Images

• Images are represented by a form of encoding similar to ASCII and Unicode
• Images are made up of pixels
  • The resolution of an image is the number of pixels in an images
    • This is found by multiplying the width by the height
    • A higher resolution means more detail
• The number of colors that can be represented in a pixel is determined by the color depth
  • To calculate the number of colors in pixel available, you must use \(2^n\)
    • Where n is the bit depth
• To calculate the size of an image (in KiB), use the formula: \(\frac{width \times height \times bit\ depth}{8 \times 1024}\)
• Bitmap images are images made up of pixels
  • If bitmap images are resized, the quality decreases
• Vector images are made from mathematical calculations
  • They can be resized losslessly
• Metadata is data about data
  • For example, information about when a file was created