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Glossary
achromatic
Without color, as black, white, and shades of gray.
affine transform
A transformation which preserves parallelism of lines.
animation
A simulation of movement created by displaying a series of pictures, or frames.
anti-aliasing
A form of interpolation used in graphics display technology when combining images; pixels along the transitions between images are averaged to provide a smooth transition.
applet
A small program that is intended not to be run on its own, but rather to be embedded inside another application.
arc
A section of a circle.
ascent
The distance which the characters rise above the baseline.
AWT
A package of GUI classes which was part of the original Java version.
baseline
(Type) The imaginary line on which all of the characters rest.
bilevel
A display which shows images in only 2 colors.
binary operator
An operator which takes two operands
bmp
A Microsoft graphics file format for (usually) device independent bitmaps.
Border Layout
(Java) A layout manager which divides the area into center, north, south, east, and west regions.
Box Layout
(Java) A layout manager which arranges components in either a single row or a single column.
brightness
The perceived intensity of light source.
check box
A GUI component which is intended to be selected or deselected, independently of other GUI selections.
chord
A straight line segment between two points on a curve.
circle
A curved planar figure, all points of which are the same distance from a fixed point called the center.
class
A composite type which can contain both data and subprograms, and which can participate in inheritance.
clipping
The restriction of graphics display to a designated area.
color gamut
The entire range of hues possible to reproduce using a specific device, such as a computer screen, or system, such as four-color process printing.
colorimetry
The measurement of color.
compiler
A translator from a high level language to a low level language.
complementary colors
Colors which are on opposite sides of a color wheel.
descent
The distance which the characters fall beneath the baseline.
dynamic range
The ratio between maximum and minimum intensities.
edge
A line segment between two vertices.
ellipse
A curved planar figure, the locus of all points which have the same total distance from two fixed points called the foci.
excitation purity
The physical purity of a color.
Flow Layout
(Java) A layout manager which arranges components in rows from left to right, and top to bottom.
font
A set of character glyphs, usually consistent in size, face, and style.
gamma correction
Correction for nonlinearities of luminance to brightness.
gif
A bit mapped graphics file format which uses LZW compression and a 256 (maximum) color palette.
Grid Layout
(Java) A layout manager which divides the area into a specified number of rows and columns.
GUI
A graphic, mouse-oriented paradigm which allows the user to interact with a computer.
halftone
A printing technique which uses dot size to control lightness.
hue
The perceived dominant color.
interpreter
A program expressed in one language which executes programs expressed in another language.
Java component
A visual GUI item.
Java container
A visual GUI window which can be used to hold Java components.
Java package
A set of Java classes organized for convenience in the same directory.
JPEG
A lossy compression technique for color images.
layout manager
A Java class which handles the arrangement of visual objects, as in a panel.
leading
The space between lines of type.
lightness
The perceived intensity of a light reflecting surface.
luminance
The physical intensity of light.
monochromatic light
Light consisting of a single wavelength.
object
A variable which is the instantiation of a class.
object-oriented programming
A style of programming that defines data as objects with attributes and methods that are applied to those objects, and which can be inherited by other objects.
polygon
A closed figure made by joining line segments, with each line segment intersecting exactly two others.
portability
The ability to be easily accessed or run by different systems and applications.
radio button
A GUI component which can be grouped to allow selection of a single choice from the group
raster graphics
Generation of images as a collection of small, independently controlled dots (pixels) arranged in rows and columns.
rectangle
A plane figure with 4 sides and 4 right angles.
rotation
A transformation which linearly changes the angle between the vector to a point and one of the axes, without changing the distance of the point from the origin.
saturation
The perceived purity of a color.
scaling
A transformation in which each coordinate is multipled by a factor.
self-similarity
Appearing the same at all magnifications.
shade
Artists' term for a color produced by mixing black with a colored pigment.
shear transform
A transformation in which the change in one coordinate is linearly related to another coordinate.
Swing
A Java 2 package of GUI classes
tint
Artists' term for a color produced by mixing white with a colored pigment.
tone
Artists' term for a color produced by mixing black and white with a colored pigment.
translation
Uniform translation of points to a new location without change in the size or orientation of an object.
unary operator
An operator with a single operand.
vector graphics
Generation of images from mathematical descriptions that determine the position, length, and direction in which lines are drawn.
vertex
The vertices of a polygon are the points where its sides intersect.

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