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

Source code¶

C++ source code

C++ header file