Photo editing and management app Darkroom has been updated with a new Clarity slider that I’ve been testing on the iPhone and iPad for a couple of weeks now.
The new slider in the app’s editing panel is deceptively simple. Move the slider to the right to make the details of an image pop or to the left to smooth out the details. If you look carefully, though, you’ll notice that the increase in contrast isn’t uniform across a photo. You can turn the Clarity of a portrait down to smooth a person’s skin, for instance, without affecting their hair or eyes.
As Jasper Hauser explains on the Darkroom blog, the Clarity slider is logarithmic, meaning that the effect intensifies more quickly as you approach the endpoints. Picking a point in the middle of the slider’s range produces a subtler effect.
The effect works well with landscapes like the photo of skyscrapers along the Chicago River at the beginning of this story. You can see that increasing Clarity brings out the details in the windows of each building, and turning Clarity down softens areas like the water.
As Hauser explains, Clarity works by building a detail map of an image and then adjusting the contrast of its regions using an algorithm called a Fast Local Laplacian Filter. There’s a lot of math happening under the hood that Hauser links to if you’re interested in learning more behind what the Darkroom team has managed to incorporate into a simple slider interaction that’s yet another excellent addition to this Apple Design Award-winning app. To learn more about Darkroom’s features, be sure to check out our past coverage and interview on AppStories with Darkroom co-founder Majd Taby.
Darkroom’s latest update is available on the App Store.