"Sobel (3x3x3 -- 3sets -- x -45*2)	max_abs"
3 3 1
3
-1	0	1	-1 
	0	2	-2
	0	1	-1  

0	0	2	-2
	0	4	-4
	0	2	-2

1	0	1	-1 
	0	2	-2
	0	1	-1  
3
-1	0	 0	 1
	0	 2	-1
	1	-1	-2

0	0	 0	 2
	0	 4	-2
	2	-4	-2

1	0	 0	 1
	0	 2	-1
	1	-1	-2
3
-1	0	0	0
	1	2	1 
	-1	-2	-1  

0	0	0	0
	2	4	2
	-2	-4	-2

1	 0	 0	 0
	 1	 2 	 1 
	-1	-2	-1  
