David, I am not quite sure what your question is about. What exactly do you want to match or predict? Spectra, tristimulus values or colour appearance? After a quick scan of Berns's article I admittedly have not understood very much of it, but it seems to me he dealt with the question how to match tristimulus values or spectra from different colourants (under a given illumination except for self-luminous colours). There is a short discussion of metamerism. Is that what you mean with "predictive failures"? To model such failures seems not too difficult, but to avoid them is a challenge.

Dear Sir,

You're perfectly right, The problem is the colour computing based on Newton. In 1987, When I made sculptures I was in front of a Problem. For my sculptures I used as material the painting in a space. When I used black and white , it worked very well. I was able to built a virtual object observed in the space.

But When I used colour it became a mass of unformed colours.

So I reorganised the colours in the space and observed they did not follow the newton spectrum and where dynamic together. I organised the colours in What I called the théorie of the Dynamic colours, never published.

Laurent Nottal I met, used this for his "théorie of the dynamic chaos".

I met Jacques Lewiner Who wanted me to publish. but the death of André Marion with whom I worked let me alone in my little laboratory.

I have developed a new colour synthesis and developed "the colour dynamic mecanisme". I need to work with a new peer to be able to publish. But, for now, I have no time to find one. I was burgled by many firmes and institutes each time i contact them so , in 2000 I decided to stop all contacts and developpe in my laboratory.

If you are interested by my works look at My web site www.albert-jobbeduval.com.

i usse some little tools i built for art work imaging.

Best regards

Albert Jobbé duval

Hi David,

If you are interested in a colour mixing model , you can consider a colour appearance model (CAM) maybe. Although Berns' generic model includes more complicated reflectance functions (e.g. corrections for refractive index discontinuities), CAMs have a wider scope in terms of visual phenomena (e.g. saturation, brightness changes, adaptation).

Are you looking for collaborators in colorimetry?

Dear Detlef, Albert and Alp,

Thank you all for your interesting queries. I have spent many years studying and developing colorimetric models concentrating mainly on colour identity and colour match prediction, for example as specified by CIE Standard Observer X,Y,Z tristimulus values. Virtually all the colour difference and colour appearance models use CIE XYZ values as a scalar basis and I have shown (see my PhD thesis) that as such some key ambiguities and failures of definition are introduced into the modelling process. Further, CIE colorimetry thus specified is a strictly three dimensional model and therefore other than by modelling metameric (or conditional) visual equivalence by tristimulus sum, it cannot be used to go any deeper into metameric modelling. The initial mission would be to characterise and classify all the relevant ambiguites and failures of definition and the wider goal would be create new models of them for publication and consideration for general use. See also the added PDF file.

Dear David,

It's quite long and quite complexe to go from the state of the art in colour computing to the colour reality. So, I will write a little draft to explain my way of research and send it as soon as it's finished.

Best regards

Albert

thank you Albert, I look forward to reading it.