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Chapter 8. Graphics and Animation. Graphics in Multimedia. Graphics are an element that virtually all multimedia applications include. What is a graphic?. A graphic can be a: Chart Drawing Painting Photograph Logo Navigation button Diagram. What do graphics look like?.

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Chapter 8

Chapter 8

Graphics and Animation

Graphics in multimedia
Graphics in Multimedia

  • Graphics are an element that virtually all multimedia applications include.

What is a graphic
What is a graphic?

  • A graphic can be a:

    • Chart

    • Drawing

    • Painting

    • Photograph

    • Logo

    • Navigation button

    • Diagram

What do graphics look like
What do graphics look like?

  • Graphics can be:

    • Black and White

    • Grayscale

    • Color

    • Still

    • Animated

What do graphics do
What do graphics do?

  • Graphics can:

    • Illustrate or demonstrate procedures

    • Clarify data

    • Convey ideas

    • Tell stories

    • Add visual appeal

Computer graphics technology
Computer Graphics Technology

  • Images created or edited on computers are either:

    • Bitmapped graphics

    • Vector graphics

What are bitmapped graphics
What are bitmapped graphics?

  • Bitmapped graphics, also known as raster graphics, consist of grids of tiny dots called pixels. Each pixel is assigned a color.

    • Can be a continuous-tone image, such as a photograph

    • Bitmap graphic editors are called paint programs

    • Enlarging a bitmap graphic may cause the image to lose crispness and clarity

What are vector graphics
What are vector graphics?

  • Vector graphics use mathematical formulas to define lines, curves, and other attributes.

    • Generally much smaller than raster graphic files

    • Vector graphic editors are called draw programs

    • Do not lose clarity as you enlarge them.

    • Appear as bitmaps on computer monitors because computer monitors consist of pixels

Graphics quality
Graphics Quality

  • Two factors that determine graphics quality are resolution and color depth.

    • Resolution is the number of pixels per inch.

    • Color depth refers to the number of distinct colors an image can contain. It can range from 2-bit (black and white) to 24-bit (16.7 million colors).

Graphic file formats
Graphic File Formats

  • A computer can save and interpret graphic images in a variety of formats. Some of the most common are:

    • GIF (Graphics Interchange Format)

    • JPEG (Joint Photographic Experts Group)

    • TIFF (Tagged Information File Format)

    • PIC (PICTure)

    • BMP (bitmap)

    • TGA (Targa)

    • PNG (Portable Network Graphics)

Editing graphics
Editing Graphics

  • Graphics editors have features for changing the sizes of images as well as their colors and other attributes. These include:

    • Dithering

    • Cropping

    • Anti-aliasing

    • Resizing

What is animation
What is animation?

  • Animation is when images achieve the illusion of motion.

Animation in multimedia
Animation in Multimedia

  • Some common uses of animation include:

    • An animated navigation button that changes when the cursor passes over it (rollover)

    • Tutorials using animated graphics for demonstration

    • Web site advertisements that are animated to attract attention

    • Computer games using animation to simulate action