bitmap

• resolution


  width x height
• metadata


  data about data
• 1 bit depth = 2 colours

  2 bit depth = 4 colours

  3 bit depth = 8 colours

  4 bit depth = 16 colours

  5 bit depth = 32 colours

  6 bit depth = 64 colours

  7 bit depth = 128 colours

  8 bit depth = 256 colours
• upscale just stretches the pixels and lowest the image resolution
• higher resolution = higher quality and higher file size
• a bitmap image is a collection of pixels that represent an image.
• • In a black and white image, each pixel is represented by 1 bit:
  • A 0 will represent a black area.
  • A 1 will represent a white area.
  • The image will be represented by a binary string. Use the value of each bit to colour each pixel in the right colour.
  • The binary string starts at the top-left of the image, and represents the first row, followed by the second row, and continues until the end of the image.
• all images are stored as binary
• What are the two main character sets

  American Standard Code for Information Interchange

  Unicode
• A MAC address is made up of 48 bits which are shown as 6 groups of 2 hexadecimal digits.