OBJECTIVES:- -Define input and differentiate among a program,command,and user response -Identify the keys and buttons commonly found on desktop computer keyboards,and describe how keyboards for mobile computers and devices differ from desktop computer keyboards -Describe different mouse type -Describe various types of touch screens and explain how a touch-sensitive pad works -Describe various type of pen input,and identify other types of input of smart phones -Summarize the purpose of various game controllers -Explain how resolution affects the quality of a picture captured on a digital camera -Describe the uses of voice recognition,Web Cams,and video conferencing -Describe how various scanners and reading devices work -Summarize the various biometric devices -Discuss how POS terminals,automated teller machines ,and DVD kiosks work -Identify alternative input devices for physically challenged users INPUT Definition: Data and instructions entered into the memory of computer -Instruction can be entered into the computer in the forms of programs,command,and user programs -A program is a series of related instructions that tells a computer what takes to perform them==> Programs respond to commands that a user issues==> A user response is an instruction of a user issues by replying to a question display by a program THE KEYBOARD -Most desktop computer keyboards have between 101 and 105 keys,a numeric keypad on the right side of the keyboard,Function keys,CTRL keys,ALT keys and arrow keys,WINDOWS keys,application keys,toggle keys -Keyboard on mobile devices typically are smaller and/or have fewer keys MOUSE -A mouse is a pointing device that fits under the palm of your hand comfortably -A mouse can be wired or wireless -Type of mouse: trackball,touchpad,pointing stick TOUCH SCREENS AND TOUCH SENSITIVE PADS -A touch screen is a touch sensitive display device PEN INPUT
GAME CONTROLLER
Factors affect the quality of digital camera photos :RESOLUTION and NUMBER OF BITS STORED IN EACH PIXELS -Definition of Resolution: The number of horizontal and vertical pixels in a display device -Number of bits stored in each pixels: Each pixels consists of one or more bits of data.The more bits used to represent a pixel,the more colours and shades of gray that can be represented VOICE INPUT -Voice recognition =>The computer's capability of distinguish spoken words Web Cam -Type of digital video camera that enable users to capture video and still images,send e-mail message with video attachment,add live images,broadcast,make video calls. Video Conferencing A meeting between two or more geographically separated people Biometric Input -Biometric authenticates a person's identity by verifying a personal characteristic EXAMPLE: Fingerprint reader,face recognition system,hand geometry system,voice verification system,signature verification,iris recognition,retina scanners Terminals
Input Devices for Physically Challenged User
SUMMARY
-Various techniques of entering input -Several commonly used input devices -Keyboard, mouse, and other pointing devices; touch screens, pen input, other input for smart phones, game controllers, digital cameras, voice input, video input, scanners and reading devices, biometric input, and terminals.Keyboard, mouse, and other pointing devices; touch screens, pen input, other input for smart phones, game controllers, digital cameras, voice input, video input, scanners and reading devices, biometric input, and terminals -Input devices for physically challenged user
0 Comments
Leave a Reply. |
Archives
October 2016
Categories |