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swCHIP 1991 January
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swCHIP_95-1.bin
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demo
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wit4711
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lib
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pyramid
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fsd.
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fsd.bin
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1995-12-09
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998b
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25 lines
OPERATOR
fsd --- generate a pyramid using FSD method
DESCRIPTION
The fsd operator generates two image sequences G(i) and L(i). The sequence
G(i) that is output on the top port is a Gaussian pyramid and is identical
to that which would be generated by the gaussPyramid operator. The sequence
L(i) is a Laplacian pyramid and is output on the bottom port. Each image,
L(i) is a difference between image G(i) and the filtered version of G(i).
Notationally,
G[1] = input image
G[i] = reduce(G[i-1]) for i > 1.
L[i] = G[i] - gauss(G[i])
The filter parameter selects the type of gaussian filter to be applied.
Currently, the user cannot define his own filters. The effect of each filter
is described in the WIT filter library during the discussion of the gauss
operator. The minsize parameter defines the minimum size that an image G(i)
can be before a reduce operation will not be performed and pyramid generation
will terminate.