Ps menu ： Filter / vague / Surface blur
Filter/Blur/Surface Blur
This paper introduces the method of using surface blur filter to grind skin .
The basic idea is ： Use the surface blur filter to blur the skin （ Moulting ）, Using high contrast filter to restore skin texture （ texture ）.
explain ： The calculation intensity of surface fuzzy filter is high , Especially for large files, it takes a long time .
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General steps and instructions
1, Fix defects before blurring .
First, use stain repair brush tools to remove skin defects , Including broken hair , Obvious spots and lines, etc .
explain ： It is recommended to remove the defects on the new blank layer .
2, Stamp layer , And named it “ Moulting ”.
Shortcut key ：Ctrl/Cmd + Alt/Opt + Shift + E .
3, duplicate layer （ Shortcut key ：Ctrl/Cmd + J ）, Named “ texture ”. Yes “ texture ” Layer decolor （ Shortcut key ：Ctrl/Cmd + Shift + U）, Then hide the layer .
4, Select “ Moulting ” layer , Convert to smart objects , implement Ps menu ： Filter / vague / Surface blur .
Parameter description ：
-- radius Radius
Specifies the size of the blur sampling area .
-- threshold Threshold
It controls the difference between the color scale value of adjacent pixels and that of the center pixel .
Pixels whose color difference is less than the threshold will be blurred , Those above the threshold are not blurred . And USM The threshold in sharpening filter is opposite .
The higher the threshold , The more obvious the blur effect is .
General operation method of surface blur filter
（1） First, increase “ threshold ” To the maximum .
（2） Then lower it “ radius ”, Until you can see the basic outline .
（3） And then back down “ threshold ”, Until the edge of the main contour becomes clear and the skin is blurred .
5, display “ texture ” layer , And convert to intelligent objects , Change the layer mode to “ superposition ”. next , implement Ps menu ： Filter / other / high pass . Adjust radius value , Until the details show .
6, choice “ texture ” Layers and “ Moulting ” layer , Organize （ Shortcut key ：Ctrl/Cmd + G）, Named “ Moulting ”, Double click to enter layer style .
7, Use the “ Mixed color band ”, Make sure the sharpening range is in the middle , Please refer to the figure below .
8, Create a black mask on a layer group , Select the white brush tool to wipe out the area to be skinned .
9, According to the actual situation , Adjust the filter values of surface blur and high contrast retention again , Until you get the best results .
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