Quantization is the process of constraining an input from a continuous or otherwise large set of values (such as the real numbers) to a discrete set (such as the integers). The term quantization may refer to:

• Quantization (signal processing), in mathematics and digital signal processing
  • Quantization (image processing)
    • Color quantization
  • Vector quantization
  • Quantization (music)

• Quantization (physics)
  • Canonical quantization
  • Geometric quantization
• Discrete spectrum, or otherwise discrete quantity
  • Spatial quantization
  • Charge quantization

• Quantization (linguistics)

• Quantification (science)