Transcript Chapter 5: Input CSC 151 Beth Myers Kristy Heller
Chapter 5: Input
CSC 151 Beth Myers Kristy Heller Julia Zachok
What is Input?
Input is any data or instructions entered into the memory of a computer
Forms
Instructions entered into the computer can be in the form of programs, commands, and user responses Data consists of a collection of unprocessed text, numbers, images, audio, or video
What are input devices?
Any hardware component that allows users to enter data or instructions into a computer
Input devices
Keyboard Mouse Stylus Digital Pen Microphone Digital camera Scanner
Keyboard
Input device that contains keys users press to enter data into the computer 101 – 105 keys Includes letters, numbers, punctuation marks, commands, toggle keys, and function keys
Pointing Devices
An input device that allows a user to control a pointer on the screen Pointer – a small symbol on the screen whose location and shape change as a user moves a pointing device Select text and graphics; move insertion point; click buttons, icons, links, and menu commands
Mouse
A pointing device that fits comfortably under the palm of your hand Types Optical mouse Mechanical mouse Cordless mouse
Trackball
A pointing device with a ball on its top and usually has one or more buttons that work as mouse buttons
Touchpad
A small, flat, rectangular pointing device that is sensitive to pressure and motion Touchpads are usually found on laptops
Pointing Stick
A pressure sensitive pointing device shaped like a pencil eraser that is positioned between keys on a keyboard Pointing sticks are usually found on laptops
Joystick
A vertical lever mounted on a base; includes buttons called triggers
Wheel
Steering wheel type input device used to simulate driving Includes foot pedals
Light Pen
A handheld input device that can detect the presence of light when pressed against the screen Usually requires a special monitor
Touch Screen
A touch sensitive display device Used for kiosks and ATM machines Most PDAs, Tablet Screens and some Notebook Computers have touch screens
Stylus and Digital Pen
Looks like an ink pen but uses pressure to write text and draw lines Originally called an electronic pen Some have electronic erasers and programmable buttons
Voice Input
The process of entering data by speaking into a microphone Voice Recognition is the computer’s capability of distinguishing spoken words
Audio Input
The process of entering any sound into the computer such as speech, music, and sound effects The users input sound via devices such as microphones, tape players, CD/DVD, players, or radios
PDAs/Tablet PC
Personal Digital Assistant Used with stylus The Tablet PC is larger in comparison and uses a digital pen
Smart Phones
Users can send graphics, pictures, video clips, sound files, and text messages
Digital Cameras
Allows users to take pictures and store the photographed images digitally instead of on traditional film Images can be immediately viewed You can input these images onto your computer to edit and print
Video Input
The process of capturing full motion images into a computer and storing them on a medium such as a hard disk or DVD
PC Video Cameras/ Web Cams
PC Video Cameras enable users to capture video and still images, send video with e-mail, add images to IM, make video telephone calls, and broadcast live on the Internet Web Cams display output on a web page
Scanners
Light sensing input device that reads printed text and graphics and then translates the results into a form the computer can process Four types are flatbed, pen, sheet-fed, and drum
Biometric Input
Biometrics – the technology of authenticating a person’s identity by verifying the personal characteristics Fingerprints Voice Signatures Eye patterns
Any questions?