<threshold map="c7x7b" alias="c7x7">
<description>Circles 7x7 (black)</description>
<levels width="7" height="7" divisor="50">
- 2 7 17 26 15 6 1
- 8 16 33 39 32 13 5
- 18 34 44 48 43 31 14
- 27 40 45 49 47 38 25
- 20 35 41 46 42 30 24
- 9 19 36 37 29 22 12
- 3 10 21 28 23 11 4
+ 3 9 18 28 17 8 2
+ 10 24 33 39 32 23 7
+ 19 34 44 48 43 31 16
+ 25 40 45 49 47 38 27
+ 20 35 41 46 42 29 15
+ 11 21 36 37 28 22 6
+ 4 12 13 26 14 5 1
</levels>
</threshold>
<threshold map="c7x7w">
<description>Circles 7x7 (white)</description>
<levels width="7" height="7" divisor="50">
- 49 42 32 18 19 33 48
- 41 31 17 10 11 20 34
- 40 30 9 2 3 12 21
- 39 29 8 1 4 5 22
- 43 28 16 7 6 13 23
- 44 38 27 15 14 24 35
- 46 45 37 26 25 36 47
+ 47 41 32 22 33 42 48
+ 40 26 17 11 18 27 43
+ 31 16 6 2 7 19 34
+ 25 10 5 1 3 12 23
+ 30 15 9 4 8 20 35
+ 39 29 14 13 21 28 44
+ 46 38 37 24 36 45 49
</levels>
</threshold>