3_8_Input Devices 1

3_8_Input Devices 1

1. Biometrics

   • Definition
     • Biometrics authentication is used in computer science as a form of identification and access control. It is also used to identify individuals in groups that are under surveillance.
   • Purpose
     • The basic premise of biometric authentication is that everyone is unique and an individual can be identified by his or her intrinsic physical or behavioral traits.
   • Advantages
     • It is difficult to forge, it is also more accurate and there will less chance for human error. Another good thing about using biometrics for identificaiton is that modern systems are built and designed to be easy and safe to use.
   • Disadvantages
     • Misusage of personal information will happen if this device is used. It is expensive to implement. The system could also malfunction
   • Two main characteristics
     • Behavioral characteristics: The behavior of a person.
     • Physiological characteristics: The shape or composition of the body.

2. OCR

   • Definition
     • OCR is a fields of research in pattern recognition, artificial intelligence and computer vision
       • OCR is stands for Optical Character Recognition
   • Made and Use of OCR
     • Its primary use is to convert printed materials into text or word processing files that can be easily edited and stores
     • Its made a huge impact on the way information is stored, shared and edited.
   • Design of screen shots
     • Main Screen
     • Hand Written Recognition Screen
     • Scanned Documents Recognition Screen
       • Training Screen

3. Clock in Cards

4. OMR

   • What dose it stand for?
     • Optical Mark Reader
   • Definition
     • System that automatically reads marks made in pencil

5. Sensors

   • Definition
     • A sensor is an object whose purpose is to detect events or changes in its environment, and then provide a corresponding output.
   • Uses
     • Sensors are used to measure physical quantities such as temperature, light, pressure, sound, and humidity. They send signals to the processor.
   • Advantages
     • Reading taken using sensors are more accurate than those taken by humans. Sensors can monitor information constantly. Sensors can respond to information immediately
   • Disadvantages
     • Faulty sensors can give incorrect results. A Sensor Network may require a lot of additional wiring to be installed around the house to allow sensors to work - unless the sensors used are wireless. Using wireless makes sensor devices much more expensive.