is the smallest unit of information stored or manipulated on a computer; it consists of either zero or one.
New cards
2
Digital images
are a collection of pixels. where each pixel consists of binary numbers.
New cards
3
Color
is based on light.
New cards
4
Images
are not often just black and white.
New cards
5
analog signal
exists throughout a continuous interval of time and takes on a continuous range of values.
New cards
6
digital signal
is a sequence of discrete symbols.
New cards
7
Sampling
is recording an analog signal at regular discrete moments and converting them to a digital signal.
New cards
8
Data compression
is useful in computing to save disk space, or to reduce the bandwidth used when sending data (eg, over the Internet).
New cards
9
Compression
is also an important consideration when it comes to backing up and archiving your important files, particularly for uploading over the Internet.
New cards
10
Lossless algorithms
are those that can reconstruct the original message exactly from the compressed message, and lossy algorithms can only reconstruct an appsimation of the original message.
New cards
11
Lossless compression
packs data in such a way that the compressed package can be decompressed, and the data can be pulled out exactly the same as it went in.
New cards
12
Text compression
is another important area for lossless compression.
New cards
13
Lossy compression
is a technique that does not decompress digital data back to 100% of the original.
New cards
14
Images
high image compression loss can be observed in photos when enlarged
New cards
15
Music
there is a difference between an MP3 music and a high-resolution audio file
New cards
16
Video
moving frames of video can handle a greater loss of pixels compared to an image
New cards
17
Data extraction
is the process of obtaining data from a database or software such as a social media website so that it can transport it to another software (such as spreadsheets) designed to support online analytical processing.
New cards
18
graph
is a pictorial representation, a diagram used to represent data.
New cards
19
Graphs and charts
represent data in points, lines, bars, pie charts, and scatter plots.
New cards
20
Picture graphs
use pictures to represent values.
New cards
21
Bar graphs
use either vertical or horizontal bars to represent the values.
New cards
22
Line graphs
use lines to represent the values.
New cards
23
Scatter plots
represent the data with points, and then a best-fit line is drawn through some of the points.
Studied by 1219 people
