When using ORB to compute key points and descriptors, descriptors are represented as arrays of length 32, for example:
[118 35 199 228 23 66 194 64 233 137 187 74 75 120 85 130 248 229 93 241 13 227 128 200 185 220 143 147 237 43 123 2]
What do these numbers represent?