Chapter 7TopicsFocus on Computer GraphicsPainting SoftwareGraphics TalkDigital Image Processing: Photographic Editing by ComputerBuilding a Photo CollageDrawing: Object-Oriented GraphicsPixels vs. ObjectsSlide 103-D Modeling SoftwareSlide 12CAD/CAM: Turning Pictures into ProductsSlide 14Presentation Graphics: Bringing Lectures to LifeDynamic Media: Beyond the Printed PageAnimation: Graphics in TimeDesktop Video: Computers, Film, and TVSlide 19The Synthetic Musician: Computers and AudioInteractive Multimedia: Eye, Ear, Hand, and MindMultimedia Authoring: Making Mixed MediaInteractive Media: Visions of the FutureSlide 24 2002 Prentice Hall Chapter 7Graphics, Hypermedia, and Multimedia 2002 Prentice Hall 2 TopicsFocus on Computer GraphicsDynamic Media: Beyond the Printed PageInteractive Multimedia: Eye, Ear, Hand, & MindData Compression – How and Why“If you look out in the future you can see how best to make right choices.” Doug Engelbart 2002 Prentice Hall 3 Focus on Computer GraphicsComputer graphics include:Painting SoftwareDigital Image ProcessingDrawing Software3-D Modeling SoftwareCAD/CAMPresentation Graphics 2002 Prentice Hall 4 Painting SoftwarePaint 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. 2002 Prentice Hall 5 Graphics TalkPixels 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. 2002 Prentice Hall 6 Digital Image Processing: Photographic Editing by ComputerSoftware 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 2002 Prentice Hall 7 Building a Photo CollageTake an imageCombine it with other objects Make a statement 2002 Prentice Hall 8 Drawing: Object-Oriented GraphicsDrawing 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. 2002 Prentice Hall 9 Pixels vs. ObjectsBit-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 2002 Prentice Hall 10 Pixels vs. ObjectsObject-oriented drawing gives you these advantages:Better for creating printed graphs, charts, and illustrations Lines are cleaner and shapes are smoother 2002 Prentice Hall 11 3-D Modeling SoftwareUsed 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 anglesCan “walk-through” a 3-D environment that exists only in the computer’s memory 2002 Prentice Hall 12 3-D Modeling SoftwareImages in wireframeview; ones on right are fully rendered to add surface textures 2002 Prentice Hall 13 CAD/CAM: Turning Pictures into ProductsComputer 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 prototypesCheaper, faster, and more accurate than traditional design-by-hand techniques 2002 Prentice Hall 14 CAD/CAM: Turning Pictures into ProductsComputer-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. 2002 Prentice Hall 15 Presentation Graphics: Bringing Lectures to LifePresentation 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 2002 Prentice Hall 16 Dynamic Media: Beyond the Printed PageModern media contains dynamic information--information that changes over time or in response to user input.AnimationDesktop VideoAudio 2002 Prentice Hall 17 Animation: Graphics in TimeEach 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 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. 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. 2002 Prentice Hall 20 The Synthetic Musician: Computers and AudioAudio digitizer-