LESSON 7: ELEMENTS OF GRAPHIC PACKAGES

A graphics package is an application that can be used to create and manipulate images on a computer.

There are two main types of graphics package:

  • painting packages
  • drawing packages
Painting packages
  • 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 digital camera.

Advantages

  • The main advantage offered by this type of graphic is that individual pixels can be changed which makes very detailed editing possible.

Disadvantages of painting packages

  • Individual parts of an image cannot be resized;
  • only the whole picture can be increased or decreased in size.
  • 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.

Drawing packages
  • 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.

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.

Disadvantages of drawing packages

  • 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.

ACTIVITY SEVEN

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