11/1 Notes Chapter 3
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Face Recognition
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What kind of sensors are used?
 * 2D Cameras - Get pixel values, similar to fingerprints - Predominitely used
 * 3D Range scanners
    * Get distance of parts of face (x, y, z)
 * Video

Sensors
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Visible light

Near Infrared (NIR) - can take images in dark, can have ring of NIR leds, can burn if too strong

Thermal - good in dark (better than NIR), no source of light, passive sensor, affected by heat of light