Slides in this set
14 Graphics packages
A graphics package is an application that can be
used to create and manipulate images on a
There are two main types of graphics package:
drawing packages…read more
A painting package produces images by changing
the colour of pixels on the screen
These are coded as a pattern of bits to create a
bitmapped graphics file.
Bitmapped graphics are used for images such as
scanned photographs or pictures taken with a
The main advantage offered by this type of graphic
is that individual pixels can be changed which
makes very detailed editing possible.…read more
Disadvantages of painting packages
Individual parts of an image cannot be resized; only
the whole picture can be increased or decreased in
Information has to be stored about every pixel in an
image which produces files that use large amounts
of backing storage space.
Examples of graphics packages that produce
bitmapped images include:-
MS Paint, PC Paintbrush, Adobe Photoshop and
JASC's Paint Shop Pro.…read more
A drawing package produces images that are made
up from coloured lines and shapes such as circles,
squares and rectangles.
When an image is saved it is stored in a vector
graphics file as a series of instructions, which can be
used to recreate it.
The main advantages of vector graphics are:
They use less storage space than bitmap graphics;
Each part of an image is treated as a separate
object, which means that individual parts can be
easily modified.…read more
Disadvantages of drawing packages
The disadvantage of vector graphics is that they don't
look as realistic as bitmap graphics.
Examples of drawing graphics packages include
CorelDraw, Micrographix Designer and computer aided
design (CAD) packages such as AutoCAD.…read more
Common features of graphics packages
Drawing straight lines and `freehand' lines;
Drawing regular pre-defined shapes like squares,
rectangles and circles using a special `tool';
Entering text and changing the style and size of font;
Changing the size of an object, or scaling
Rotating objects in either clockwise or anticlockwise
by specifying the direction and angle of rotation.
Stretching objects either horizontally or vertically.
`Flipping' an object either horizontally or