What is the real implication of the calculated index Total Color Difference in color measurement with CIELab?

At first you must prepare a fully light platform as standard and apply L,a, b values of it in the formula...

There are better indicators than Delta E or color difference like yellowness and whiteness , also i think that being more than 5 is a criteria for delta E difference

take a look at

Thanks everyone for the answers!

Ehsan Moghaddas kia:

I thought yellowness was part of the b* parameter.

Do you have a reference for the calculated Yellowness and Whiteness?

Thanks.

Felipe Reis:

Thanks for your advice. You are right, the best alternative is a sensory test for color difference. However, I can not do the analysis because the samples are not available anymore. It is a pity.

Maurizio Grassi:

Could you inform the reference for the Delta E00 parameter. I read the Konica Minolta Manual "Precise Colour Communication" but I did not find it.

Thanks.

You will find various indexes for color difference in the Minolta technical note "Color Spaces" (RIO-TNE-005) ; you can also visit the website www.brucelindbloom.com in the page calc

We have done many works on the issue. You can check my publications where we used for comparison purpose. In fact, it can provide you the magnitude of difference among different treatments or even you can compare among samples. There is no hard and fast rule for using color difference values (delta E) rather you can use the color parameter say -a for green or +a for red. These parameters you can use to describe color degradation during processing or comparison purposes.

If you need any related paper let me inform I can provide you.

Thank you.

Total color difference indicated the changes of normalized L*, a* and b*. For better results, you can compare images at MATLAB using Image Processing Toolbox. See

León, K., Mery, D., Pedreschi, F., & León, J. (2006). Color measurement in L∗a∗b∗ units from RGB digital images. Food Research International, 39 (10), 1084-1091.

Thanks Maurizio Grassi, Jasim Ahmed and Mohammad Nadian for providing valuable informations.

Hi Antonio

two References:

1) https://www.researchgate.net/publication/257890462_Espectrocolorimetra_en_caracterizacin_de_leche_y_quesos?ev=prf_pub

In this paper you can find the discussion about Total color difference:

2) https://www.researchgate.net/publication/257890720_CHARACTERIZATION_OF_COLOMBIAN_QUESILLO_CHEESE_BY_SPECTROCOLORIMETRY?ev=prf_pub

Reference for the calculation Yellowness and Whiteness Indexes

Hello Antonio. I have ever had a similar doubt. I was reading about this topic, and I think that there is not a number, because it depend on the Chroma where are you working.

I give you here a link that perhaps could help you.

Best regards

Thank you very much Macarena Egea! Your answer was the best one!

The text is concise and clarifies about intrumental X human eye color difference.

Now I'm able to better discuss my results.

Thanks again!

Thanks Juan Ramírez-Navas for the reference for Yellowness and Whiteness Indexes.

Your welcome!

It was a little headache for me this topic.

I'm glad to help you out.

Best Regards

Com muito prazer!!!

Dear Antonio,

There are a lot of texts considering your question. It depends on the color difference equation that you apply. For example the acceptable threshold for DELAB is more than DECMC or DE2000. For example for DELAB it is 1 but for DECMC it is 0.5. For color assessment I recommend you to use DE2000.

Good luck