This is the 21st in a series of posts on color reproduction. The series starts here. I’ve spent most the last week writing Matlab code to automate the Macbeth chart measurements that I came up with earlier, and also adding some new ones. My goal here is to provide numeric and visual measures of how… [Read More]
Archives for 2016
Picking the wrong reference for colorchecker analysis — an extreme example
This is the 20th in a series of posts on color reproduction. The series starts here. X-rite publishes ColorChecker reference color values by illuminating their targets with D50 light, not by publishing the spectral responses for each patch. If you want to convert the X-Rite values to a color space with a white point that’s… [Read More]
Hills in color
A few color images I’ve developed over the last couple of days. Most of them were exposed at dawn. No composites here.
Is sensor technology maturing?
Maturing, in the negative sense, aka slowing down. One of my former employers, IBM, had a similarly Orwellian take on language from time to time. One of my favorites was “stabilize”, as in “We’re gonna stabilize that product line.” Sounds good, right? What it actually meant was that we’re going to stop making improvements, and,… [Read More]
Fog across the way
Yesterday, just before noon, I noticed some fog forming on the hills across from my house. I ran outside with my color Sony a7II — the IR cameras cut through the fog, which is not what I wanted — and got about ten minutes of making exposures before the fog blew away. Here are three… [Read More]
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