In 1991, I noted the phenomenon that Wells calls combing, came up with a few ways to artfully trade off image resolution for reduction or elimination of the effect, and submitted a patent disclosure to my employer. They weren’t interested in patenting the ideas, but instead published it in order to keep anyone else from… [Read More]
Histogram depopulation in image editing, part 1
The penultimate paragraph in the David Wells photo techniques article that I have been discussing is the following: The point is to get a good exposure for a raw file, even if it looks too light as seen on the back of your camera. Do this to avoid a “combed” histogram which results when you… [Read More]
Charlie Cramer on Lightroom 4
If you only read one post on the new tone controls in Lightroom 4, make it this one. Charlie Cramer has brought his artist’s sensibilities and extensive practical experience to the party, and he’s gone the extra mile and included screen shots of what happens when you apply various controls to photographs of step wedges. It’s… [Read More]
The fog comes back
I had an unusual thing happen yesterday. I made some infrared images of the fog burning off, changed to a visible light filter, and set up for some clouds down the valley. Then the fog came back. Time runs from right to left.
How many tones above the midpoint in your camera’s histogram?
This is a continuation of a previous post that dealt with an article in the March/April 2012 issue of photo technique entitled “Mastering the Camera Histogram for Better Exposure”. The context of the article is how to obtain the best exposure of a raw file. In a section of the article headed “Histogram Math” Wells… [Read More]
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