Images

Images

1. Vector

   • Doesn't store data as pixels like bitmaps
   • A set of instruction for drawing a geometric shape
   • File size
     • Smaller files than bitmap
   • Positives
     • Can be scaled without loss of quality
     • Small file sizes
   • Negatives
     • Limited to geometric shapes

2. Bitmap

   • Thousands of small coloured dots called pixels
     • Pixels
       • Pixels is short for picture elements
       • Each pixel holds a binary value for what colour it is
       • Bitmap images are stored as an array of pixels
   • File size
     • Relatively large files
   • Positives
     • Can illustrate complex shapes
   • Negatives
     • Large file size
     • Pixelates when enlarging

3. Resolution

   • The greater the resolution the greater the quality of the image but the larger the file

4. Metadata

   • Refers to 'data about data'
   • Stores data such as:
     • Image height
     • Image width
     • Image colour depth
     • Date image was made
     • Where the photo was taken (geotag)
   • Without metadata a computer may be render an image incorrectly, such as displaying pixels all on one row