FIT100
Positional Notation
The RGB intensities are binary numbers
Binary numbers, like decimal numbers, use place notation
• 1101 = 1x1000 + 1x100 + 0x10  + 1x1
• = 1x103   + 1x102  + 0x101 + 1x100
except that the base is 2 not 10
• 1101 = 1x8  + 1x4   + 0x2  + 1x1
• = 1x23 + 1x22 + 0x21 + 1x20
1101 in binary is 13 in decimal
Base or radix