This is one of over 4720 effects generated by Filter Forge, a Photoshop plugin that allows you to create your own filters.
To open this filter, you must have Filter Forge 2.0 or higher installed on your computer. If you don't have it installed yet, click here to download Filter Forge
This sharpen method takes 4 separate highpass filters, each with different degrees of the filter. These are then combined via multiple maximum and minimum nodes, ultimately both resulting in two passes one good for highlight emphasis, one good for shadow emphasis. You can balance between the two through the dark/bright slider to get your desired look. Note that this can also achieve sketch-like painterly effects when the contrast is cranked high enough.
sharpen, extreme, contrast, detail, painterly, effect