Rhonchus identification method based on frequency domain image processing
A recognition method and technology of dry rales, applied in speech analysis, instruments, etc., can solve problems such as being easily affected by the external environment
Inactive Publication Date: 2016-04-13
HANGZHOU BESTPLUS INFORMATION TECH CO LTD
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AI-Extracted Technical Summary
Problems solved by technology
The invention relates to a rhonchus identification method based on frequency domain image processing. The method is characterized in that audio signals are converted from time domain into frequency domain through fast Fourier transform, the produced frequency domain images is subjected to binarization processing by the aid of a preset threshold, and specific rhonchus signals are obtained through filtering. The rhonchus identification method has the advantages that rhonchus can be identified fast, the method is high in efficiency, low in calculation amount, low in system load and simple in maintenance, and the blank that currently breath sounds cannot be automatically identified is filled up; by the efficient calculation ability of a computer, the tiny audio frequency which cannot be heard by human ears can be detected, and controversial rhonchus types can be categorized according to specific numerical values.
Fft fast fourier transformFrequency domain +9
- Experimental program(1)
Description & Claims & Application Information
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