Show-no-tell Dehazing How-To
Channel: Nevin Williams
Date: 28/04/2015

A show-no-tell video on how to correct for haze in a photo.

In this case, I start with a reasonably decent photo, and make a crop of the hazy mountain-top to illustrate how to use the fairly ubiquitous 'Levels' adjustments to narrow each individual colour channel's gamut so as to only encompass the range of their respective signals.

While this demo is on a Mac in the new Photos.app, those same Levels adjustments are available on many other image editors, including Photoshop, Aperture, Pixelmator, and others.

Then, at the end, I paste the successful adjustments I made to the crop back onto the uncropped original just for contrast... Areas of the original that had similar amounts of haze look OK, but as the haze becomes less pronounced the colours become more distorted.
Music is Beethoven's Sonata in C, performed solely by my Yamaha Clavinova.
Photo taken with a Nikon D3200
AF-S DX VR Nikkor 55-300mm 4.5-5.6G ED
ISO 100, 300mm, ƒ/6.3, 1/640