24.2 Binary Coding

Assume that a spectral signature vector s specified by a column vectior img 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

(24.1) equation

Using (24.1) we can encode the signature vector s as a img-dimensional binary code word, denoted by img where img is an L-dimensional binary code word and img is an img-dimensional binary code word, both of which are defined by

(24.2) equation

and

(24.3)

Now, for given two spectral signatures vectors and we can measure their similarity ...

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