# colour.difference.JND_CIE1976#

colour.difference.JND_CIE1976 = 2.3#

Just Noticeable Difference (JND) according to CIE 1976 colour difference formula, i.e. Euclidean distance in CIE L*a*b* colourspace.

Notes

A standard observer sees the difference in colour as follows:

• 0 < $$\Delta E^*_{ab}$$ < 1 : Observer does not notice the difference.

• 1 < $$\Delta E^*_{ab}$$ < 2 : Only experienced observer can notice the difference.

• 2 < $$\Delta E^*_{ab}$$ < 3:5 : Unexperienced observer also notices the difference.

• 3:5 < $$\Delta E^*_{ab}$$ < 5 : Clear difference in colour is noticed.

• 5 < $$\Delta E^*_{ab}$$ : Observer notices two different colours.

References

[MT11]