3x3 kernel for sharpening thumbs.

[Sullivan]

I'm currently using this one which is like an unsharp filter.

0, -1, 0,
-1, 7, -1,
0, -1, 0

But it's not getting the results I want, the output is usually too sharp for the size of the thumb.
Can anyone recommend a 3x3 kernel for sharpening? The result of a standard sharpen filter is usually too sharp aswell.

[daveknell]

Drop the magnitude of the -1s (e.g. to -0.8, then -0.6, -0.4..) until you get the results you want. I'd guess that whatever tool you're using normalises the filter for you: the one you've specified below has a gain of 3..

--Dave