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An Adaptive Decomposition Method Based on Image Segmentation Technology to Generate Filters

An image segmentation and filter technology, applied in the field of signal processing, can solve the problems of limiting the application scope of the adaptive decomposition algorithm and inability to separate, and achieve the effect of improving the frequency resolution and broadening the application scope.

Inactive Publication Date: 2019-04-23
TSINGHUA UNIV
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Problems solved by technology

For the classic adaptive decomposition algorithm EMD method, it has been reported in the literature, but when the frequency ratio of the two components is greater than 0.75 (f 低 / f 高 ), this method cannot separate the two, thus limiting the application range of the adaptive decomposition algorithm

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  • An Adaptive Decomposition Method Based on Image Segmentation Technology to Generate Filters
  • An Adaptive Decomposition Method Based on Image Segmentation Technology to Generate Filters
  • An Adaptive Decomposition Method Based on Image Segmentation Technology to Generate Filters

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Embodiment Construction

[0030] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0031] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element refe...

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Abstract

The invention provides an adaptive decomposition method generating filters based on the image segmentation technology. The method comprises the steps of firstly performing time-frequency transformation on to-be-analyzed signals to obtain corresponding time-frequency coefficients and time-frequency planes; secondly, performing threshold segmentation on the time-frequency planes to obtain binaryzation images; thirdly, marking connected domains in the binaryzation images; fourthly, generating a group of time-frequency filters according to the connected domains, performing filtering on time-frequency systems based on the time-frequency filters and outputting filtering results; fifthly, performing time-frequency inverse transformation on the filtering results to obtain decomposition results. When the sampling time of each frequency component of a to-be-decomposed signal is long enough, the method can have any frequency resolution; compared with the frequently-used empirical mode decomposition algorithm, the method increases the frequency resolution greatly, can perform adaptive decomposition on the signals with dense distribution of frequencies, and thus can calculate the instantaneous frequency and the instantaneous amplitude of each component, so that the application range of the adaptive decomposition algorithm is widened.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to an adaptive decomposition method for generating filters based on image segmentation technology. Background technique [0002] At present, adaptive decomposition algorithms are widely used in the field of signal processing. The published papers of its typical representative, Empirical Mode Decomposition (EMD), have so far received more than 12,000 citations in Google Scholar, which is evident. The reason is mainly because the combination of EMD method and Hilbert transform provides a convenient way to calculate the instantaneous frequency and instantaneous amplitude of each frequency component of the signal. As commonly used parameters for quantitatively evaluating signal characteristics, instantaneous frequency and instantaneous amplitude are widely used. Instantaneous frequency is widely used in engineering fields such as radar, sonar, and fault diagnosis of mechanic...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T3/40
CPCG06T2207/20024G06T2207/20056G06T2207/20064
Inventor 阎绍泽刘涛果晓东
Owner TSINGHUA UNIV
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