Konstantin Pyanzin wrote:
New "ccmxmake" utility and new "-X" option for spotread/dispcal/dispread are great. But I think that a database of contriibuted correction matrices is ineffective, taking into account bad inter-instrument agreement for colorimeters.
Well, frankly, I'm pessimistic as to the usefulness (mainly due to the fact that few people are in a position to make the matrices, and they have little motivation to do so), but I thought that rather than second guessing, I'd put it out there and see what happens. There's not a whole lot to be done about intra-instrument agreement (meaning agreement between different instances of the same make and model), but perhaps ccmx's can be useful "on average" none the less. Technically, a more sophisticated approach would be to characterize the spectral sensitivities of each type of colorimeter, and then only the spectral characteristics of the display colorants would be needed to be able to calculate the necessary correction matrices. The advantage is that only one measurement is needed per display, and the measurer doesn't have to have any or all of the colorimeters, just a spectrometer. The problem is that instruments to measure spectral sensitivities aren't easily come by, and are generally very expensive. Graeme Gill.