Biometric – Fingerprint

Biometric - Fingerprint

Fingerprint Readers Types

There are 4 types of fingerprint readers that exist today. These are:

  • Capacitive readers, reads fingerprint using capacitors that provides electrical current that forms an image of the fingerprint. It is  expensive than optical readers. Capacitive reader requires a real fingerprint shape rather than only a visual image, but slow in identification compared to optical readers.
  • Optical readers incorporates a sensor that takes a snapshot image of the fingerprint. It is cheaper to implement, however, the disadvantage is impacted by dirty fingers, unable to read the senior citizen fingerprint, and the reader is easier to override.
  • Ultrasound reader is unlike other types of fingerprint readers that acquire an image of the finger surface that requires a clean finger. On ultrasound readers, a high frequency sound waves penetrate the epidermal (outer) layer of the skin to read the fingerprint on the dermal skin layer. This does not require a clean and/or unscarred fingers prior to authentication.eliminates. This is expensive than Optical and capacitive. However, it is difficult to tamper the ultrasound reader.
  • Thermal readers senses the temperature difference between fingerprint ridges and valleys.

Optical Fingerprint Reader

There are 2 types of optical fingerprint reader today and these are:

  • Single Spectral, uses a single spectrum to generate an image in the sensor
  • Multi-Spectral employs multiple reading of fingerprints at different light waves. 

Benefits of Biometric in Access Control and Attendance System

The present time with high tech equipment, the manual authentication method especially in time attendance and access control are now obsolete as it requires more manpower and slow response.

The automated method using biometric technology is the answer to the growing population in the workplace and increasing efficiency but lowering the cost of operation in time-attendance  and access control.

Below are the advantages and disadvantages of implementing a biometric system:


  • Biometric terminals are easy to use
  • Realtime recording of access and time-attendance information
  • Automatic Integration in a time-attendance application
  • Increase security in the workplace
  • Prevent attendance abuse
  • Restrict or grant entry to specific areas
  • Install in multiple locations around your workplace
  • Accessible in a central location
  • Increased authentication using multi-spectral optical technology.
  • Require less manpower to maintain attendance and access to authorized people.
  • Low operational cost

  • Higher start-up cost
  • Requires software
  • Requires skilled personnel to manage the software and the device

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