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Multimedia Elements – Text and Graphics. Text in Multimedia Applications. Of all multimedia elements, text is the easiest to manipulate General guidelines: Be concise Use appropriate fonts Consider different type styles Be consistent Make the text readable Use restraint.
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Text in Multimedia Applications • Of all multimedia elements, text is the easiest to manipulate • General guidelines: • Be concise • Use appropriate fonts • Consider different type styles • Be consistent • Make the text readable • Use restraint
Working with Text • Be concise – text fills < ½ screen • Large amounts of text • Alternatives? - animation, video, narration. • Show a preview and allow user to request more • Hyper linking • Pop-up messages, scroll bars, drop-down menus
Use Appropriate Type Fonts • Decorative • Hard to read • Used for emphasis • Serif • Creates illusion of a line and guides the eye across the screen facilitating readability • Used on large blocks of text • San serif • Clean, simple • Good for headings
Examples of: Serif, Sans Serif, and Other Fonts Scanned image: from Multimedia Concepts – James Shuman
Font Type Styles • Type styles: bold, italic, underline • Used for emphasis • Use for links – hypertext • Be consistent • Similar headings – typeface, size, style • Use same font for similar sections • Graphic image for headings Consistency vs. file size
Make Text Readable - Use Restraint • Choose fonts found in most systems • Avoid “ransom note” effect • Choose only up to four variations of type styles, fonts and sizes
Creating and Editing Text • Word Processor • Corel Draw • Adobe Illustrator • Scanner • OCR-Optical Character Recognition
Using Text on the Internet • Microsoft IE and Netscape determine the fonts of your web page • To ensure text is displayed in the desired way: • Use a font set • Use a Cascading Style Sheet • Embed it in your Web pages • Change the text into an image
Graphics in Multimedia Applications • Graphical images - used to add emphasis, direct attention, illustrate concepts, and provide background content • Two types of graphics: • Draw-type graphics or vector graphics – represent an image as a geometric shape • Bitmap graphics – represents the image as an array of dots, called pixels
Draw Type Graphics • Draw type or vector graphics • Geometric shape stored as set of instructions • Smaller than bitmap • Resize, rotate, no distortion • No photo quality
Draw-type Example Scanned image: from Multimedia Concepts – James Shuman
Bitmap Graphics • Bitmaps – array of dots or pixels • Color depth per pixel • High quality pictures • Photo realistic • Larger than draw-type • File size = pixels x color depth / 8
Graphic Image File Sizes • Image file sizes can become large, you must balance the need for quality images with the need for small file sizes
Graphics Software • Drawing programs – used to create draw-type graphics • Paint programs – used to create bitmap images • Image editing programs – useful in making changes, or applying textures or patterns to existing images
Graphics Software Programs • Drawing programs – Adobe Illustrator • Paint programs – Paint Shop Pro • Image-editing programs – Photoshop (does the work of all 3)
Graphics Programs Features • Graphics types • Compatibility • Graphics files – tiff, jpeg, bmp, gif … • Layers • Image enhancement • Selection tools • Color adjustments
Graphics Programs Features (Cont.) • Image manipulation • Filters • Antialiasing • Smoothes edges by blending colors • Text support • Hardware support • Open architecture
Using Graphics on the Internet • Techniques to speed transfer times • File compression – reduces the file size of a graphic • Load images in stages • Use thumbnails • Use image editing programs
Graphic Image Sources • Alternative image sources • Clip art • Stock photographs • Video images • Still images • Scanned images • Photo CD’s • Screen-capture programs
Other Resources • Some of the sources for font shopping • EyeWire (www.eyewire.com) • garageFonts (www.garagefonts.com) • LetterSpace (www.letterspace.com) • BitStream (www.bitstream.com) • MyFonts (www.myfonts.com) • T26 (www.tw6.com) • P22 (www.p22.com) • FontHaus (www.fonthaus.com)
The End University of North Texas Dr. Vicky Cereijo