DIGITAL IMAGING DEFINITIONS Assignment 2
2.8 – Practice a variety of professional applications of photography
For this assignment you are to use the internet to find definitions for the
following terms. Put the definitions in your own words to help you remember
them. When you complete the definitions save your work to the X drive as
your name.
1.
bit
A unit of information expressed as either a 0 or 1 in binary notation.
2.
byte
In most computer systems, a byte is a unit of data that is eight binary digits long
3.
kilobyte (include the abbreviation)
A unit of memory or data equal to 1,024 (210) bytes.
kB
4.
megabyte (include the abbreviation)
A unit of information equal to 220 bytes or, loosely, one million bytes. MB
5.
gigabyte (include the abbreviation)
A unit of information equal to one billion (109) or, strictly, 230 bytes GB
6.
dpi
Dots per inch, a measure of the resolution of printers, scanners, etc
7.
resolution
Image resolution is an umbrella term that 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.
8.
RGB
RGB is an additive colour model in which three primary colours of light (red, green and
blue) are combined in varying intensities to produce all other colours. Monitors, scanners
and the human eye use RGB to produce or detect colour.
9.
CMYK
Cyan, magenta, yellow, and black, the four colors used in most color printers, usually in
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two ink cartridges, one of black ink and the other containing cyan, magenta, and yellow
inks in separate reservoirs
10.
gray scale
In photography and computing, a grayscale or greyscale digital image is an image in
which the value of each pixel is a single sample, that is, it carries only intensity
information. Images of this sort, also known as black-and-white, are composed
exclusively of shades of gray, varying from black at the weakest intensity to white at the
strongest.[1]
11.
gif
A popular format for image files, with built-in data compression
12.
jpg
In computing, JPEG is a commonly used method of lossy compression for photographic
images. The degree of compression can be adjusted,.
13.
tif
TIF file extension, pronounced Tif) TIFF is the format of choice for archiving important
images.
14.
bmp
The BMP file format, sometimes called bitmap or DIB file format (for deviceindependent bitmap), is an image file format used to store bitmap digital images,
especially on Microsoft Windows and OS/2 operating systems.
15.
graphics format
Formats are most often used to display images on the Internet.
-try the following web sites or what we’ve already read to assist you with
some of the definitions:
www.techweb.com/ encyclopedia
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www.dictionary.com
Rubric:
Rubric: Name(s):_______________ _____________________
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