2 ObjectivesExplain why graphic images are vital to multimedia applicationsList the different ways graphics can be used in multimedia applicationsDescribe the different technologies that can be used to capture digital imagesList several sources of still imagesList the four items that should be logged in reference to graphic imagesDiscuss the responsibilities of a graphics designerDefine common terms used in computer graphicsDescribe some of the common tools found on a tool palette
3 ObjectivesExplain the difference between paint programs and draw programsExplain the difference between bitmapped graphics and vector-based graphicsDescribe several features of common graphics programsExplain jaggies and how they occurExplain the process of creating 3D graphicsDiscuss the different types of images that can be used in a multimedia applicationDiscuss the two different types of resolution related to graphic imagesExplain several disadvantages of high resolution graphicsDiscuss copyright law as it applies to graphic images
5 Digitized Imagesconverting images into a format the computer can understandseries of 0’s and 1’s
6 Methods of Creating Graphics Draw ProgramsPaint ProgramsScannersVideo Capture CardsSnappyPhoto CD
7 Types of Images Line Art - black and white/flat colors Grayscale levels of grayColor - 4-bit to 36-bit (RGB)2D or 3D - (3D Web = VRML or Live3D)Hypergraphics - (image map)
8 Image Quality bit or color resolution number of colors in each pixelalso called bit or pixel depthmost common ranges are 8-, 16-, and 24-bitimages with greater bit resolutions will be more colorful and of higher qualityimage resolution (measured in ppi)amount of information stored for each image
9 Image Compressioncompression - an algorithm used to create smaller file sizeslossy - expendable data is actually lostlossless - none of the data is actually lost; mathematical algorithms eliminate redundant data.
10 Graphics Software Paint Programs and Bitmapped Graphics Features stored as pixelspixels record the screen location and color value on a bitmapjaggies/staircasingFeaturesGeometric FiguresEditAdd Color and PatternsCut and PasteRotate and Stretch
11 Graphics Software Draw Programs and Vector Graphics Features vector-based images - created and recreated from mathematical modelsFeaturesFully Editable ShapesBézier CurvesGradient FillBlendingGrouping ObjectsRasterize
12 Graphics Software 3D Modeling Programs Features 3D objects - created using geometric forms or wire frame modelssurfaces/textures are mapped to the modelsrendering - converting 3D images to 2DFeaturesModelingArranging and Deforming ObjectsShadingSetting Lights and CamerasRendering
13 3-D Drawing 3-D software usually offers: Directional lighting Motion Different perspectives
21 Sources of Still Images Commercial Image Providers/Stock Photography HousesClip ArtPhotographsDigital VideoChartsMaps
22 Copyright assume an image is copyright protected 1976 Federal Copyright Actproperty of the creator to 50 years beyond his or her life.if the creator is a corporation or business, up to 75 years after publication or 100 years following creation, whichever is shorter.
23 CopyrightPublic domain images can be manipulated and used without permission from the artist and without having to pay the artist any royalties for using themFair use policy - instruction/education exclusions
24 Copyright SummaryThe only time you can alter or manipulate images is if:you receive permission from the original artistyou create the image yourselfthe image is clearly public domainthe image is being used strictly for instructional purposes in an educational setting