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CIS Ch. 5
Terms in this set (57)
graphical user interface
has icons, buttons, and other graphical objects that allow you to select and issue commands.
to incorporate comfort, efficiency, and safety into the designs of items in the workplace
a touch-sensitive display.
just as legal as ink signatures
the computers capability of distinguishing spoken words.
a single point in a electronic image
dots per inch
the number of pixels in an inch of screen display
a video camera whose output displays on a web page.
shows moving images by sending a continual stream of pictures.
a meeting between two or more geographically separated people who use a network or the Internet to transmit audio and video data.
a light-sensing input device that reads printed text and graphics and then translates the results into a form the computer can use.
a device that uses a light source to read characters, mark, and codes and then converts them into digital data that a computer can process.
a document that you return to the company that creates and sends it.
Optical Mark Recognition (OMR)
devices read hand drawn marks such as small circles or rectangles
bar code scanner
uses laser beams to read bar codes
Identification code consisting of either vertical lines and spaces of different widths
describe how a timecard is related to data and a report to information
it is an example of data, a company might process this data into a report that summarizes the total hours worked and the payroll expense for the week
what is a command and how do users issue commands
an instruction given to a computer program. users can issue commands by typing or pressing keys on the keyboard.
what is the most user friendly way to interact with a computer
what is a function key
special keys programmed to issue commands to a computer
what can be used with many programs and what is the result
With many programs you can use a button, a menu, a function key, or a combination of keys to obtain the same result
how does enhanced key board differ from the standard key board
12 functions keys along the top, 2 CTRL keys, 2 ALT keys, and a set of arrow and additional keys between typing area and the numeric keypad.
how do most key boards attach to the computer
they attach to a serial port , or a keyboad port, or a USB port on the system unit via a cable.
what is a cordless keyboard
what does it transmit
how does it communicate with the computer
-a battery-powered device that transmits data using wireless technology, such as radio waves or infrared light waves
what does a pointer device move
it moves a pointer, or a small icon on the screen.
how does a mechanical mouse work and require
It has a rubber or metal ball on its underside, when the ball rolls a certain direction, electronic circuits in the mouse translate the movement into signals the computer understands.
requires a mouse pad.
what are touch screens used for and why
what is an optical mouse
what alternative devices does it use
- uses devices that emit and sense light to detect the mouses movement
- some use sensors, others use laser.
what is required to send handwritten notes via e-mail?
what do voice recognition programs not understand and what does it recognize
they do not understand speech.
it recognizes a vocabulary or pre-programmed words
what is a speaker-dependent and speaker-independent software
- speaker-dependent: the computer makes a profile of your voice, which means you have to train the computer to recognize your voice.
- speaker-independent: has a built-in set of word patterns.
describe the second and third step of how voice recognition works
2nd: analog-to-digital converter, translates sound waves into digital measurements the computer can understand
3rd: the software compares the spoken measurements to those in its database to find a match or list of possible matches.
what does windows store audio files as?
describe the size of a wave file
what does this require
wav files are large, often requiring more that 1 MB of storage space for a single minute of audio,
why do photojournalists use digital cameras
so they immediatley can view photographed images right on the camer
how can users share images and what do more expensive digital cameras use?
They can share them by posting the photos on a website, or e-mailing them.
-more expensive cameras use a higher-capacity storage device, which means they can hold more pitctures
describe three ways digital cameras transfer pictures to the computer
download, connect cable, use floppy disk
2nd, 3rd, 4th, and 5th steps of the internal processes of digital camera
2-the image is focused on a chip called a charge-coupled device (CCD)
3-the CCD generations an analog signal that represents the image
4- the analog signal is converted to a digital signal by an analog-to-digital converter (ADC)
5-a digital signal processor (DSP) adjusts the quality of the image and stores the digital image on storage media in the camera.
what does a built-in TV out port allow
You to display their pictures directly on your television screen
What does resolution describe and how many pixels are required for screen display and for images as good as film-based cameras?
- describes the sharpness and clearness on an image
-1-megapixel camera is fine for a screen displays such as photo communities, web pages, and email attachments.
-film-based cameras: 3 megapixel camera
why would you adjust DPI, and how does it connect to the computer
what are the storage requirements of a three-minute film clip
how does video compression work, what is the role of a video digitizer
-works be recognizing that only a small portion of a video image changes from frame to frame.
-a video digitizers role is to capture an individual frame from an analog video and then save the still picture in a file.
what is required to capture a signal frame
what is a whiteboard and what does it provide multiple users?
- another window on the screen that can display notes and drawings simultaneously on all participants' screens
-it provides multiple users with an area on which they can write or draw.
what is happening to the cost of videoconferencing
it continues to decrease
what do scanners eliminate
what do they capture data from
- eliminate the manual entry of data
-capture data from source document
provide several examples of these data sources, and list the devices that capture data from source documents
what is a flatbed scanner like and what can you do with a file produced from scanning a documnet
- works similarly to a copy machine except it create a file of the document n memory instead of a paper copy.
-you can display it on the screen, store it on a storage medium, print it , fax it etc.
how is the quality of a scanner measured
what does image processing allow
allows you to convert paper documents such as reports, memos, and procedure manuals into an electronic form.
what is an image processing system
similar to an electronic filing cabinet that provides access to exact reproductions of the original documents.
if scanned by a flatbed scanner, what would you not be able to do
how does OCR software rectify this problem,
what does an OCR device determine and what does it compare
- the shapes if characters by detecting patters of light and dark.
-it compares these shapes with predefined shapes stored in memory and converts the shapes into characters the computer can understand.
What does a bar code scanner read
uses laser beams to read bar codes
what is a magnetic-ink character recognition reader and what is it often used for
- it can read text printed with magnetized ink
- often used for check processing
what do many users have
what is used to collect and send the data
-Web-enabled computers and devices such as cellular telephones and pagers, which allow wireless connections to the Web.
-send data wirelessly to central office computers using these devices
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