PD Measurement limitations

User limits of PD Measurement usage

Some points are important for a successful experiment: 
  • Card must be in standard format with no transparent plastic edges (e.g. NIE)
  • Follow the complete protocol: 
    - put the phone down on a stable environment
    - appropriate lighting conditions, no under & over exposure
    - hair tied back, face unobstructed
  • Avoid movement to get a clear picture
  • Sufficient and stable internet access
  • Access to front camera