Simac::CircularPeakPicking Class Reference

This processing takes a vector of scalars magnitudes and returns a list of peaks found considering that the first and last bins are neighbors. More...

#include <CircularPeakPicking.hxx>

List of all members.

Public Types
typedef std::vector< std::pair < double, double > >	PeakList
Public Member Functions
	CircularPeakPicking (unsigned chromagramSize, double binSize=1.0, double offset=0.0)
std::pair< double, double >	interpolate (double y0, double y1, double y2)
	Find the maximum of an interpolated quadratic polynomial function giving the samples at three equidistant points at x=0, x=1 and x=2.
void	doIt (const std::vector< double > &chromagram)
const PeakList &	output () const

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Detailed Description

This processing takes a vector of scalars magnitudes and returns a list of peaks found considering that the first and last bins are neighbors.

Peaks are detected when there is a bin that is greater that neighbor at both sides. Then peak position and value are interpolated using a quadratic function that passes also by the two neighbors bins.

The first bin is considered at offset and each bin increases binSize. By default, binSize and offset are 1 and 0 so that the bin position matches the resulting position.

Author:

David Garcia

Definition at line 45 of file CircularPeakPicking.hxx.

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Member Typedef Documentation

typedef std::vector<std::pair<double, double> > Simac::CircularPeakPicking::PeakList

Definition at line 48 of file CircularPeakPicking.hxx.

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Constructor & Destructor Documentation

Simac::CircularPeakPicking::CircularPeakPicking	(	unsigned	chromagramSize,
		double	binSize = 1.0,
		double	offset = 0.0
	)			[inline]

Definition at line 55 of file CircularPeakPicking.hxx.

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Member Function Documentation

void Simac::CircularPeakPicking::doIt

(

const std::vector< double > &

chromagram

)

[inline]

Definition at line 106 of file CircularPeakPicking.hxx.

References interpolate().

std::pair<double,double> Simac::CircularPeakPicking::interpolate	(	double	y0,
		double	y1,
		double	y2
	)			[inline]

Find the maximum of an interpolated quadratic polynomial function giving the samples at three equidistant points at x=0, x=1 and x=2.

You can use it for any equidistant samples just by adding x0 to the resulting xmax.

Precondition:

The function will fail when y0>=y1 or y2>=y1, as it is supposed to be applied after having located a peak in y1.

Returns:

A pair containing xmax,ymax

Definition at line 70 of file CircularPeakPicking.hxx.

Referenced by doIt().

const PeakList& Simac::CircularPeakPicking::output

(

)

const [inline]

Definition at line 132 of file CircularPeakPicking.hxx.

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The documentation for this class was generated from the following file:

• CircularPeakPicking.hxx