reader from each corner - given the small distance from center, very precise measurement should be made (± 1/8" or 3mm).
  • Double check there are no obstructions causing an uneven surface and that color of surface is consistent.
    • A small white spot in center below the pattern is expected.

3.2 Open Calibration Page

  1. Log into SAFR SCAN Web Console
  2. Add “&debug=1” to the end of the URL and press enter.
  3. Click on the System tab.
  4. Click on “Calibration” page on the left.

3.3 Calibration procedure

  1. Place smooth, uniform, vertical surface 0.8 meters away from the device large enough to occupy entire visible area.
  2. Make sure surface is parallel to the device glass face plate using leveling tools.
  3. Recheck that distance from the device to the surface is 0.8 meters.
  4. Adjust lighting to achieve dim ambient light.
  5. Start calibration by pressing Calibrate button below.

(lightbulb)If calibration does not resolve the issue or worsens it, you have the option to reset to factory default calibration on the calibration page.

3.4 Saving Calibration

If a device is reset to factory defaults, it will lose its calibration. To avoid this, the calibration must be saved to permanent storage using provided firmware. After performing the action described in this section, the "Reset to factory default" will restore to the newly saved calibration, not the original factory calibration.

  1. Before starting this procedure, take note of the current calibration settings on the Calibration Page (i.e. the settings you wish to persist) as follows:
    1. Log into SAFR SCAN Web Console
    2. Add "&debug=1" to the end of the URL and refresh the page
    3. Go to System > Calibration
    4. Take note of the Factory Calibration Max Contrast and SL Coverage as shown below:
      A screenshot of a black screen Description automatically generated
    5. Go to Update and select "Load update file…".
      1. If SCAN is connected to SAFR Server, perform this action from SAFR Desktop Video Feeds.
    6. Select the Firmware supplied with this article. Make sure to select the firmware for the appropriate model (SC50 or SC100/200).
    7. Perform the update process. When prompted, click update on the following screen. The "RECALIBRATE" version firmware will be automatically selected for you.
      A screenshot of a computer program Description automatically generated
    8. When complete, you will see a dialog as follows. This is normal. The device will reboot.
      A screenshot of a computer error Description automatically generated
  1. Verify Calibration settings were saved as follows:
    1. Log into SAFR SCAN Web Console
    2. Add "&debug=1" to the end of the URL and refresh the page
    3. Go to System > Calibration
    4. Verify the Factory Calibration Max Contrast and SL Coverage are same as observed above.
      A screenshot of a black screen Description automatically generated

3.5 Calibration Before and After Examples

Before Calibration

After Calibration