filter> sharpen> unsharpen mask
一下是我给自己准备的notes:
1)Amount: 10% (to 20%) Radius: 30 (to 60) Threshold: 0 (or 1)
2) If want sharp
amount 125%, radius 1.5, threshold 1
3)我用过 125, 9, 1or 125, 5, 0 也很喜欢那种效果
Low radius (like 1.5) unsharp mask makes fine detail stand out.High radius (like 10 to 200) unsharp mask has a very different effect, it adds contrast to your photo. It is similar in appearance to what you get if you use Levels to narrow the dynamic range of the photo, but without the problem Levels has of turning your highlights into pure white and your shadows into pure black.