How to split hue difference from the practices that get mixed with it
ΔE is the total difference. ΔH is only the hue. The G7 grey-balance hue is another weighting. Do not fold it into ΔH 3 as one number.
ΔE is the total difference. ΔH is only the hue. The G7 grey-balance hue is another weighting. Do not fold it into ΔH 3 as one number.
It is not the number next to it
Do not let a passing total colour difference stand in for a passing hue. If the hue is off, a grey will not stay grey and skin will look dirty. Get the name wrong and the later adjustment and the statistics will both be wrong.
Split them
| Item | Do this | Do not |
|---|---|---|
| Hue difference | ΔE is the total difference. ΔH is only the hue. The G7 grey-balance hue is another weighting. Do not fold it into ΔH 3 as one number. | Write only a feeling |
| A common mistake | Do not let a passing total colour difference stand in for a passing hue. If the hue is off, a grey will not stay grey and skin will look dirty. | Carry the mistake forward |
| What to keep | The report must include ΔH and say which colour. If you only write ΔE, do not add that the hue also passed. | Leave only the word pass |
Check before you name it
- Confirm the report has ΔH.
- Look at cyan, magenta, and yellow separately.
- If there is no ΔH, do not write that the hue passed.
