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Graphics and Animation

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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Graphics and Animation

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  1. Chapter 8 Graphics and Animation

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

  3. What is a graphic? • A graphic can be a: • Chart • Drawing • Painting • Photograph • Logo • Navigation button • Diagram

  4. What do graphics look like? • Graphics can be: • Black and White • Grayscale • Color • Still • Animated

  5. What do graphics do? • Graphics can: • Illustrate or demonstrate procedures • Clarify data • Convey ideas • Tell stories • Add visual appeal

  6. Computer Graphics Technology • Images created or edited on computers are either: • Bitmapped graphics • Vector graphics

  7. 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

  8. 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

  9. 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).

  10. 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)

  11. 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

  12. What is animation? • Animation is when images achieve the illusion of motion.

  13. 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

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