Frequency separation

Frequency separation allows you to retouch texture and tone/color independently for powerful portrait retouching.

Before
After
Before and after retouch on high and low frequency layers.

Frequency separation

Although the term frequency separation is initially intimidating, the concept is straightforward. By automatically separating your image color/tone and texture into separate low and high frequency layers, respectively, you'll be able to retouch color/tone and texture independently.

To apply frequency separation:
  1. From the Filters menu, select Frequency Separation.
  2. Drag on either high or low pass preview panes, to set the Radius (or use the slider in the dialog); this sets the balance between texture and tone. Set the value so the image's Low Frequency preview blends image color and tone but without losing major features within it.
  3. (Optional) From the dialog, check Feature Protection Tolerance and set a tolerance value on the slider. This preserves major facial features when applying subsequent brush strokes.
To retouch color or tone:
  1. From the Layers panel, select the Low Frequency layer.
  2. Apply retouch tools to the layer as appropriate.
To retouch textures:
  1. From the Layers panel, select the High Frequency layer.
  2. Apply retouch tools to the layer as appropriate.

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