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swCHIP 1991 January
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swCHIP_95-1.bin
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pyramid
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burtstep.
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burtstep.bin
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1995-12-09
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OPERATOR
burtStep --- generate a new level in a Burt pyramid
DESCRIPTION
The burtStep operator performs one iteration in the generation of a Burt
pyramid (see burt ). The image output on the top port is equivalent to
applying the reduce operator to the input image. The image output on the
middle port is the difference between the input image and the expanded
version of the reduced version of that image. The bottom output port is a
flag which is set to 1 if this last iteration is the final step in a FSD
pyramid generation. The flag is 0 otherwise. The final iteration occurs when
the output image size is less than minimum size in at least one dimension.
The filter parameter specifies the type of gaussian filter used during image
reduction and expansion. The filters correspond to those provide by the gauss
operator within the filter library. The minsize parameter denotes the minimum
size of image that will be accepted as input to the operator.