Use a non-destructive Band-pass Mask to mask based on a configurable frequency band. Band-pass masking lets you fine-tune image edges when applying sharpening filters such as High Pass or Unsharp Mask. Alternatively, you can apply blur artistic effects to image edges based on frequency.
Live Gaussian Blur filter without (Before) and with (After) a live band-pass mask.
Settings
The following settings can be adjusted:
Low Band—sets the lower limit of the frequency band.
High Band—sets the higher limit of the frequency band.
Intensity Map graph—the graph can be manipulated to precisely target the shadows, midtones and highlights affected by the band-pass mask. The left of graph represents shadows, middle is midtones and right is highlights; the lower the curve the greater the amount of masking.
Invert output—reverses the values of the mask.
Preview—allows you to display the selected hue on grayscale values (where white is the selected range and black is unselected).
Linear—when checked, the graduation between nodes is linear (i.e., nodes on the graph are connected using straight lines). If this option is off, nodes are connected using smooth curves.
Delete—deletes adjustments made to the live mask.
Opacity—alters the opacity of the mask.
Blur—controls the level of blurring at the edges of masked areas.
