"Frequency Separation Brush?"

[pierre5018 (PIERRE LABRECHE)]

I suggested a feature which is closely related.
Does it suit the same purpose?

Advanced Sharpening: Noise Reduction, Speck Removal and Sharpening tool (locally and globally applicable)

I like Picture Window Pro’s “Advanced Sharpen” transformation. It would be great to find it in Photolab. Essentially, it consists in three stages, conveniently combined under one interface. Noise Reduction - User-defined blurring radius and spatial frequency range where the blurring is enabled. Blurring can apply selectively to all RGB components or to the color components only, not affecting luminance. Speck removal - User-defined speck size in pixels, user-defined difference threshold, sep…