The invention provides a self-
adaptive wavelet noise reduction method and
system based on
mass spectrum
signal processing, and the method comprises the following steps: S1, collecting a
data set outputted by a
mass spectrometer, and inputting the
data set into a
noise reduction process in the form of a
text document; s2, reading related data in the
text document, analyzing spectral peak characteristic parameters, and initializing related parameters; s3, performing multilayer
wavelet decomposition on the document data, and outputting an approximate component and a detail component of each layer; s4, calculating the
noise intensity of different
layers according to the output approximate component and the detail component, and adaptively calculating a
wavelet threshold value based on the
signal length and the
noise intensity; s5, threshold
processing is applied to the detail components, and
wavelet signals are reconstructed; and S6, calculating
signal-to-noise ratios under different
decomposition layer numbers, and selecting the optimal
decomposition layer number to output the
mass spectrum data after
noise reduction. According to the method, the related
spectrogram information output by the mass
spectrometer is denoised, and the signal-to-noise ratio of the
mass spectrum data is improved while the spectrum peak information is reserved to a great extent.