noise

Deke's Techniques 631: Processing the Great American Eclipse

Deke's Techniques 631: Processing the Great American Eclipse

In this week's free Deke's Techniques episode, Deke reveals how he developed one of his total eclipse photos in Photoshop/Camera Raw. Yesterday, I recounted our adventure leading up to this photo, but here is Deke's recipe for what comes after (besides a good Nebraska steak and hot tubbing under a blanket of stars).

Here is one of Deke's images from the totality before any processing (still extremely cool):

The "before" shot of the eclipse from Alliance, Nebraska

And here is his ultimate interpretation after some minor color adjustment, detail and noise balancing, and a crop to better center the sun/moon.



If you're a member of Lynda.com/LinkedInLeanring, Deke's got an exclusive movie this week in which he shows you how he smoothed out the noisy universe in the background usingthe radial blur filter.

Deke's Techniques, because the universe needs a little less noise sometimes. Read more » 

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Deke's Techniques 388: Smooth Away Noise with the Mean Stack Mode

Smooth Away Noise with the Stack Mode

In this week's free Deke's Techniques movie, Deke applies the Mean Stack mode command to multiple frames from a video in order to create one single photograph with drastically reduced noise.

The method involves converting frames from a noisy video clip into layers in Photoshop, then lining up those similar-but-slightly-off-due-to-being-on-a-moving-boat images using Photoshop's Auto-Align Layers command. Next, Deke uses the Stack Mode's Mean command to choose the average value of each pixel from each of the frames. The result is this noisy single frame (representative of the noise present in each of Deke's fifteen contributing images)...

...becomes this delightfully smooth rendition:

Image stack set to Mean reduces the noise of the stacked layers.

And next week, Deke demonstrates how to dramatically enhance this scene to more emotionally recreate the tropical magic. Here's a preview (actually here is the real thing):

If you're curious about other ways to take advantage of image stacking in Photoshop, there are a couple of other Deke's Techniques you might enjoy. In one, Deke removed "people" (OK, four copies of me and four monkey heads---hey, it's Deke) from the Teatro Olimpico in Vincenza, Italy. In another, he uses image stacks to toy with the tourists on the Piazza San Marco in Venice, allowing you to experience this popular tourist attraction in ways never possible in real life.

If you're not a member of lynda.com, you can get a free 10-day trial to check out all the episodes by heading over to lynda.com/deke.

See you next week if I haven't run back to the magical islands! Read more » 

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Deke's Techniques 231: Fixing a Noisy High-ISO Photo with Adobe Camera Raw

Reducing Noise in a High ISO Photo

I have a vested interest-slash-concern in this week's free Deke's Techniques episode, in which he takes a photograph of yours truly---a hand-held shot at high ISO under government-supplied lighting---and attempts to redeem it with Adobe Camera Raw. My interest is that it's a flattering shot from a great day at Carlsbad Caverns; my concern is that the high noise is not only making my skin look blotchy, but horror-of-horrors, it's causing my jacket to look purple

But with some thoughtfully applied ACR adjustments, Deke effects this delightful transformation:

Working in ACR, Deke first uses the Temperature and Tint sliders, as well as controls in the HSL and Lens Correction tabs to (thank goodness) return my jacket to its proper neutral black. But the real work in this photo transformation happens in the Detail tab: Read more » 

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Deke’s Techniques 011: Masking Highlights and Shadows

Deke’s Techniques 011: Masking Highlights and Shadows

This week's 7-minute video shows you how to isolate the highlights and shadows from one image and blend them with those of another. It's quick, it's easy, it's effective. Read more » 

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Deke’s Techniques 009: Building a Synthetic Starfield (from Scratch!)

Deke’s Techniques 009: Building a Synthetic Starfield

This week, I and my beloved video publisher lynda.com have a special treat for you: I show you how to create a galaxy of stars, solar flare, and space gas from nothing more than a layer of black pixels. And you can customize it for print, for the web, whatever you want. In just 9 minutes and 1 extra-quick second, you can Big Bang in Photoshop. Read more » 

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