- Describe various types of pen input, and identify other types of input for smart phones.
Light Pen is actually one more pointing input gadget. This will pick up on existence of light. It's a hand held pen fashioned gadget having a photocell installed in its front-end. This kind of instrument also offers a button. Light pen can be used on PDA's and also other kinds of portable computers.
Digitizer is also called a graphic tablet and uses a pen input device. It's a flat, rectangle-shaped digital plastic material pad.
Stylus and Cursor is actually like a ballpoint pen. It's utilized to compose textual content or make lines (or generate drawings and also pictures) on the exclusively developed graphics display or digitizer.
Digital Pen is an input device found in several sophisticated graphic devices. Generally electronic digital pen supplies much more performance compared to stylus pen.
- The purpose of various game controllers: game pads, joysticks and wheels, light guns, dance pads, and motion-sensing game controllers.
Game pad is a pointing device that controls the movement and actions of players or objects in games.
Joystick is vertical lever mounted on a base.
Wheel is steering-wheel-type input device.
Light gun is a pointing device for computers and a control device for arcade and video games.
Dance pad, also known as a dance mat, dance platform, or jitter deck, is a flat electronic game controller used for input in dance games.
Motion-sensing game controller is a device used with games or entertainment systems used to control a playable character or object, or otherwise provide input in a computer game.
- Explain how resolution affects the quality of a picture captured on a
digital camera.
Resolution is the sharpness and clarity of image. The higher the resolution, the better the image quality. Thus, a picture captured on a digital camera with a low resolution has a poor quality.
- Describe the uses of voice recognition, web cams, and video conferencing.
Voice recognition is sometimes used to refer to recognition systems that must be trained to a particular speaker—as is the case for most desktop recognition software.
Web cams is a video camera which feeds its images in real time to a computer or computer network, often via USB, ethernet or Wi-Fi.
In video conferencing, two or more geographically separated people who use network or Internet to transmit audio and video data.
- Discuss how various scanners and reading devices work: optical scanners,
optical readers, bar code readers, RFID readers, magnetic stripe card
readers, MICR readers, and data collection devices.
Optical scanner is any scanning technology that converts a physical image, text, or object into a digitized form that can be stored as a 2D image file on a computer.
Optical reader is a device that uses light source to read characters, marks, and codes and then converts them into digital data.
Bar code reader uses laser beams to read bar codes.
RFID reader reads information on the tag via radio waves.
Magnetic stripe card reader reads the magnetic stripe on the back of a credit card.
MICR readers can read text printed with magnetized ink.
Data collection devices obtain data directly at location where transaction or event takes place. They transmit data over network or Internet.
- Summarize the various biometric devices: fingerprint reader, face
recognition system, hand geometry system, voice verification system,
signature verification system, and iris recognition system
Fingerprint scanner captures curves and indentations of fingerprint.
Hand geometry system measures shape and size of person’s hand.
Voice recognition system compares live speech with stored voice pattern.
Signature verification system recognizes shape of signature.
Iris recognition system reads patterns in blood vessels in back of eye.
Face recognition system is a computer application for automatically identifying or verifying a person from a digital image or a video frame from a video source. One of the ways to do this is by comparing selected facial features from the image and a facial database.
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