Tone Transfer Function (TTF)

What is Tone Transfer Function (TTF)?

Tone Transfer Function (TTF) meaning in Digital terms is Any generic functional relation that describes the way light levels (or encoded light levels) are numerically transformed. Examples of tone transfer functions are a film’s characteristic curve that describes how radiant energy is transformed into different levels of film density. Similarly, a gamma function or OECF describes how scene reflectances are related to 8-bit digital count values.


reference: Federal Agencies Digital Guidelines Initiative – Glossary