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The Clarifier (Targeted Local Contrast Enhancement)

Take the hazy look out of a picture using an ultra-high radius, low amount of unsharp mask. Because of the extremely large unsharp mask radius, it doesn't add any sharpening to the picture. I regularly use two settings, one for light haze removal, the other for more extreme haze. This is a great haze removing & detail enhancing procedure (examples shown below). The Drag racer pictured below is enhanced with the haze removal. A parts geek could spend days with an engine in this car. Of course only a professional mechanic should be working on such a vehicle.

Original Picture
(Above) Original: A little bit hazy.

Clarified (Standard Setting 20-30-4)
(Above) Light haze removal using Unsharp Mask: Amount 20%, Radius 30, Threshold 4

Clarifier (Stronger Setting 20-60-4)
(Above) Stronger haze removal, using Amount 20%, Radius 60, Threshold 4

Links to other web articles covering local contrast enhancement using Photoshop Unsharp Mask: