This document provides an overview of text in multimedia applications. It discusses the tradition of text in print, computer text codes like ASCII and Unicode, font technologies like bitmapped and outline fonts, and the different types of multimedia text like editable and graphics text. It also covers guidelines for using text in multimedia, such as being brief, consistent, and combining text with other media. Key terms related to text properties, computer text, font technologies, and multimedia text are defined.
Esoft Metro Campus - Diploma in Web Engineering - (Module II) Multimedia Technologies
(Template - Virtusa Corporate)
Contents:
What are Graphics ?
Digital Image Concepts
Pixel
Resolution of Images
Resolution of Devices
Color Depth
Color Palette
Dithering
Bitmap and Vector Graphics
Bitmap Graphics
Vector Graphics
Comparison
Graphics File Formats
Bit Map
Tagged Image File Format
Graphical Interchange Format
Join Picture Expert Group
Portable Network Graphics
Multi-image Network Graphics
Multimedia on Web
Animations
Rollovers
Animated GIF
Flash Files
Audio
Audio on Web Sites
Audio File Formats
MIDI
WAVE
MP3
AU
AIFF
Video
Video File Formats
AVI
ASF
MPEG
QuickTime
RealVideo
Copyrights of Web Content
Software for creating and displaying multimediaJess Matikainen
Click on 'get file' for the quality presentation. This is a continuation from 'HARDWARE FOR CREATING AND DISPLAYING MULTIMEDIA'. This powerpoint will draw into Presentation software, Application software, Authoring software, Animation software, Web browsers and HTML editors. Once again, this is for a school assignment and any comment is appreciated.
Esoft Metro Campus - Diploma in Web Engineering - (Module II) Multimedia Technologies
(Template - Virtusa Corporate)
Contents:
What are Graphics ?
Digital Image Concepts
Pixel
Resolution of Images
Resolution of Devices
Color Depth
Color Palette
Dithering
Bitmap and Vector Graphics
Bitmap Graphics
Vector Graphics
Comparison
Graphics File Formats
Bit Map
Tagged Image File Format
Graphical Interchange Format
Join Picture Expert Group
Portable Network Graphics
Multi-image Network Graphics
Multimedia on Web
Animations
Rollovers
Animated GIF
Flash Files
Audio
Audio on Web Sites
Audio File Formats
MIDI
WAVE
MP3
AU
AIFF
Video
Video File Formats
AVI
ASF
MPEG
QuickTime
RealVideo
Copyrights of Web Content
Software for creating and displaying multimediaJess Matikainen
Click on 'get file' for the quality presentation. This is a continuation from 'HARDWARE FOR CREATING AND DISPLAYING MULTIMEDIA'. This powerpoint will draw into Presentation software, Application software, Authoring software, Animation software, Web browsers and HTML editors. Once again, this is for a school assignment and any comment is appreciated.
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2. CHAPTER HIGHLIGHTS
• Text tradition.
• Codes for computer text.
• Font technologies.
• Multimedia text.
• Guidelines for use of text in multimedia.
2
3. POWERS OF TEXT
• Multimedia developers value text for:
– Universality
– Clarity
– Efficiency
– Powers of abstraction, engagement, and
suggestion.
• Developers can explore new uses for text in a
media-rich environment.
3
4. TEXT TRADITION
Text properties are grounded in the print
tradition.
• Typeface is a family of characters sharing a
common design.
– Arial
– Chicago
– New York
– Palatino
4
6. TEXT TRADITION
• Style: appearance of characters such as:
– Bold
– Italic
– Underline.
• Point size: measure of type size.
6
Point is approximately 1/72 of
an inch.
Pica is 12 points
6 picas = 1 inch.
7. TEXT TRADITION
• Font
– Complete set of characters of a particular typeface,
style, and size.
– Monospaced fonts: same width assigned to each
character.
– Proportional fonts: adjust width based on shape.
• Case
– Upper and lower case.
7
A a
8. TEXT TRADITION
• Weight
– Line thickness of the typeface.
– Arial Black has heavier weight.
• Kerning
– Adjusting spacing between specific letters.
• Tracking
– Adjusting spacing between all characters.
8
9. TEXT TRADITION
• Condensed/extended text
– Narrow width of text / widen width of text.
• Leading
– Spacing between lines.
• Alignment & Justification
– Alignment positions text relative to document's
margins.
– Justification adjusts line length to produce straight
edges on left and right margins.
9
11. COMPUTER TEXT CODES
• Coding schemes assign a group of binary
numbers to represent a digital character.
• ASCII
– 7-bit code = 128 characters.
– Extended ASCII or ASCII-8
= 256 characters.
• All computers understand ASCII.
11
American Standard Code for Information Interchange
12. COMPUTER TEXT CODES
• RTF (Rich Text Format)
– Developed by Microsoft for cross platform text
files.
– Reproduces the formatting of original file.
• Unicode
– New standard 16 bit code that provides for more
than 65,000 characters.
– Goal is to include multilingual text
in a digital coding standard.
12
View IT
Unicode
project.
13. FONT TECHNOLOGIES
• Two techniques for displaying text on
computer:
– Bitmapped fonts
– Outline fonts.
13
14. BITMAPPED FONTS
• Pixels that make the letter are described by a
binary code, or a "mapping" of the character.
– Every character is stored as a bitmapped letter,
number, or symbol.
– Require large memory and storage capacity.
14
15. BITMAPPED FONTS
• Advantages
– Precise control over letter appearance.
– Letters can be edited at pixel level.
• Disadvantages
– Letters can't be easily scaled.
– Requires separate bitmaps for each typeface, style,
and point size to be used.
– Requires large storage capacities.
– Limits flexibility in use of text fonts to those stored on
the computer.
15
16. OUTLINE FONTS
• Store a description of the character to be
displayed.
– Description is a series of commands to create the
letter on the computer display.
• Outline font technology:
– Adobe Postscript
– TrueType.
16
17. OUTLINE FONTS
• Advantages
– Fonts are easily scaled.
– Requires smaller storage capacity.
• Disadvantages
– Commands can't be edited to create unique
characters.
– Font families are controlled through license of
Postscript and TrueType fonts.
17
18. JAGGIES and TEXT
• Text is displayed on a monitor as a pattern of
pixels.
– Pixels are generally very small squares.
– Squares can display straight lines with smooth
edges.
– Squares that display curved or diagonal lines
produce a stair-stepped effect called JAGGIES.
18
19. ANTI-ALIASING THE JAGGIES
• Jaggies produce an alias of the true character.
• Anti-aliasing creates a smooth edge by
blending the color of the text with the color of
the background.
19
20. INSTALLED FONTS — THE PROBLEM
• ASCII and Unicode are standard.
• Fonts are not standardized across computer
platforms.
– If the font is not available on the computer, it will
substitute one that is.
– The result may not be acceptable.
• Solution
– Use only widely available fonts.
– Package the unique font with the application.
20
21. MULTIMEDIA TEXT
• Two main forms:
– Editable: text produced by word processors or text
editors.
• Easy to alter content.
• Can search and spell check.
– Graphics: image of text that can be manipulated
to produce a wide range of artistic effects.
• Make original word picture.
• Solves problem of installed fonts.
21
22. MULTIMEDIA TEXT and SOUND
• Speech recognition: software analyzes human
speech and converts words to editable text.
– Requires specialized "intelligent" software.
– Accuracy may depend on training and speaker's
voice.
• Speech synthesis: software analyzes text and
reproduces it as spoken words.
22
23. TEXT & INTERACTIVITY
• Hypertext is linked text.
– User interacts with links to trace relationships of
words and ideas created by the author.
• Structure consists of:
– Nodes
– Link anchor
– Link markers
• Hypermedia is an information structure based
on linked media.
23
Hyperlink
text can
take you
places.
24. TEXT FOR THE WWW
• HTML: hypertext markup language.
– Contains "tags" used to specify the structure of the
document and format the text and media.
– Browser interprets the "tags" and displays the "page"
on a client computer.
• HTML limitations:
– Limited set of tags to create a page.
– Difficult to precisely define a page appearance.
• Some browsers and client computers may present the html
page differently from other browsers.
24
25. CSS & XHTML
• Cascading Style Sheets (CSS).
– An addition to HTML
– Separates content of page from formatting
commands
– Easier to edit and maintain consistent appearance
of a site.
• eXtensible HTML (XHTML)
– A blending of HTML and XML
– XML supports more powerful data manipulation.
– XHTML improves page display on mobile devices.
25
26. PORTABLE DOCUMENT FORMAT
• PDF files maintain original formatting of
documents across computer platforms.
– Platform and application independent.
– Support multiple media and user interaction.
– Require a reader program to view the file and an
application to convert a document to pdf format.
• Adobe Acrobat Reader is a free download.
• PDFCreator is a free open source converter.
26
27. ADDING TEXT TO MULTIMEDIA
APPLICATION
Several methods to incorporate text in an
authoring application.
– Direct entry in a text box or text field.
– Copy and paste from existing text source.
– File import for large text files.
– Scan text with OCR application for text that exists
only in print media.
• Optical Character Recognition accuracy will vary based
on fonts and quality of source material.
27
28. GUIDELINES for TEXT
in Multimedia Applications
• Be selective.
• Be brief.
• Make text readable.
• Be consistent.
• Be careful
• Be respectful.
• Combine text with other media.
• Make text interactive.
28
29. WRAP UP
• Traditional text features.
• Computer text codes.
• Font technologies.
• Multimedia text.
• Adding text to multimedia applications.
• Guidelines for using text.
29
30. KEY TERM CHECK UP
30
Alignment
Anti-aliasing
ASCII
Bitmapped fonts
Browser
Case
Condensedtext
Editable text
Extendedtext
Font
Font technologies
Graphics text
HTML
Hypermedia
Hypertext
Jaggies
Justification
Kerning
Leading
Link anchor
Link markers
Monospaced font
Nodes
OCR
Outline fonts
PDF
Point
Proportional font
RTF
Sans serif
Serif
Speech recognition
Speech synthesis
Style
Tracking
Typeface
Unicode
Weight
XHTML
XML