mirror of
https://github.com/This-weiyuqing/ECG_by_Diffenert_CNN_Test.git
synced 2026-10-18 03:13:39 +08:00
32 lines
819 B
Python
32 lines
819 B
Python
import numpy as np
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import pywt
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import wfdb
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from matplotlib import pyplot as plt
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# file error
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# use db5 ,level9 do deviose
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ECGDATAPATH = './MIT-BIT/'
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# from ECG_read_weiyuqing_without_wfdb import PATH
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# record = wfdb.rdrecord(ECGDATAPATH + number, channel_names=['MLII'])
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record = wfdb.rdrecord(ECGDATAPATH + '100', channel_names=['MLII'])
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data = record.p_signal.flatten()
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coeffs = pywt.wavedec(data=data, wavelet='db5', level=9)
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cA9, cD9, cD8, cD7, cD6, cD5, cD4, cD3, cD2, cD1 = coeffs
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threshold = (np.median(np.abs(cD1)) / 0.6745) * (np.sqrt(2 * np.log(len(cD1))))
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cD1.fill(0)
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cD2.fill(0)
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for i in range(1, len(coeffs) - 2):
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coeffs[i] = pywt.threshold(coeffs[i], threshold)
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rdata = pywt.waverec(coeffs=coeffs, wavelet='db5')
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plt.figure(figsize=(20, 4))
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plt.plot(data)
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plt.show()
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plt.plot(rdata)
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plt.show()
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