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Bitmap and Vector Graphics
Bitmap GraphicsBitmap Graphics
• Photos• Scanned Images• Animations• Most pictures you find on the Internet
Photos are JPG files – lots of colours
Animations and some cartoons are GIFs – fewer colours, smaller files
Bitmap and Vector Graphics
BitmapsBitmaps• Made from a
series of small dots.
• Like graph paper with squares filled in to form an image.
Bitmap and Vector Graphics
What’s the problem?What’s the problem?
When bitmaps are enlarged – you lose quality.
Bitmap and Vector Graphics
What’s the problem?What’s the problem?
Cartoons and GIF Cartoons and GIF animations become animations become pixelatedpixelated – this – this means you can see means you can see the outline of the the outline of the squares used to squares used to make the picture.make the picture.
Bitmap and Vector Graphics
What’s the problem?What’s the problem?
Photos appear Photos appear blurryblurry
Bitmap and Vector Graphics
Vector GraphicsVector Graphics
• Vector graphics are stored in the computer using the mathematical information about the lines, curves, colours etc.
• Most windows clipart (with a WMF file extension) is a vector graphic.
• AutoShapes are also vector graphics.
Bitmap and Vector Graphics
What’s so great about What’s so great about vectors?vectors?
They can be enlarged with no loss of quality
Bitmap and Vector Graphics
When should you use When should you use each?each?
• Photos and scanned images will always be bitmaps.
• If you want subtle changes in colour, use bitmaps.
• If the image must work in different sizes, use vectors.
Bitmap and Vector Graphics
Bitmaps & Vectors in Bitmaps & Vectors in FireworksFireworks
Oval & Square Marquee
Magic Wand
Pencil
Paintbrush
Lasso Tool
Eraser
Sharpen & Blur Rubber Stamp & Red-Eye Removal
Bitmap Tools
Vector ToolsLine
Shapes
Freeform
Pen & Vector Path
Text
Knife
Bitmap and Vector Graphics
File ExtensionsFile Extensions
.bmp
.jpg
.gif
.png
.wmf
.mix
Bitmaps Vectors
Joint Photographic Group
Graphics Interchance Format
Windows Metafile Format