be considered to be the autocorrelations of one-dimensional wide-sense
Markov-/c
r
and Markov-/c
c
sequences^ respectively.
As was the case in (181), since LR
row
] and
[JR
co1
]
are positive definite,
unique invertible lower triangular [G
r
] and [GJ exist such that
[G
r
][K
row
][G
r
]'
= «[/]
and
[Gc][«
col
][G
c
]'
= /?[/] (183)
where the constants α and β are chosen such that the principal diagonals of
both [G
r
] and [G
c
] are unity.
If f is the N
2
-element vector generated by column scanning the image
matrix [f], and [R
ff
] its autocorrelation matrix, as defined in (50), then it
may be shown by substitution that (see Section 2.
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