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Basic Concepts of Computer Graphics Software (Part 1)

Basic Concepts of Computer Graphics Software (Part 1). Web Animation and Graphics (MIT3449) Bavy LI. Assessment Scheme. Continue Assessment [ 100% ] around 4 Assignments – 20% Laboratory (several hands-on) – 30% Individual Project Topic Title and Description – 5%

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Basic Concepts of Computer Graphics Software (Part 1)

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  1. Basic Concepts of Computer Graphics Software (Part 1) Web Animation and Graphics (MIT3449) Bavy LI

  2. Assessment Scheme • Continue Assessment [100%] • around 4 Assignments – 20% • Laboratory (several hands-on) – 30% • Individual Project • Topic Title and Description – 5% • Log-Sheet Checking – 5% • Photoshop Usage – 15% • Flash Usage – 10% • Presentation – 5% • Evaluation Report – 5% Basic Concepts of CGS

  3. Major Textbooks – 1 • Photoshop CS for Windows and Macintosh: Visual Quick Guide • Weinmann and Lourekas • http://www.peachpit.com/bookstore/product.asp?isbn=032121353X&rl=1 Basic Concepts of CGS

  4. Major Textbooks – 2 • Macromedia Flash MX for Windows and Macintosh: Visual Quick Guide • Katherine Ulrich • http://www.bestwebbuys.com/0321213440 Basic Concepts of CGS

  5. To launch Photoshop in Macintosh • open the Adobe Photoshop CS folder • drag the Adobe Photoshop CS application icon into the dock • click the Adobe Photoshop icon in the dock Basic Concepts of CGS

  6. Basic Layout of Photoshop CS • Refer to document • vqs-chapter01.pdf Basic Concepts of CGS

  7. Concept of Pixel • Photoshop image is a bitmap • A layer of dots (pixel) of different shades or colors on a rectangular grid • Each pixel represents a color or shade • Pixels can be edited individually • Photoshop is ideal for producing painterly, photographic, or photorealistic images Basic Concepts of CGS

  8. RGB vs. CMYK color – 1 • Red, Green and Blue (RGB) lights are used to display a color image on a monitor – combine them to produce white light. • The primary inks used in four-color process printing are cyan (C), magenta (M), yellow (Y), and black (K). Basic Concepts of CGS

  9. RGB vs. CMYK color – 2 • When choosing colors in Photoshop via the Color Picker or Color Palette, the color models can be • Grayscale • RGB • HSB (hue-saturation-brightness) • CMYK • Lab (lightness, a-component, and b-component) Basic Concepts of CGS

  10. Channels – 1 • Every Photoshop image is a composite of one or more semitransparent, colored-light overlays, called channels. • Photoshop > Preferences > Display & Cursor • check the Color Channels in Color box Basic Concepts of CGS

  11. Channels – 2 • Color adjustment can be made to an individual channel. • Color modifications are normally made and displayed in the multi-channel, composite image. • Special grayscale channels that are used for saving selections as masks, called Alpha Channels Basic Concepts of CGS

  12. Image Modes – 1 • An image can be converted to, displayed in, and edited in any one of eight image modes • Bitmap, Grayscale, Duotone, Indexed Color, RGB Color, CMYK Color, Lab Color, or Multichannel • Image > Mode > … Basic Concepts of CGS

  13. Image Modes – 2 • Color accuracy may diminish if an image is converted back and forth between different color modes. • To preview rather than change the color mode of an image, • View > Proof Setup in conjunction with View > Proof Colors Basic Concepts of CGS

  14. Blending Modes • Refer to online link, • http://www.arraich.com/ref/tool_blend_modes.htm Basic Concepts of CGS

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