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 | 618 | 159 | 169 | 163 | 175 | 185 | 427 | 217 | 209 | 229 | 236 | 253 |
 | OCT | 293 | 185 | 184 | 187 | 214 | 242 | 301 | 197 | 203 | 249 | 277 | 280 |
 | WAN | 624 | 162 | 160 | 165 | 172 | 201 | 446 | 194 | 193 | 220 | 235 | 291 |
 | WU | 213 | 157 | 157 | 156 | 163 | 172 | 268 | 191 | 191 | 194 | 198 | 208 |
64 | MC | 192 | 91 | 87 | 86 | 87 | 99 | 232 | 125 | 123 | 119 | 125 | 134 |
 | OCT | 132 | 79 | 79 | 78 | 87 | 94 | 159 | 111 | 112 | 122 | 129 | 142 |
 | WAN | 311 | 89 | 83 | 84 | 100 | 110 | 292 | 112 | 111 | 117 | 122 | 141 |
 | WU | 103 | 72 | 75 | 75 | 79 | 85 | 147 | 109 | 109 | 111 | 121 | 126 |
128 | MC | 111 | 47 | 45 | 45 | 50 | 52 | 154 | 76 | 74 | 72 | 75 | 86 |
 | OCT | 65 | 43 | 43 | 43 | 48 | 52 | 96 | 65 | 65 | 69 | 76 | 91 |
 | WAN | 106 | 44 | 42 | 44 | 48 | 51 | 169 | 66 | 66 | 68 | 72 | 85 |
 | WU | 52 | 38 | 40 | 40 | 42 | 46 | 87 | 63 | 63 | 65 | 70 | 84 |
256 | MC | 63 | 29 | 27 | 26 | 28 | 31 | 100 | 49 | 45 | 45 | 48 | 57 |
 | OCT | 34 | 22 | 24 | 25 | 28 | 33 | 54 | 39 | 39 | 42 | 48 | 55 |
 | WAN | 53 | 21 | 23 | 24 | 26 | 30 | 92 | 39 | 39 | 40 | 44 | 53 |
 | WU | 30 | 21 | 23 | 23 | 25 | 28 | 51 | 38 | 38 | 39 | 43 | 50 |
 |  | 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 | 257 | 117 | 117 | 114 | 112 | 120 | 269 | 142 | 132 | 127 | 130 | 135 |
 | OCT | 155 | 102 | 102 | 102 | 109 | 120 | 182 | 127 | 127 | 128 | 131 | 137 |
 | WAN | 198 | 102 | 100 | 101 | 107 | 114 | 230 | 126 | 127 | 129 | 133 | 137 |
 | WU | 134 | 101 | 100 | 101 | 103 | 108 | 162 | 126 | 125 | 126 | 129 | 133 |
64 | MC | 113 | 66 | 64 | 64 | 65 | 70 | 145 | 79 | 78 | 76 | 80 | 85 |
 | OCT | 88 | 58 | 57 | 58 | 66 | 75 | 105 | 72 | 72 | 75 | 78 | 87 |
 | WAN | 98 | 56 | 55 | 56 | 59 | 64 | 157 | 75 | 75 | 77 | 83 | 88 |
 | WU | 71 | 53 | 56 | 57 | 59 | 61 | 93 | 71 | 72 | 73 | 76 | 82 |
128 | MC | 84 | 42 | 39 | 38 | 39 | 43 | 104 | 52 | 45 | 44 | 47 | 56 |
 | OCT | 47 | 33 | 33 | 34 | 37 | 42 | 62 | 42 | 42 | 44 | 47 | 52 |
 | WAN | 57 | 29 | 32 | 33 | 35 | 39 | 102 | 44 | 43 | 45 | 50 | 57 |
 | WU | 40 | 30 | 32 | 32 | 34 | 38 | 55 | 41 | 40 | 41 | 44 | 49 |
256 | MC | 48 | 23 | 24 | 23 | 24 | 27 | 68 | 32 | 29 | 28 | 29 | 34 |
 | OCT | 26 | 19 | 21 | 21 | 24 | 27 | 36 | 25 | 25 | 25 | 29 | 33 |
 | WAN | 37 | 18 | 20 | 20 | 22 | 25 | 63 | 26 | 25 | 26 | 28 | 32 |
 | WU | 26 | 18 | 20 | 20 | 22 | 24 | 33 | 24 | 24 | 24 | 26 | 31 |
 |  | 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 | 418 | 240 | 240 | 241 | 274 | 285 | 136 | 74 | 72 | 71 | 66 | 61 |
 | OCT | 342 | 247 | 246 | 246 | 255 | 265 | 130 | 74 | 67 | 75 | 85 | 88 |
 | WAN | 376 | 246 | 239 | 246 | 254 | 263 | 112 | 49 | 49 | 50 | 52 | 54 |
 | WU | 299 | 234 | 234 | 237 | 244 | 256 | 68 | 50 | 50 | 50 | 50 | 54 |
64 | MC | 274 | 137 | 137 | 138 | 140 | 157 | 64 | 39 | 39 | 39 | 28 | 30 |
 | OCT | 191 | 133 | 132 | 135 | 140 | 155 | 48 | 29 | 27 | 28 | 29 | 34 |
 | WAN | 233 | 131 | 131 | 132 | 141 | 164 | 59 | 22 | 22 | 22 | 22 | 24 |
 | WU | 167 | 130 | 130 | 131 | 135 | 155 | 31 | 22 | 21 | 21 | 22 | 23 |
128 | MC | 147 | 82 | 80 | 82 | 86 | 95 | 38 | 22 | 21 | 19 | 15 | 15 |
 | OCT | 111 | 79 | 78 | 79 | 85 | 97 | 20 | 12 | 12 | 12 | 13 | 16 |
 | WAN | 153 | 78 | 77 | 80 | 88 | 97 | 45 | 12 | 11 | 11 | 11 | 12 |
 | WU | 95 | 77 | 77 | 78 | 83 | 91 | 17 | 11 | 10 | 10 | 11 | 11 |
256 | MC | 96 | 50 | 49 | 49 | 53 | 62 | 27 | 13 | 10 | 9 | 8 | 8 |
 | OCT | 64 | 48 | 47 | 50 | 54 | 61 | 9 | 6 | 5 | 6 | 6 | 7 |
 | WAN | 92 | 44 | 47 | 49 | 55 | 61 | 38 | 6 | 6 | 5 | 6 | 6 |
 | WU | 58 | 46 | 46 | 48 | 52 | 59 | 11 | 6 | 5 | 5 | 6 | 6 |