unsharp[=l|cWxH:amount[:l|cWxH:amount]]　Fraternity7

unsharp[=l|cWxH:amount[:l|cWxH:amount]]
    unsharp mask / gaussian blur

   l
     Apply effect on luma component.

   c
     Apply effect on chroma components.

   <width>x<height>
     width and height of the matrix, odd sized in both direc-
     tions (min = 3x3, max = 13x11 or 11x13, usually  some-
     thing between 3x3 and 7x7)

   amount
     Relative amount of sharpness/blur to add to the image (a
     sane range should be -1.5-1.5).
    <0: blur
    >0: sharpen