Capture Types

Capture Types.

Capture Types. 2.

Fingerprints.

Ink Optical Capacitive Pressure Thermal Ultrasonic.

Oldest type. Old-fashioned technique. Modern special inks don’t leave residues. Manual archiving of paper cards requires space. Paper cards can be lost or destroyed..

Light illuminates the finger and the reflected light forms an image of the fingerprint. Liveness detection is possible..

Uses a camera adapted to capture fingerprints without physical contact..

Uses a beam of light that can cross the skin and is captured on the opposite side. Mitsubishi DT-TP (2005).

Different types and frequencies of light illuminate the finger and the reader captures the reflected light. Polarized and non-polarized lights. Capable of capturing structures below the surface of the finger. Little susceptible to errors due to dirt or skin moisture. HID ® Lumidigm ®.

The electric field between the sensor and the skin is measured. The greater distance from the valleys reveals the shape of the fingerprint. Fingerprints FPC 1020.

Capacitive layer that when stimulated activates a photosensitive layer to perform the capture. Integrated Biometrics Sherlock.

Finger pressure on a piezoelectric material produces current that is picked up by a sensor..

Microscopic electromechanical devices detect when your finger touches them..

Piezoelectric crystals activate LED nanowires that light up. The spatial resolution of these wires is 2.7 micrometers, resulting in a resolution of 6350 DPI. There is still no commercial use..

Analogous to the capacitive, it calculates the temperature difference between points on the skin, forming the fingerprint..

Uses ultrasound emission and detection to capture fingerprints..

Facecam Placeholder. Ultra-thin ultrasonic sensor that can be placed under the smartphone screen. Samsung Galaxy S10 (2019), S20 (2020).

77% larger fingerprint reader area 50% faster Blood flow detection Samsung Galaxy S21 (2021).

Palm Veins.

A beam of near-infrared (NIR) light illuminates the hand. NIR light is absorbed by the blood in the veins. It is not necessary to touch the sensor..

Face.

Simpler captures Inexpensive Portable Built-in microphone Do not have flash.

High fidelity and high resolution Great parameter control Built-in flash Built-in microphone Expensive.

Public spaces and crowds High resolution Trajectory recognition Expensive (surveillance system).

Iris.

Single iris capture Capturing distance: 5/15 cm Iritech MK 2120U.

Dual iris capture, one at a time Capturing distance: ~15 cm Crossmatch I Scan 2.

Dual iris capture, at once Capturing distance: ~15 cm Unsuitable for cross-eyed people Iritech BK 2121U.

Voice.

Already optimized for the frequency range of the human voice..

Mobile Devices.

First laptop with an integrated fingerprint reader . Considered a landmark for security in the PC industry..

First smartphone with an integrated fingerprint reader . Increased processing capacity and memory . Dock for a desktop-like experience..

Android 4.0 – Ice Cream Sandwich Facial recognition to unlock phones Security Issues.

Touch ID : integrated fingerprint reader with liveness detection. Popularized the use of fingerprints for everyday authentication. Apple-owned technology, after the acquisition of AuthenTec..

Facecam Placeholder. Technology developed by Synaptics Plain fingerprints Samsung Galaxy S5 Unlock the phone and authenticate purchases.

Lumia 950 and 950 XL: Iris Scanner . Infrared LEDs to illuminate the eyes. Infrared front camera to capture the iris image. Iris images are not stored ..

Facecam Placeholder. Face ID : Facial recognition based on specific hardware. TrueDepth camera system: Infrared dot projector (30,000 dots) Infrared camera 3D map of the face A11 Bionic Neural Engine.

First smartphone with an ultrasonic fingerprint reader . Fingerprint reader under the screen . Better capture quality and tolerance to dirty/wet fingers..

Facecam Placeholder. Important role in popularizing the use of biometrics . Integrated devices don’t provide the fingerprint image to the system , they only respond to authentication requests with “match” or “not match”..