Unsharp Mask Edges

Unsharp Mask Edges detects edges in the image. After that it applies Unsharp Mask to the edge-pixels with a small blur.

In addition, the user can specify the radius of a region with which each pixel will be compared. The greater the radius is, the larger the edge effects are.

To use the Unsharp Mask Edges filter:

Choose Filters > Sharpen > Unsharp Mask Edges