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Chapter 7. Graphics, Hypermedia, and Multimedia. Topics. Focus on Computer Graphics Dynamic Media: Beyond the Printed Page Interactive Multimedia: Eye, Ear, Hand, & Mind Data Compression – How and Why.

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chapter 7

Chapter 7

Graphics, Hypermedia, and Multimedia

topics
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

focus on computer graphics
Focus on Computer Graphics
  • Computer graphics include:
    • Painting Software
    • Digital Image Processing
    • Drawing Software
    • 3-D Modeling Software
    • CAD/CAM
    • Presentation Graphics
painting software
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.
graphics talk
Graphics Talk
  • Pixelsare tiny dots of white, black, or color that make up images on the screen.
  • Paletteof 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 depthis the number of bits devoted to each pixel.
  • Resolutionis the density of the pixels.
digital image processing photographic editing by computer
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
building a photo collage
Building a Photo Collage

Combine it with other objects

Make a statement

Take an image

drawing object oriented graphics
Drawing: Object-Oriented Graphics
  • Drawing software stores a picture as a collection of lines and shapes (called object-orientedorvector 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.
pixels vs objects
Pixels vs. Objects
  • Bit-mappedpainting(pixels) gives you these advantages:
    • More control over textures, shading and fine detail
    • Appropriate for screen displays, simulating natural paint media and embellishing photographs
pixels vs objects10
Pixels vs. Objects
  • Object-oriented drawinggives you these advantages:
    • Better for creating printed graphs, charts, and illustrations
    • Lines are cleaner and shapes are smoother
3 d modeling software
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
3 d modeling software12
3-D Modeling Software

Images in wireframe

view; ones on right are fully rendered to add surface textures

cad cam turning pictures into products
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
cad cam turning pictures into products14
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.
presentation graphics bringing lectures to life
Presentation Graphics: Bringing Lectures to Life
  • Presentationgraphicssoftwarehelps 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
dynamic media beyond the printed page
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
animation graphics in time
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
desktop video computers film and tv
Desktop Video: Computers,  Film, and TV
  • A video digitizer can convert analog video signals from a television broadcast or videotape into digital data.
desktop video computers film and tv19
Desktop Video: Computers,  Film, and TV
  • Video editing softwaresuch 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 compressionsoftware and hardware are used to squeeze data out of movies so they can be stored in smaller spaces.
the synthetic musician computers and audio
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.
interactive multimedia eye ear hand and mind
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
multimedia authoring making mixed media
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
interactive media visions of the future
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