Photoshop Plugins Photoshop Filters Color Correction

Smooth Area Detector Online Manual

Quick Start

Install the suggested action(s) into Photoshop and simply run it! This action can be applied to Smart Objects.

If you wish to manually tweak the filter settings during these actions, make sure that the boxes beside the filters are checked as in the picture below.

check the checkboxes!

  1. Adjust low threshold until smooth areas disappear. Detail areas can be recovered later.
  2. Adjust high threshold to control the rolloff/transition between smooth areas and detail areas.
  3. Click ok and edit the resulting matte with the brush (B) and quick selection (W) tools in Photoshop.

Advanced Controls

The Smooth Area Detector filter will perform an instance of Boundary Noise Reduction v2.2.0 before detecting smooth areas. The overall noise level and highlights noise level settings work exactly as in Boundary Noise Reduction (see manual).

You can effectively disable the noise reduction by setting noise level to 0.


  • Smooth Area Detector does not always pull a clean matte. You should manually tweak the GUI settings while running the suggested action.

    Use the Quick Selection Tool (W) on areas that you visually identify to be detail areas. Hit delete or use cut (command-X) to clear these areas. Make sure that your background color is set to black.

    You can also option-click onto the layer mask to view only the matte. Outside that mode, you can select the layer mask and edit the mask while viewing the final results instead of the matte.

  • For extremely low ISO photos, you may want to apply no noise reduction at all for the detail areas.

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