:ͼ˲

ʽ:
ImageFilter(img,w)

img:Ϊbitmapͼ 
w:Ϊm*nе˲ģ,ҪmnΪ2

˵:ԭimgÿԪؽӦȨز,жڱ߽,ֱӲøƵԭ+

PS:Ҫʵͼƽͼ񻯵Ȳ,ֱӸӦģwִӦ

:
񻯵гõSobelģ
w = [ 1  2  1
      0  0  0
     -1 -2 -1 ]//ˮƽģ

w = [ 1  0  -1
      2  0  -2
      1  0  -1 ]//ֱģ
      
ԼһЩģ
w = [ 0  1  0
      1 -4  1
      0  1  0 ]
      
w = [ 1  1  1
      1 -8  1
      1  1  1 ]

w = [ 1  4  1
      4 -20 4
      1  4  1 ]

:

