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By Christopher Smith
From time to time, the technology of digital cameras can introduce unwanted artifacts. One type of artifact that you can fix with Photoshop is an excessive amount of colour noise or colour blooming. You’ll most likely see this problem when shooting with a high ISO setting (typically over 400 ISO) or with a low-end digital camera (cell phone cameras). The added colour artifacting doesn’t represent the true colour of an image. I call this phenomenon “The Colour Gremlins”. Left alone to live in your digital file, they can play havoc whenever you try to use Curves or employ any other colour manipulation method.

When zoomed in beyond 100%, the Colour Gremlins become visible. Here’s how to fix this problem.

[1] Apply the Median filter to the overall image. Do this by going to...
Filter > Noise > Median...
Note: The three dots “...” at the end of the word Median in the menu pull down, indicates that you’ll be promp...

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Michael Reichmann is the founder of the Luminous Landscape. Michael passed away in May 2016. Since its inception in 1999 LuLa has become the world's largest site devoted to the art, craft, and technology of photography. Each month more than one million people from every country on the globe visit LuLa.
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