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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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Focus on Computer Graphics • Computer graphics include: • Painting Software • Digital Image Processing • Drawing Software • 3-D Modeling Software • CAD/CAM • Presentation Software Prentice Hall
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 Prentice Hall
Painting Software Use pointing devices to “paint” objects, shapes or freehand script on the screen Prentice Hall
Painting Software Painting tools are used to create drawings A variety of special effects can be added Prentice Hall
Painting Software Outlinedshapes can be filled with colors Windows Paint Prentice Hall
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 Prentice Hall
Digital Image Processing Combine it with other images to create this… Start with this photo… Or this… Prentice Hall
Digital Image Processing:Software Adobe Photoshop • Acquires images • Manipulates pixels • Layers – edited and stored independently • Used by professionals • Saves in other formats Prentice Hall
Digital Image Processing:Software • Coral PhotoPaint • Adobe Photoshop Elements • Microsoft Picture It! • Jasc Paint Shop • Apple iPhoto Prentice Hall
Drawing:Object-Oriented Graphics Object-Oriented Software offers drawing tools similar to painting software Pointing devices are used to create various shapes Prentice Hall
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 Prentice Hall
Drawing: Software • Adobe Illustrator • Macromedia Freehand • Corel Draw Prentice Hall
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) Prentice Hall
Painting Pixelsvs.Drawing Object Shapes When painting with pixels: • Use for simulatingnatural paint media • Use to embellishphotographic images Prentice Hall
Painting Pixelsvs.Drawing Object Shapes When drawing object shapes: • shapes and lines are cleaner and smoother • use for creating printed graphs, charts, and illustrations Prentice Hall
Graphics File Formats • Native file formats • For commercial printing • Tiff – bit-mapped, images from scanners, widely supported • EPS – encapsulated postscript Prentice Hall
Graphics File Formats Platform dependent Paint programs • BMP – Windows bit-map • PICT – Macintosh, both bit-mapped and object-oriented Prentice Hall
Graphics File Formats:for the WEB GIF • 256 possible colours • Lossless compression • JPEG • Photo-realistic • Lossy compression Prentice Hall
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 Prentice Hall
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) Prentice Hall
CAD/CAM: From Picturesto Products Engineers,architects, and designersuse CAD/CAMsoftware to designor manufactureproducts Prentice Hall
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 Prentice Hall
Dynamic Media:Beyond the Printed Page • Modern media often contains dynamic information that changes over time or in response to user input Prentice Hall
Animation: Graphics in Time Create the illusionof animation fromstill images with animated graphics Prentice Hall
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 Prentice Hall
3-D Modeling Software Illustrators and designers use this software to add depth to two dimensional objects Prentice Hall
3-D Modeling Software Objects can be stretched…rotated … and combined with other objects Prentice Hall
3-D Modeling Software Volume based • Medicine and scientific visualization • Surface based • Photo-realistic • TV, movies, computer games Prentice Hall
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 Prentice Hall
3-D Modeling Process Model description • Solids • Polygon surface • Wire-frame • Artist models (defines) a 3-D actor Prentice Hall
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 Prentice Hall
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 Prentice Hall
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 Prentice Hall
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) Prentice Hall