Quiz 2

Comped321L

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

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. This kind of instrument also offers a button.  Light pen can be used on PDA's and also other kinds of portable computers.

 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.

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.

Digital Pen pen input devices found in several sophisticated graphic devices.  Generally electronic digital pen supplies much more performance compared to stylus pen.

2. The purpose of various game controllers: game pads, joysticks and wheels, light guns, dance pads and motion-sensing game controllers.

Game Pad  is a general purpose game pad for use with {!IBM PC Compatible} computer games. The controller features 10 buttons and a special plug that allows two game pads to be connected to the same port. The unit is designed to be easily programmable for use with Windows 95 games.

Joystick This is to make a machine to perform in a certain way like the up and down, left and right arrows on you keyboard.

A 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. Most dance pads are divided into a 3×3 matrix of square panels for the player to stand on, with some or all of the panels corresponding to directions or actions within the game. Some dance pads also have extra buttons outside of the main stepping area, such as "Start" and "Select". Pairs of dance pads are often joined side-by-side for certain gameplay modes.

3. Explain how resolution affects the quality of a picture captured on a
digital camera.
Image resolution describes the detail an image holds. The term applies to raster digital images, film images, and other types of images. Higher resolution means more image detail.
Image resolution can be measured in various ways. Basically, resolution quantifies how close lines can be to each other and still be visibly resolved. Resolution units can be tied to physical sizes (e.g. lines per mm, lines per inch), to the overall size of a picture (lines per picture height, also known simply as lines, or TV lines), or to angular subtenant. Line pairs are often used instead of lines; a line pair comprises a dark line and an adjacent light line. A Line (or TV line, TVL) is either a dark line or a light line. A resolution of 10 lines per millimeter means 5 dark lines alternating with 5 light lines, or 5 line pairs per millimeter (5 LP/mm). Photographic lens and film resolution are most often quoted in line pairs per millimeter.

4. Describe the uses of voice recognition, Web cams, and video conferencing.
Voice recognition is the process of taking the spoken word as an input to a computer program. This process is important to virtual reality because it provides a fairly natural and intuitive way of controlling the simulation while allowing the user's hands to remain free.
A webcam is a video camera which feeds its images in real time to a computer or computer network, often via USB, ethernet or Wi-Fi

Video calling and conferencing

As webcam capabilities have been added to instant messaging, text chat services such as AOL Instant Messenger, and VoIP services such as Skype, one-to-one live video communication over the Internet has now reached millions of mainstream PC users worldwide. Improved video quality has helped webcams encroach on traditional video conferencing systems. New features such as automatic lighting controls, real-time enhancements (retouching, wrinkle smoothing and vertical stretch), automatic face tracking and autofocus assist users by providing substantial ease-of-use, further increasing the popularity of webcams.

 Video security

Webcams are also used as security cameras. Software is available to allow PC-connected cameras to watch for movement and sound, recording both when they are detected; these recordings can then be saved to the computer, e-mailed or uploaded to the Internet. In one well-publicised case, a computer e-mailed out images as the burglar stole it, allowing the owner to give police a clear picture of the burglar's face even after the computer had been stolen.

 Video clips and stills

Webcams can be used to take Video clips and still pictures. Various software tools in wide use can be employed for this, such as PicMaster (for use with Windows operating systems), Photo Booth (Mac), or Cheese (with Unix systems). Input control devices