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Graphics, Hypermedia, and Multimedia. Focus on Computer Graphics. Computer graphics include: Painting Software Digital Image Processing Drawing Software 3-D Modeling Software CAD/CAM Presentation Software. Painting Software. G r A p h i c S.

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Graphics, Hypermedia, and Multimedia


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Focus on Computer Graphics

  • Computer graphics include:

    • Painting Software

    • Digital Image Processing

    • Drawing Software

    • 3-D Modeling Software

    • CAD/CAM

    • Presentation Software

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Painting Software

GrAphicS

Pixels: tiny dots of white, black or color arranged on the screen

Bit-Mapped Graphics: pictures that are simple maps showing how the pixels should be arranged on the screen

Resolution: the number of pixels (dots) per inch

J a r g o n

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Painting Software

Use pointing devices to “paint” objects, shapes or freehand script on the screen

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Painting Software

Painting tools are used to create drawings

A variety of special effects can be added

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Painting Software

Outlinedshapes can be filled with colors

Windows Paint

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Digital Image Processing:Photographic Editing by Computer

Why Digital Imaging Software?

  • Provides a powerful way to edit high resolution images captured by digital cameras and scanners

  • Allows photographs to be edited and combined (think of the supermarket tabloids)

  • Offers a way to touch up pictures and make them look more professional and polished

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Digital Image Processing

Combine it with other images to create this…

Start with this photo…

Or this…

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Digital Image Processing:Software

Adobe Photoshop

  • Acquires images

  • Manipulates pixels

  • Layers – edited and stored independently

  • Used by professionals

  • Saves in other formats

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Digital Image Processing:Software

  • Coral PhotoPaint

  • Adobe Photoshop Elements

  • Microsoft Picture It!

  • Jasc Paint Shop

  • Apple iPhoto

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Drawing:Object-Oriented Graphics

Object-Oriented Software offers drawing tools similar to painting software

Pointing devices are used to create various shapes

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Drawing

Shapes in Object-Oriented Software:

  • Are stored as formulas (not pixels) that describe how to draw that shape

  • Drawings are smoother and require less memory than bit-mapped drawings

  • Resolution is not fixed

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Drawing: Software

  • Adobe Illustrator

  • Macromedia Freehand

  • Corel Draw

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Painting Pixelsvs.Drawing Object Shapes

When painting with pixels:

  • You have more control over textures, shading, and fine detail

  • Use for creating screendisplays (for video games, multimedia presentations, and Web pages)

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Painting Pixelsvs.Drawing Object Shapes

When painting with pixels:

  • Use for simulatingnatural paint media

  • Use to embellishphotographic images

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Painting Pixelsvs.Drawing Object Shapes

When drawing object shapes:

  • shapes and lines are cleaner and smoother

  • use for creating printed graphs, charts, and illustrations

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Graphics File Formats

  • Native file formats

  • For commercial printing

  • Tiff – bit-mapped, images from scanners, widely supported

  • EPS – encapsulated postscript

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Graphics File Formats

Platform dependent Paint programs

  • BMP – Windows bit-map

  • PICT – Macintosh, both bit-mapped and object-oriented

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Graphics File Formats:for the WEB

GIF

  • 256 possible colours

  • Lossless compression

  • JPEG

  • Photo-realistic

  • Lossy compression

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Presentation Graphics:Bringing Lectures to Life

Presentation graphics software is used to create visual aids for:

  • Lectures

  • Training and education sessions

  • Sales and product demonstrations

  • Meetings

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Presentation Graphics:Bringing Lectures to Life

  • Users can Enter textin outline form

  • Enhance text with font and style changes, clip art, audio, and videoclips

  • Add Special effects and transitions to computer “slide shows”(like this one)

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CAD/CAM: From Picturesto Products

Engineers,architects, and designersuse CAD/CAMsoftware to designor manufactureproducts

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CAD/CAM: From Pictures to Products

  • CAD (computer-aided design) is a modern drafting tool for designers

    • Designs can be tested under various conditions before being built

  • CAM (computer-aided manufacturing) is a program that controls the manufacturing of parts

    • CAM uses data from a CAD programto build the part that was designed

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Dynamic Media:Beyond the Printed Page

  • Modern media often contains dynamic information that changes over time or in response to user input

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Animation: Graphics in Time

Create the illusionof animation fromstill images with animated graphics

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Animation: Graphics in Time

  • Tedious tasks have been automated with computers and animation software

  • Artist draws the key frames only

  • In-between frames are computer-drawn

  • Toy Story was the first full-length animated movie created on a computer

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3-D Modeling Software

Illustrators and designers use this software to add depth to two dimensional objects

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3-D Modeling Software

Objects can be stretched…rotated … and combined with other objects

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3-D Modeling Software

Volume based

  • Medicine and scientific visualization

  • Surface based

  • Photo-realistic

  • TV, movies, computer games

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3-D Modeling Software

Surface based

  • High performance computers and custom software

  • E.G. Jurassic Park: dinosaurs are 6.5 minutes

  • Required 50 people, 18 months and $15 million equipment

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3-D Modeling Process

Model description

  • Solids

  • Polygon surface

  • Wire-frame

  • Artist models (defines) a 3-D actor

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    3-D Animation

    • Places the 3-D actor into the scene

    • Scene is composed of multiple actors and background and timing and camera movement

    • Scenes are rendered: computer software does the lighting, shading, perspective, hidden surface removal

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    Desktop Video:Computers, Film and TV

    Video digitizers allow you to capture analog video images as digital data that can be stored and manipulated in the computer’s memory

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    Interactive Multimedia:Eye, Ear, Hand, and Mind

    Combine text, graphics, animation, video, music, or sound effects in such a way that the user takes an active part in the experience

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    Multimedia Authoring:Making Mixed Media

    Create and edit multimedia projects.

    • Begin with source documents (text, graphics, video clips, music, and sound files)

    • Multimedia authoring software allows you to combine the individual sources

    • Authoring software allows the project to be interactive (requiring the user to take an active role)

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