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Digital Media: COMS 106. Images [email protected] Digital Media. Before You Create Images. Plan your approach Organize your tools. Digital Media. Making Still Images. Stills are drawn in one of two ways. Bitmaps. Vector-drawn graphics. Digital Media. Making Still Images.

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Digital Media: COMS 106

Images

[email protected]


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Digital Media

Before You Create Images

Plan your approach

Organize your tools


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Digital Media

Making Still Images

Stills are drawn in one of two ways

  • Bitmaps

  • Vector-drawn graphics


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Digital Media

Making Still Images

Stills are drawn in one of two ways

Images are usually compressed


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Digital Media

Bitmaps

Clip art


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Digital Media

Bitmaps

Clip art

Bitmap software


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Digital Media

Bitmaps

Clip art

Bitmap software

Capturing

Scanning


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Digital Media

Vector Drawings

  • Vector graphics are defined using formulas

RECT 0,0,200,200,RED,BLUE


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Digital Media

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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Digital Media

3-D Drawing

3-D software usually offers:

  • Directional lighting

  • Motion

  • Different perspectives


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Digital Media

3-D Drawing

3-D objects combine various shapes


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Digital Media

3-D Drawing

Shapes can be extruded…


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Digital Media

3-D Drawing

…or lathed


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Digital Media

3-D Drawing

Gourand shading

Flat shading

Ray tracing

Phong shading

A scene can use different types of shading


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Digital Media

Panoramas

QuickTime VR


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Digital Media

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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Digital Media

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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Digital Media

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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Digital Media

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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Digital Media

Image File Formats

TIFF or .tif or Pict or .pic

JPEG or .jpg

GIF or .gif

Cross Platform Issues

Internet Issues


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Digital Media

Image Software


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Digital Media

Assignment for this week!!!


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