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We
usually work with digital (discrete) images:
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w |
Sample
the 2D space on a regular grid
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Quantize
each sample (round to nearest
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integer)
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If our
samples are D apart, we can write this as:
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f[i
,j] = Quantize{ f(i D, j D) }
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The
image can now be represented as a matrix of
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integer
values
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