Download Paint Programs Photo-Manipulation Programs Draw Programs

lesson 22
Graphics Software
This lesson includes the following sections:
• Paint Programs
• Photo-Manipulation Programs
• Draw Programs
• Computer-Aided Design Programs
• 3-D Modeling Programs
• Animation
• Graphics and the World Wide Web
Paint Programs
• Paint programs work with bitmap images and manage
the individual pixels that make up an image.
• Paint programs provide a variety of tools that can add
special effects to an image.
• It can be difficult to edit an entity in a paint program
because the program does not see the entity as a whole,
but as a set of pixels. To edit the image, you must make
changes to the pixels that comprise it.
As the circle is zoomed on the screen,
the individual pixels can be seen.
Pixelization is characteristic
of paint programs.
Photo-Manipulation Programs
•
Photo-manipulation programs are bitmap-based
programs, which are used primarily to edit electronic
or digitized photographs.
•
Photo-manipulation programs can repair problems
with an image, such as adjusting colors or hiding
mistakes.
•
Photo-manipulation programs can produce
sophisticated effects, such as combining multiple
images into a seamless whole, hiding parts of an image,
and more.
The airbrush tool can
be used to repair a
scratched photograph.
Draw Programs
•
Draw programs work with vectors and give the
designer a great deal of flexibility in editing an image.
•
Objects created in a draw program can be altered
easily and without loss of image quality.
•
Draw programs work well with text.
Computer-Aided Design Programs
•
Computer-Aided Design (CAD) programs are used in
technical design fields to create models of objects that
will be built or manufactured.
•
CAD software allows users to design objects in three
dimensions (3-D) and to produce 3-D wireframe and
solid models.
•
CAD products provide the user with high precision,
and enable the user to divide drawings into layers, and
add accurate dimensions (measurements) to a drawing.
3-D Modeling Programs
Designers use 3-D modeling programs to build threedimensional models of objects and characters, and to add
special effects to them.
Modeling programs use four techniques to build models:
• Surface modeling
• Solid modeling
• Polygonal modeling
• Spline-based modeling
Gear Model in 3-D
Animation
•
Computers are used to create animation in various
fields, including games and movies.
•
Fly-bys and walk-throughs are basic types of computer
animation.
•
Character animation is the art of creating a character
and making it move in a lifelike manner.
•
Compositing tools allow designers to add characters
and objects to scenes that did not originally contain
them.
Fly-by frame sequence
Graphics and the World Wide Web
•
Web pages support many types of graphics, including
bullets, rules, logos, complex artwork, and
photographs.
•
The GIF and JPEG image formats are the most widely
used formats on the Web.
•
Animation can be added to a Web page by using
simple animated GIF images or plug-in software such
as Flash or Shockwave.
lesson 22 Review
•
List five types of graphics software and their uses.
•
Differentiate the way bitmap and vector graphics
programs work.
•
Describe four methods for creating 3-D computer
models.
•
Identify three categories of computer-generated
animation.
•
Name five types of graphics elements commonly found in
Web pages.