You can fine-tune grain removal by changing the spatial degrain parameters in the Degrain Settings panel.
The Degrain Settings menu is made up of the following elements.
- Red slider
- Sets the gain for red channel colour values.
- Green slider
- Sets the gain for green channel colour values.
- Blue slider
- Sets the gain for blue channel colour values. For film scans, the grain is often greater in this channel.
- Link button
- Click to change gain values proportionally for all three colour channels.
- Grain Size slider
- Sets a value in pixels that is proportional to the size of the grain. The default value is 3, but may be higher for 4K images.
- Smoothing Radius slider
- Sets the blur radius. For smoother results, a higher value will add more pixels to the blur, but increase processing time.
- Detail slider
- Sets the amount of detail to preserve when the Smoothing Radius is set to a high value. It is recommended you enter 0.05 to 0.15 as an initial value.
- Opacity slider
- Sets the level of opacity between the source image and the output with the applied grain filter.