32. Inverting ICC Profiles

  1. Phil Green MSc, PhD Reader member

Published Online: 11 FEB 2010

DOI: 10.1002/9780470688106.ch32

Color Management: Understanding and using ICC Profiles

Color Management: Understanding and using ICC Profiles

How to Cite

Green, P. (ed) (2010) Inverting ICC Profiles, in Color Management: Understanding and using ICC Profiles, John Wiley & Sons, Ltd, Chichester, UK. doi: 10.1002/9780470688106.ch32

Editor Information

  1. London College of Communication, UK

Publication History

  1. Published Online: 11 FEB 2010
  2. Published Print: 12 FEB 2010

Book Series:

  1. Wiley-IS&T Series in Imaging Science and Technology

Book Series Editors:

  1. Michael A. Kriss

ISBN Information

Print ISBN: 9780470058251

Online ISBN: 9780470688106

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Keywords:

  • International Color Consortium (ICC) Profiles;
  • lookup table (LUT);
  • roundtrip

Summary

The International Color Consortium (ICC) specification ICC.1:2004-10 states that: “In general, the BToAxTags represent the inverse operation of the AToBxTags”. This chapter provides further clarification on this statement in situations where its intention may be unclear. In profiles where only a matrix/TRC transform is provided, the inverse is computed by the CMM. A v2 or v4 LUT-type transform is normally non-invertible, and hence the inverse transform is explicitly encoded in the profile; for example, the inverse of a lutAToBType is encoded in the lutBToAType in the same profile. By performing a roundtrip test on a set of sample colors within the effective gamut, it is possible to obtain an indication of the accuracy of inversion in a profile. This test can be carried out for all rendering intents.

Controlled Vocabulary Terms

image colour analysis; table lookup