Convolution Filtering

2

2

2

1

9

4

5

2

4

-2

-1

0

-1

0

1

2

0

1

Image I[i,j]

Kernel K[1,1]

I'[i,j] = ? I[i+r,j+s]? K[1+r,1+s]

r, s = -1, 1

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