def centroids(self, instrument, min_abundance=1e-4, points_per_fwhm=25):
        """
        Estimates centroided peaks for a given instrument model.

        :param instrument: instrument model
        :param min_abundance: minimum abundance for including a peak
        :param points_per_fwhm: grid density used for envelope calculation
        :returns: peaks visible with the instrument used
        :rtype: TheoreticalSpectrum
        """
        assert self.ptr != ffi.NULL
        centroids = ims.spectrum_envelope_centroids(self.ptr, instrument.ptr,
                                                    min_abundance, points_per_fwhm)
        return _new_spectrum(CentroidedSpectrum, centroids)
Estimates centroided peaks for a given instrument model.

        :param instrument: instrument model
        :param min_abundance: minimum abundance for including a peak
        :param points_per_fwhm: grid density used for envelope calculation
        :returns: peaks visible with the instrument used
        :rtype: TheoreticalSpectrum