Description Usage Arguments Details Value References See Also

Estimate a (single) ridge from a time-frequency representation, using the ICM minimization method.

1 2 |

`modulus` |
Time-Frequency representation (real valued). |

`guess` |
Initial guess for the algorithm. |

`tfspec` |
Estimate for the contribution of the noise to modulus. |

`subrate` |
Subsampling rate for ridge estimation. |

`mu` |
Coefficient of the ridge's second derivative in cost function. |

`lambda` |
Coefficient of the ridge's derivative in cost function. |

`iteration` |
Maximal number of moves. |

To accelerate convergence, it is useful to preprocess modulus before
running annealing method. Such a preprocessing (smoothing and
subsampling of modulus) is implemented in `icm`

. The
parameter subrate specifies the subsampling rate.

Returns the estimated ridge and the cost function.

`ridge` |
1D array (of same length as the signal) containing the ridge. |

`cost` |
1D array containing the cost function. |

See discussions in the text of “Practical Time-Frequency Analysis”.

`corona`

, `coronoid`

, and `snake`

,
`snakoid`

.

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