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Bitmap vs. Vector

Bitmap vs. Vector . How computers work with photographs and drawings. What are images?. Photographs (scanned, downloaded) Pictures (drawn, painted) Movies (videos, animation). What are our options?. Bitmaps Vector-based. Definition: Bitmap. Bitmapped images:

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Bitmap vs. Vector

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  1. Bitmap vs. Vector How computers work with photographs and drawings

  2. What are images? • Photographs (scanned, downloaded) • Pictures (drawn, painted) • Movies (videos, animation)

  3. What are our options? • Bitmaps • Vector-based

  4. Definition: Bitmap • Bitmapped images: • Photographs, computer paintings, videos • Specific number of dots (or pixels) across and down (160 x 120, 800 x 600, 1400 x 1050) • Dots spread out or squeeze together as image size changes • Number of dots remains the same • Photoshop, Paint, QuickTime

  5. “Maps” of Dots

  6. “Maps” of Dots

  7. “Maps” of Dots

  8. Bitmap Examples

  9. 100% (900 x 983 dpi) 200% 500% Making Bitmaps Bigger

  10. Warning! Warning! • DPI is critical! • Printers: 300 dpi, 600 dpi • Monitors: 72 dpi (Internet pictures) • If you download a picture from the Internet to print out, make sure it’s BIG!

  11. Definition: Vector • Vector-based image: • Drawings, animation • Points, lines, fill, shapes • Instructions to computer • Quality remains same as image size changes • Illustrator, Word “draw”, Corel Draw

  12. Points, Lines and Fill

  13. Vector Examples

  14. 100% 200% 500% Vector Image

  15. Bitmap Photographs Dots (pixels) Photoshop Vector Drawings Points, lines, fill Illustrator Bitmap vs. Vector

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