Deke’s Techniques 014: Fixing Chromatic Aberrations in Photoshop

Hello friends. So very sorry that I made no post last week. I was attending Photoshop World in Orlando, as well as squeezing in a much-needed vacation with my boys at Walt Disney World. (Why does Disney Inc. insist on the "Walt" before the "Disney World"? Does Scott Kelby call his event "Scott Photoshop World"? No he doesn't.) I'll post pics soon, for those of you who give a mouse's butt. But seriously, we had a magical time.

Meanwhile, this week's technique (from the deep well of video training at lynda.com) exposes that hidden plague of most digital photographs---not to mention old-school film photos---transverse chromatic aberrations.

Here's the official description:

This week's technique from Deke is about using Photoshop to fix a common problem that occurs in photographs, transverse chromatic aberration, otherwise known by its far less daunting name, color fringing. This phenomenon---caused by light breaking up into its primary components---leaves outlines of aberrant color around the edges in your photograph. Have no fear, however, because despite its daunting name, transverse CA is easily fixed in Photoshop. In this week's free movie from Deke's Techniques, Deke not only illustrates how the phenomenon occurs, but shows you how to fix it armed with the Lens Correction filter and a modicum of analytical ability. (Or simple trial-and-error will suffice.)

Check out the before-and-after results on this photo of Venice's Rialto Bridge, and notice how the stripes of color around the statue and windows have disappeared in the image on the right.

Chromatic aberrations before and after

For members of the lynda.com library, this week's exclusive members-only movie will show you a second approach for removing transverse chromatic aberration with Adobe Camera Raw. Either way, it's a quick technique that will help you make quick work of this common problem.

Join us each week for another free technique from Deke!

This week's extra special lynda.com members-only video ("Fixing chromatic abs in Camera Raw") shows you how to correct transverse CA with just two slider bars in ACR instead of three in Photoshop. And with more accuracy. Because, assuming that you're working from a raw image, Camera Raw both develops and corrects the chromatic aberrations. Which is a helluva skill.

But whether correcting in Photoshop or Camera Raw, all is good. Transverse chromatic aberrations are all but impossible to avoid in-camera. And yet easily corrected in the digital realm.

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Comments

Color Fringe

I used to struggle with red fringing around foreground details (like tree branches and leaves) in sunset photos until I developed this technique which relies heavily on the Apply Image command. I'm curious if anyone else has found better approach, or has suggestions for improve this technique.

You can see the process at http://www.youtube.com/watch?v=WbwQsM_2N7E, and there's a link to the video on my website at www.craigstocksarts.com/tutorials.