Frequency Separation
Watch the Frequency Separation video and fill out your "How do I...?" worksheet.
FREQUENCY SEPARATION RETOUCHING
HOW DO I…?
How do I…
…create a high frequency layer and a low frequency layer?
…run the high pass filter on the high frequency layer?
…decide where to set my radius on the high pass filter?
…change the high frequency layer blending mode to “linear light?”
At what opacity should I set my high frequency layer?
How do I …
…run a Gaussian Blur on the low frequency layer?
…know what to set the pixel radius to in my blur?
Which type of tools should I use for retouching on the low frequency layer? Which hardness and opacity?
Which type of tools should I use for retouching on the high frequency layer? Which hardness and opacity?
Basic Written Instructions to go with the video:
Create two duplicate layers.
Name the top layer "high frequency."
Name the bottom layer "low frequency."
Select high frequency layer and apply the high pass filter.
Filter>Other>High Pass
Slowly move the radius number from zero up. You want to see some changes in texture, but not too much. You'll start to see some major changes occur in the texture and then you need to pull the radius back down. Click Okay.
Change the high frequency layer's blending mode to "Linear light."
Change the opacity of the layer to exactly 50%.
Now turn off the visibility of the high frequency layer.
Apply a Gaussian Blur to the low frequency layer with the same pixel radius as chosen before for the high pass filter.
Turn high frequency visibility back on and you are ready for retouching.
On low frequency layer, you can use the healing brush on soft and fluffy with the sampling set to "current layer."
On high frequency layer you can use the same tools with a higher hardness and higher opacity.