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swCHIP 1991 January
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swCHIP_95-1.bin
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wit4711
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pyramid
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burtreco.
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burtreco.bin
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1995-12-09
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18 lines
OPERATOR
burtRecon --- reconstruct original image from a Burt pyramid
DESCRIPTION
The burtRecon operator reconstructs an original image from the Burt pyramid
that was generated from it. This reconstruction should be exact, barring
things like overflow during computation. Given that a Burt pyramid is a
sequence of n images I(i), the process is to expand I(n), then add I(n-1).
The result is expanded and then I(n-2) is added, etc. 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. Care must be taken
to insure that the filter used is the same one that was used to generated
the pyramid, or reconstruction will not be exact.