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JFS Distance Metric
d(I,Q) = w00 | Q[0,0] - I[0,0] | + å wij | Q’[i,j] - I’[i,j] |
ij
where
the w’s are weights,
Q[0,0]
and I[0,0] are scaling coefficients related
to
average image intensity,
Q’[i,j] and I’[i,j] are the truncated, quantized coefficients.