PeakDetection

streaming mode | Standard category

Inputs

  • array (vector_real) - the input array

Outputs

  • positions (vector_real) - the positions of the peaks
  • amplitudes (vector_real) - the amplitudes of the peaks

Parameters

  • interpolate (bool ∈ {true, false}, default = true) :
    boolean flag to enable interpolation
  • maxPeaks (integer ∈ [1, ∞), default = 100) :
    the maximum number of returned peaks
  • maxPosition (real ∈ (0, ∞), default = 1) :
    the maximum value of the range to evaluate
  • minPeakDistance (real ∈ [0, ∞), default = 0) :
    minimum distance between consecutive peaks (0 to bypass this feature)
  • minPosition (real ∈ [0, ∞), default = 0) :
    the minimum value of the range to evaluate
  • orderBy (string ∈ {position, amplitude}, default = position) :
    the ordering type of the output peaks (ascending by position or descending by value)
  • range (real ∈ (0, ∞), default = 1) :
    the input range
  • threshold (real ∈ (-∞, ∞), default = -1e+06) :
    peaks below this given threshold are not output

Description

This algorithm detects local maxima (peaks) in an array. The algorithm finds positive slopes and detects a peak when the slope changes sign and the peak is above the threshold. It optionally interpolates using parabolic curve fitting. When two consecutive peaks are closer than the minPeakDistance parameter, the smallest one is discarded. A value of 0 bypasses this feature.

Exceptions are thrown if parameter "minPosition" is greater than parameter "maxPosition", also if the size of the input array is less than 2 elements.

References:
[1] Peak Detection, http://ccrma.stanford.edu/~jos/parshl/Peak_Detection_Steps_3.html

See also

PeakDetection (standard)

Streaming algorithms

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