size,colors,gray_stddev,status
16,169,0.104705,ok
20,229,0.0961543,ok
24,300,0.0875631,ok
29,396,0.0974807,ok
32,446,0.0871776,ok
40,627,0.122803,ok
48,792,0.126094,ok
64,1198,0.142225,ok
80,1509,0.155485,ok
128,2577,0.171217,ok
256,4464,0.185023,ok