1 / 24

Chapter 7

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.

bethesda
Download Presentation

Chapter 7

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Chapter 7 Graphics, Hypermedia, and Multimedia

  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. Focus on Computer Graphics • Computer graphics include: • Painting Software • Digital Image Processing • Drawing Software • 3-D Modeling Software • CAD/CAM • Presentation Graphics

  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. 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.

  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. Building a Photo Collage Combine it with other objects Make a statement Take an image

  8. 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.

  9. 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

  10. Pixels vs. Objects • Object-oriented drawinggives you these advantages: • Better for creating printed graphs, charts, and illustrations • Lines are cleaner and shapes are smoother

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

  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. 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. 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

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

  19. 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.

  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. 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. 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. 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

More Related