CHAPTER 3: INPUT DEVICES
INPUT DEVICES
1. Digital Camera
A digital camera can be used to take pictures. It can be used with a computer to transfer the pictures from the camera to the computer. We can save these images where ever we want can be a Computer disk, CD, USB drive or can transfer from one computer to other computer or device.
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| Digital Camera |
2. Web cam
A Web cam is a tiny digital video camera that usually fitted in the body of laptop computers. People use Web cams for videoconferencing and to send live images over the Internet.
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| Webcam |
A scanner is used to copy pictures and documents or other things and save them as files on the computer. A scanner is similar to a photocopier, except that instead of producing a paper copy of the document you place on it, you get an electronic copy which appears on your computer screen. This is very important input device use to convert a hard-copy file (printed paper) to a soft-copy (image or display file).
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| Digital Scanner |
4. Bio-metric Devices
A bio-metric device is any device that measures a biological function or characteristic. It identifies persons seeking access to a computing system by determining their physical characteristics through fingerprints, voice recognition, retina patterns, pictures, face recognition etc...
a. Voice Recognition
Voice input is inputting spoken words and converting them to digital form is typically performed via a microphone or headset. It can be used in conjunction with sound recorder software to store the voice in an audio file.
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| Voice Recognition |
b. Thumb Impression
Bio-metrics can be defined as an automatic method for identification or identity verification of individuals using physiological characteristics.
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| Thumb Impression |
c. Signature Verification System
Digital signature unit capture and save signatures as people sign on the LCD touch screens. These signatures can be saved for use to electronically sign documents, customer signature verification for employee authentication.
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| Signature Verification |
d. Retina Scanner
Retina scanner is used to map the unique patterns of a person's retina. It uses the unique patterns on a person's retina to identify them.
It is used for authentication and identification purposes. Retinal scanning has been utilized by several government agencies including the FBI, CIA, and NASA.
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| Retina Scanner |
e. Face recognition
An ability to recognize people by their facial characteristics. The most advanced technology, which maps the characteristics of a person's face. The computer can differentiate the same person with different appearances; for example, with or without glasses and change of hair style.
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| Face Recognition |
4. MIC/Headphone
Both are input devices which are related to audio input. These devices are used to enter sound in to the system for processing. It can be used in chatting, conferencing call and music.
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| MIC/Headphone |
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