1.  2002 Prentice Hall Chapter 7 Graphics, Hypermedia, and Multimedia

2.  2002 Prentice Hall 2 Topics Focus on Computer Graphics Dynamic Media: Beyond the Printed Page Interactive Multimedia: Eye, Ear, Hand, & Mind Data Compression – How and Why “If you look out in the future you can see how best to make right choices.” Doug Engelbart

3.  2002 Prentice Hall 3 Focus on Computer Graphics Computer graphics include:  Painting Software  Digital Image Processing  Drawing Software  3-D Modeling Software  CAD/CAM  Presentation Graphics

4.  2002 Prentice Hall 4 Painting Software Paint pixels on the screen with a pointing device such as a mouse, joystick, trackball, touch pad or pen. The pointer movements are translated into lines and patterns on the screen.

5.  2002 Prentice Hall 5 Graphics Talk Pixels are tiny dots of white, black, or color that make up images on the screen. Palette of tools that mimic real-world painting tools and other tools unique to computers. Bitmapped graphics (or raster graphics) are pictures that show how the pixels are mapped on the screen. Color depth is the number of bits devoted to each pixel. Resolution is the density of the pixels.

6.  2002 Prentice Hall 6 Digital Image Processing: Photographic Editing by Computer Software that allows the user to manipulate photographs and other high-resolution images with tools such as Adobe Photoshop. Far more powerful than traditional photo-retouching techniques.  Can distort and combine photos as demonstrated in the tabloids  Create fabricated images that show no evidence of tampering

7.  2002 Prentice Hall 7 Building a Photo Collage Take an image Combine it with other objectsMake a statement

8.  2002 Prentice Hall 8 Drawing: Object-Oriented Graphics Drawing software stores a picture as a collection of lines and shapes (called object-oriented or vector graphics). Memory demands on storage not as high as bit- mapped images. Many drawing tools - line, shape and text tools are similar to painting tools in bitmapped programs.

9.  2002 Prentice Hall 9 Pixels vs. Objects Bit-mapped painting (pixels) gives you these advantages:  More control over textures, shading and fine detail  Appropriate for screen displays, simulating natural paint media and embellishing photographs

10.  2002 Prentice Hall 10 Pixels vs. Objects Object-oriented drawing gives you these advantages:  Better for creating printed graphs, charts, and illustrations  Lines are cleaner and shapes are smoother

11.  2002 Prentice Hall 11 3-D Modeling Software Used to create three-dimensional objects with tools similar to those in drawing software. Goal for some applications: to create an animated presentation on a computer screen or videotape. Flexible: can create a 3-D model, rotate it, view it from different angles Can “walk-through” a 3-D environment that exists only in the computer’s memory

12.  2002 Prentice Hall 12 3-D Modeling Software Images in wireframe view; ones on right are fully rendered to add surface textures

13.  2002 Prentice Hall 13 CAD/CAM: Turning Pictures into Products Computer Aided Design (CAD) software allows engineers, designers, and architects to create designs on screen for products ranging from computer chips to public buildings. Can test product prototypes Cheaper, faster, and more accurate than traditional design-by-hand techniques

14.  2002 Prentice Hall 14 CAD/CAM: Turning Pictures into Products Computer-Aided Manufacturing (CAM) is the process by which data related to the product design are fed into a program that controls the manufacturing of parts. Computer-Integrated Manufacturing (CIM) refers to the combination of CAD/CAM and is a major step toward a fully automated factory.

15.  2002 Prentice Hall 15 Presentation Graphics: Bringing Lectures to Life Presentation graphics software helps to automate the creation of visual aids for lectures, training sessions, sales demonstrations, and other presentations. Create slide shows directly on computer monitors or LCD projectors, including still images, animation and video clips. Slides might include:  photographs  drawings  charts  tables

16.  2002 Prentice Hall 16 Dynamic Media: Beyond the Printed Page Modern media contains dynamic information-- information that changes over time or in response to user input.  Animation  Desktop Video  Audio

17.  2002 Prentice Hall 17 Animation: Graphics in Time Each frame of computer-based animation is a computer- drawn picture and the computer displays those frames in rapid succession.  Tweening-instead of drawing each frame by hand, animator can create key frames and objects and use software to help fill in the gaps “Anything you can imagine can be done. If you can draw it, if you can describe it, we can do it. It’s just a matter of cost.” James Cameron, Filmmaker

18.  2002 Prentice Hall 18 Desktop Video: Computers, Film, and TV A video digitizer can convert analog video signals from a television broadcast or videotape into digital data.

19.  2002 Prentice Hall 19 Desktop Video: Computers, Film, and TV Video editing software such as Adobe Premiere makes it easy to eliminate extraneous footage, combine clips from multiple takes, splice together scenes, create specific effects and other activities. Morphs are video clips in which one image metamorphoses into another. Data compression software and hardware are used to squeeze data out of movies so they can be stored in smaller spaces.

20.  2002 Prentice Hall 20 The Synthetic Musician: Computers and Audio Audio digitizer- captures sound and stores it as a data file Synthesizer - electronic instrument that synthesizes sounds using mathematical formulas MIDI - Musical Instrument Digital Interface is a standard interface that allows electronic instruments and computers to communicate with each other Sequencing software - turns a computer into a musical composition, recording and editing machine.

21.  2002 Prentice Hall 21 Interactive Multimedia: Eye, Ear, Hand, and Mind A combination of text, graphics, animation, video, music, voice and sound effects that allows the user to take an active part in the experience. Requirements: high- quality color monitors, fast processors, large memory, CD-ROM drives, speakers, and sound cards

22.  2002 Prentice Hall 22 Multimedia Authoring: Making Mixed Media Multimedia authoring software glues together media captured and created with other applications. Multimedia authoring tools include prewritten behaviors attached to buttons, images or other on-screen objects

23.  2002 Prentice Hall 23 Interactive Media: Visions of the Future Positive aspects:  Users become active participants  People gain control over the media and use it to create a new kind of digital democracy Negative aspects:  Users become isolated and addicted to the technology  Media used to influence and control unwary citizens

24.  2002 Prentice Hall 24