Boots – shoes – and leggings
Patent
1985-04-30
1987-04-14
Gruber, Felix D.
Boots, shoes, and leggings
364724, 307351, H03H 1700, H03K 5153
Patent
active
046583688
ABSTRACT:
The position of a peak in a digital signal is determined by a circuit consisting of a finite impulse response filter constructed in accordance with either the expression (1+z.sup.-1)(1+z.sup.-2) (1-z.sup.-5) or the simplified expression (1+z.sup.-1) (1-z.sup.-3), where z is the z transform function and the index indicates the number of clock intervals in each delay. The practical realization of the filter for applying these expressions to the input signal involves the use of three (for the first expression) or two (for the second expression) delay circuits in series. The output of the filter is a differentiated signal, the zero crossing point of which represents the desired peak position. This crossing point is detected in an interpolation circuit which linearly interpolates the location of such point to a fraction of a clock interval or pixel.
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Jacobus et al., Two New Edge Detectors, "IEEE Transations on Pattern Analysis and Machine Intelligence", vol. PAMI-3, No. 5, Sep. 1981, pp. 581-592.
Lotto et al., Automatic Peak-Locating Techniques for .gamma.-Ray Spectra, "Nuclear Measurements and Methods", 143(1977), pp. 617-620.
Rabiner et al., Theory and Application of Digital Signal Processing, Prentice-Hall, Inc., 1975, pp. 28-50.
Tai et al., "A Real Time Correlator with a Peak Detector", Journal of Electronic Physics, vol. 8, No. 3, pp. 206-208, Mar. 1975.
Canadian Patents and Development Limited-Societe Canadienne Des
Gruber Felix D.
Juffernbruch Daniel W.
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