24.2 Binary Coding
Assume that a spectral signature vector s specified by a column vectior where L is the total number of spectral bands. Each signature component sl in s represents a spectral value at the lth spectral band that is acquired by a particular wavelength ωl in a specific spectral range.
24.2.1 SPAM Binary Coding
Let μ be the mean of a spectral signature s and given by
Using (24.1) we can encode the signature vector s as a -dimensional binary code word, denoted by where is an L-dimensional binary code word and is an -dimensional binary code word, both of which are defined by
Now, for given two spectral signatures vectors and we can measure their similarity ...