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Image Data Type

posted Mar 11, 2010, 3:34 PM by Unknown user
There are two main methods for storing image data (e.g. Screenshots, Graphics on a website, Photographs):
  1. Bitmap: in a bitmap, each individual dot is stored separately. Individual dots are called picture element or pixel for short. The file size of a bitmap depends on two things; the number of pixels and the number of colours. When the number of colours is reduced on a bitmap, an effect is observed called banding.
  2. Vector: rather than storing individual dots, a vector image mathematically represents the shapes and colours in an image. Vector images are almost always vastly smaller than bitmap images.