From: Hard versus fuzzy c-means clustering for color quantization
 |  | Hats | Motocross | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 |  |  | HCM | FCM |  | HCM | FCM | ||||||
C | Â | Init | Â | 1.25 | 1.50 | 1.75 | 2.00 | Init | Â | 1.25 | 1.50 | 1.75 | 2.00 |
32 | MC | 30 | 16 | 16 | 16 | 16 | 15 | 26 | 19 | 19 | 19 | 18 | 18 |
 | OCT | 19 | 15 | 15 | 15 | 15 | 15 | 21 | 17 | 18 | 18 | 18 | 18 |
 | WAN | 26 | 15 | 15 | 15 | 15 | 15 | 24 | 18 | 18 | 18 | 18 | 18 |
 | WU | 18 | 15 | 15 | 15 | 15 | 15 | 21 | 18 | 18 | 17 | 17 | 18 |
64 | MC | 18 | 12 | 12 | 11 | 11 | 11 | 20 | 15 | 15 | 14 | 14 | 14 |
 | OCT | 13 | 10 | 10 | 10 | 10 | 10 | 15 | 13 | 13 | 13 | 13 | 13 |
 | WAN | 18 | 11 | 11 | 10 | 10 | 11 | 19 | 14 | 14 | 13 | 13 | 14 |
 | WU | 12 | 10 | 10 | 10 | 10 | 10 | 15 | 13 | 13 | 13 | 13 | 13 |
128 | MC | 13 | 9 | 8 | 8 | 8 | 8 | 16 | 12 | 11 | 11 | 11 | 11 |
 | OCT | 9 | 7 | 7 | 7 | 7 | 7 | 12 | 10 | 10 | 10 | 10 | 10 |
 | WAN | 11 | 8 | 7 | 7 | 7 | 7 | 15 | 10 | 10 | 10 | 10 | 11 |
 | WU | 9 | 7 | 7 | 7 | 7 | 7 | 12 | 10 | 10 | 10 | 10 | 10 |
256 | MC | 10 | 7 | 6 | 6 | 6 | 6 | 13 | 9 | 9 | 9 | 8 | 9 |
 | OCT | 6 | 5 | 5 | 5 | 5 | 5 | 9 | 8 | 8 | 8 | 8 | 8 |
 | WAN | 9 | 5 | 5 | 5 | 5 | 5 | 12 | 8 | 8 | 8 | 8 | 8 |
 | WU | 6 | 5 | 5 | 5 | 5 | 5 | 9 | 8 | 8 | 8 | 8 | 8 |
 |  | Flowers and Sill | Cover Girl | ||||||||||
 |  |  | HCM | FCM |  | HCM | FCM | ||||||
C | Â | Init | Â | 1.25 | 1.50 | 1.75 | 2.00 | Init | Â | 1.25 | 1.50 | 1.75 | 2.00 |
32 | MC | 20 | 14 | 14 | 14 | 13 | 13 | 22 | 16 | 15 | 14 | 14 | 14 |
 | OCT | 15 | 12 | 12 | 12 | 12 | 12 | 17 | 14 | 14 | 14 | 13 | 13 |
 | WAN | 17 | 12 | 12 | 12 | 12 | 12 | 18 | 14 | 14 | 14 | 14 | 14 |
 | WU | 14 | 12 | 12 | 12 | 12 | 12 | 16 | 14 | 14 | 14 | 14 | 14 |
64 | MC | 14 | 11 | 10 | 10 | 10 | 10 | 16 | 11 | 11 | 11 | 11 | 10 |
 | OCT | 11 | 9 | 9 | 9 | 9 | 9 | 12 | 10 | 10 | 10 | 10 | 10 |
 | WAN | 12 | 9 | 9 | 9 | 9 | 9 | 15 | 11 | 11 | 10 | 10 | 11 |
 | WU | 10 | 9 | 9 | 9 | 9 | 9 | 12 | 10 | 10 | 10 | 10 | 10 |
128 | MC | 12 | 8 | 8 | 8 | 7 | 7 | 13 | 9 | 8 | 8 | 8 | 8 |
 | OCT | 8 | 7 | 7 | 7 | 7 | 7 | 9 | 8 | 7 | 7 | 7 | 8 |
 | WAN | 9 | 7 | 7 | 7 | 7 | 7 | 12 | 8 | 8 | 8 | 8 | 8 |
 | WU | 8 | 7 | 7 | 7 | 7 | 7 | 9 | 8 | 8 | 8 | 8 | 8 |
256 | MC | 9 | 6 | 6 | 6 | 6 | 6 | 11 | 7 | 7 | 6 | 6 | 6 |
 | OCT | 6 | 5 | 5 | 5 | 5 | 5 | 7 | 6 | 6 | 6 | 6 | 6 |
 | WAN | 8 | 5 | 5 | 5 | 5 | 5 | 10 | 6 | 6 | 6 | 6 | 6 |
 | WU | 6 | 5 | 5 | 5 | 5 | 5 | 7 | 6 | 6 | 6 | 6 | 6 |
 |  | Parrots | Poolballs | ||||||||||
 |  |  | HCM | FCM |  | HCM | FCM | ||||||
C | Â | Init | Â | 1.25 | 1.50 | 1.75 | 2.00 | Init | Â | 1.25 | 1.50 | 1.75 | 2.00 |
32 | MC | 28 | 21 | 21 | 20 | 21 | 21 | 12 | 9 | 9 | 9 | 7 | 7 |
 | OCT | 24 | 20 | 20 | 20 | 20 | 20 | 8 | 6 | 6 | 6 | 6 | 6 |
 | WAN | 25 | 21 | 20 | 20 | 20 | 20 | 11 | 6 | 6 | 6 | 6 | 6 |
 | WU | 23 | 20 | 20 | 20 | 20 | 20 | 7 | 7 | 6 | 6 | 6 | 6 |
64 | MC | 22 | 15 | 15 | 15 | 15 | 15 | 9 | 6 | 6 | 6 | 5 | 5 |
 | OCT | 18 | 15 | 15 | 15 | 15 | 15 | 5 | 4 | 4 | 3 | 3 | 4 |
 | WAN | 19 | 15 | 15 | 15 | 15 | 15 | 9 | 4 | 4 | 4 | 4 | 4 |
 | WU | 17 | 15 | 15 | 15 | 15 | 15 | 5 | 4 | 4 | 4 | 4 | 4 |
128 | MC | 16 | 12 | 12 | 12 | 12 | 12 | 7 | 5 | 5 | 5 | 4 | 3 |
 | OCT | 14 | 11 | 11 | 11 | 11 | 11 | 3 | 2 | 2 | 2 | 2 | 2 |
 | WAN | 15 | 11 | 11 | 11 | 11 | 12 | 9 | 3 | 3 | 3 | 3 | 3 |
 | WU | 13 | 11 | 11 | 11 | 11 | 11 | 4 | 3 | 3 | 3 | 2 | 2 |
256 | MC | 13 | 9 | 9 | 9 | 9 | 9 | 7 | 4 | 3 | 3 | 3 | 2 |
 | OCT | 10 | 9 | 8 | 8 | 9 | 9 | 2 | 2 | 2 | 2 | 2 | 2 |
 | WAN | 12 | 9 | 9 | 9 | 9 | 9 | 8 | 2 | 2 | 2 | 2 | 2 |
 | WU | 10 | 9 | 8 | 8 | 9 | 9 | 4 | 2 | 2 | 2 | 2 | 2 |