Frequency Separation Action For Photoshop

a frequency separation action breaks your image into 2 layers. These layers are:

1. Skin details such as pores, lines, acne, scars and stray hairs. These are typically called the high frequencies and in action are known as the high-frequency layer.

2. Colour, tones and skin transitions from light to dark are on the second layer and typically called the low frequency or colour/ tones layer. 

By separating the image in this way you can remove blemishes and blend skin colour without losing overall skin texture. If done well it stops the subject from looking plastic and too heavily edited.