Weighted average filtering
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
90
0
0
0
0
0
0
0
0
0
0
0
0
0
0
90
90
90
90
90
0
0
0
0
0
90
90
90
0
90
0
0
0
0
0
90
90
90
90
90
0
0
0
0
0
90
90
90
90
90
0
0
0
0
0
90
90
90
90
90
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
Replace each pixel with a
weighted
average of the pixels in the k
´
k box
•
3
´
3 case:
Show filter demo