Boots – shoes – and leggings
Patent
1991-03-11
1992-08-11
Nguyen, Long T.
Boots, shoes, and leggings
G06F 1531
Patent
active
051385678
ABSTRACT:
In a median filter, signals received at the input are fed to a cascade of delay elements whose number is equal to the degree N of the median filter. The signals at the outputs of the delay elements which preceded the signal received at the input are fed to N subtracters which form the differences between the signal at the input and the N preceding signals. The signs of the differences are stored in shift registers, and upon receipt of a new signal at the input, they are shifted by one place. From the signs of the differences, the selection unit determines the median as the signal for which N/2 differences have negative signs and N/2 differences have positive signs.
REFERENCES:
patent: 4928258 (1990-05-01), May
H0-ming Lin, et al., "Median Filters with Adaptive Length", IEEE Transactions on Circuits and Systems, vol. 35, No. 6, Jun. 1988, pp. 675-690.
Petros Maragos, et al., "Morphological Filters-Part I: Their Set-Theoretic Analysis and Relations to Linear Shift-Invariant Filters", IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. ASSP-35, No. 8, Aug. 1987, pp. 1153-1169.
Petros Maragos, et al., "Morphological Filters-Part II: Their Relations to Median, Order-Statistic, and Stack Filters", IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. ASSP-35, No. 8, Aug. 1987, pp. 1170-1183.
Azriel Rosenfeld, et al., Digital Picture Processing, Second Edition, vol. 1, Academic Press, Inc., pp. 261-265.
Helmut Schonfelder, Digital Filter in der Videotechnik, ISBN, 3-925786-02-3, 1988, pp. 125, 126,224-226.
Deutsche ITT Industries GmbH
Nguyen Long T.
Peterson Thomas L.
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