Multimedia: CS117

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Multimedia CS117

• Lesson 10
• Images

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Before You Create Images

• Plan your approach
• Organize your tools

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Making Still Images

• Stills are drawn in one of two ways

• Bitmaps

• Vector-drawn graphics

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Making Still Images

• Stills are drawn in one of two ways
• Images are usually compressed

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Bitmaps

• Clip art

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Bitmaps

• Clip art
• Bitmap software

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Bitmaps

• Clip art
• Bitmap software

• Capturing

• Scanning

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Vector Drawings

• Vector graphics are defined using formulas

RECT 0,0,200,200,RED,BLUE
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Vector-Drawings vs. Bitmaps

• Vector drawings are easily scaled
• Vector files are usually smaller
• Calculation time can draw resources
• Bitmaps cannot easily be converted to vector
• Vector drawings require plug-ins

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3-D Drawing

• 3-D software usually offers

• Directional lighting
• Motion
• Different perspectives

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3-D Drawing

• 3-D creation tools include

• Ray Dream Designer
• Caligari True Space 2
• Specular Infini-D
• formZ

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3-D Drawing
3-D objects combine various shapes
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3-D Drawing
Shapes can be extruded
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3-D Drawing
or lathed
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3-D Drawing
Gourand shading
Flat shading
Ray tracing
Phong shading
A scene can use different types of shading
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Panoramas

• QuickTime VR

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Color

• Quantum Theory

• Atoms produce unique colors as light passes
  through
• Light travels in the form of photons, or quanta

• Color is the frequency of a light wave

• The rainbow shows the spectrum of visible colors
• Colors below the range are infrared
• Colors above the range are ultraviolet

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Color

• Computerized Color

• Computers combine red, green, and blue (RGB)
  light
• Bit depth determines the number of possible colors

1-bit 2 colors
4-bit 16 colors
8-bit 256 colors
24-bit 16,777,216 colors
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Color

• Computerized Color
• Television Color

• Color is generated using the YUV color model
• Luminance (Y)
• Blue minus luminance (U)
• Red minus luminance (V)

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Color

• Computerized Color
• Television Color
• Print Color

• Color is generated using the CMYK color model
• Cyan (C)
• Magenta (M)
• Yellow (Y)
• Black (K)

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Color

• Color Palettes

• 216 colors are common to 8-bit palettes on
  Macintosh and Windows systems
• Work from a single palette to avoid palette
  flashing
• Colors not in the current palette are dithered

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Image File Formats

• Macintosh Formats

• The PICT format accommodates bitmaps and vector
  graphics

• Windows Formats

• Bitmap formats include BMP, TIFF, JPEG, GIF, PNG

• Cross Platform Issues

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Group Projects
Create a PowerPoint presentation using TEXT
IMAGES ONLY. 10 slides / Static OK! Sports
Product. Target Audience - Adults 25-45