Archives for 2016

This is the 31st in a series of posts on color reproduction. The series starts here. We have seen that, with nonlinear profiles, Macbeth color accuracy can be affected by exposure. The purpose of this post is to explore the utility of the automatic exposure systems that are built into modern cameras as a tool… [Read More]

This is the 30th in a series of posts on color reproduction. The series starts here. In some of the testing I’ve been doing, I’ve been varying the intensity of the Westcott LED panels that I’ve been using, and expecting the spectrum of the lights to not change materially. Is that a good assumption? I… [Read More]

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]