Ch08

562 views

Published on

Published in: Technology
  • Be the first to comment

  • Be the first to like this

Ch08

  1. 1. Chapter 8Graphics and Animation
  2. 2. 8Graphics in Multimedia Graphics are an element that virtually all multimedia applications include.
  3. 3. 8W is a graphic? hatA graphic can be a: Chart Drawing Painting Photograph Logo Navigation button Diagram
  4. 4. 8W do graphics look like? hatGraphics can be: Black and White Grayscale Color Still Animated
  5. 5. 8W do graphics do? hatGraphics can: Illustrate or demonstrate procedures Clarify data Convey ideas Tell stories Add visual appeal
  6. 6. 8Computer Graphics Technology Images created or edited on computers are either: Bitmapped graphics Vector graphics
  7. 7. 8W are bitmapped graphics? hat 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. 8. 8W are vector graphics? hat 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. 9. 8Graphics 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. 10. 8Graphic 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. 11. 8Editing GraphicsGraphics editors havefeatures for changingthe sizes of images aswell as their colors andother attributes. Theseinclude: Dithering Cropping Anti-aliasing Resizing
  12. 12. 8W is animation? hatAnimation is whenimages achieve theillusion of motion.
  13. 13. 8Animation 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

×