the last word

This is the 29th in a series of posts on color reproduction. The series starts here. Some have suggested making a different profile for every ISO setting that you use. Sounds like a lot of work to me. That’s undebatable. What is debatable is whether it’s necessary. I thought I’d find out, for one camera,… [Read More]

This is the 28th in a series of posts on color reproduction. The series starts here. Yesterday I posted the results of making color accuracy assessments of Macbeth chart images exposed over a one-stop range with the Adobe Standard profile and one derived from it that purported to be linear. The results were quite poor,… [Read More]

This is the 27th in a series of posts on color reproduction. The series starts here. The day before yesterday, I posted a series of analyses of Macbeth ColorChecker images that showed that repeatablility was very good when the lighting, the camera position, and the exposure remained constant. However, we’ve see before in this series… [Read More]

This is the 26th in a series of posts on color reproduction. The series starts here. In discussions on DPR about analyzing Macbeth chart photographs, someone whose opinion I respect raised the issue of repeatability of the results. I thought I’d start with the basics, and made a series of 16 photographs of the chart… [Read More]

This is the 25th in a series of posts on color reproduction. The series starts here. I’ve cleaned up the u’v’ plot from yesterday a bit, and have done CIELab and CIELuv chromaticity representations of the three-way camera/profile/raw developer comparisons. Here they are:     I added the color shadings to the Lab and Luv… [Read More]