quiz2

1. Describe various types of pen input, and identify other types of input for smart phones.

          There are several methods of getting data into your computer. Some include using a mouse of which there are several different types such as mechanical mouse, optical mouse and cordless mouse. You also have a touchpad and joysticks. Below you will find some other non conventional pen input devices.

          Light Pen - 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 it's front-end. Once the front-end on the pen is actually touched on the display screen, the actual photocell registers a position associated with display. This kind of instrument also offers a button. An individual points to the actual object that will end up being chosen on the display screen using the light pen after which clicks the button in the pen. Light pen gadgets are utilized by technical engineers, visual creative designers and so on. These types of gadgets call for unique displays. Light pen can be used on PDA's and also other kinds of portable computers.

          The electrical light pen input instrument is usually combined with creating computer software. Designed screen data files are usually joined using a light pen simply by directing it to display positions. A new place shows up on the screen in the area exactly where pen is placed which is sensed through the photocell. The pc software operated the feedback transmission of the instrument.

          Digitizer - A Digitizer is also called a graphic tablet and uses a pen input device. It's a flat, rectangle-shaped digital plastic material pad. Every position to the digitizer points to matching video display. It's primarily useful for producing road maps and also engineering blueprints. The actual input gadgets stylus pen and also cursor can be used to trace sketches and also drawings to the digitizer.

          Whenever you sketch upon the digitizer with the aid of the stylus pen or cursor, this converts the actual actions associated with stylus or cursor straight into electronic signals which are afterwards routed to the laptop or computer. Therefore a digitizer makes it simple to key in free-hand sketching in to a laptop or computer.

          Stylus and Cursor - Stylus pen 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. Pen input devices found in several sophisticated graphic devices is called Digital Pen. Generally electronic digital pen supplies much more performance compared to stylus pen.

          Stylus pen can be used in graphic programs for instance Computer Aided Design (CAD) and also engineering blueprints and so forth. It's got the convenience of removing textual content as well as lines.

          The actual cursor is surely an input product. It's also used to trace sketches and also drawings with a graphic tablet or perhaps digitizer. This appears like some sort of computer mouse, with the exception of it's got a window using crosshairs, therefore the end user is able to see through to the actual digitizer. Cursor is generally known as Puck.

2. The purpose of various game controllers: gamepads, joysticksand wheels, light guns, dance pads,

and motion-sensing game controllers.

          Control pad on an audio player allows users to scroll through music, adjust volume, and customize settings

Ø

          Gamepad 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.

3. Explain how resolution affects the quality of a picture captured on a

digital camera.
          

Ø          Sharpness and clarity of image

Ø                The higher the resolution, the better the image quality, but the more expensive the camera

Ø

                 Is single point in electronic image

          Pixel (picture element)

4. Describe the uses of voice recognition, Web cams, and video conferencing.

Ø

 

  Video conferencing - Two or more geographically separated people who use network or Internet to transmit audio and video data.

    Web cam-video camera whose output displays on a Web page.

5. 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 Reader -Two or more geographically separated people who use network or Internet to transmit audio and video data.
 

Ø            Bar Code Readers -Uses laser beams to read bar codes.

6. Summarize the various biometric devices: fingerprint reader, face

recognition system, hand geometry system, voice verification system,

signature verification system, and iris recognition system