mirror of
https://github.com/This-weiyuqing/ECG_by_Diffenert_CNN_Test.git
synced 2026-10-17 19:05:30 +08:00
92 lines
2.9 KiB
Python
92 lines
2.9 KiB
Python
import numpy as np
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import pywt
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import wfdb
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import torch
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from ECG_read_weiyuqing_without_wfdb import ECGDATAPATH
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def denoise(date):
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# Wavelet db5 level9
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coeffs = pywt.wavedec(data=date, wavelet='db5', level=9)
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cA9, cD9, cD8, cD7, cD6, cD5, cD4, cD3, cD2, cD1 = coeffs
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# noice del
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threshold = (np.median(np.abs(cD1)) / 0.6745) * (np.sqrt(2 * np.log(len(cD1))))
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# take cD 1,2 turn 0 to denoise
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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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# get signal that before wavelet
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rdata = pywt.waverec(coeffs=coeffs, wavelet='db5')
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return rdata
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# get ECG data,date type and denoise
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# this function without return
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# use append take return data to pass data
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def getDataSet(number, X_data, Y_data):
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ecgClassSet = ['N', 'A', 'V', 'l', 'R']
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print('get' + number + ' ECG data')
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record = wfdb.rdrecord(ECGDATAPATH + number, channel_names=['MLII'])
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data = record.p_signal.flatten()
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# use def denoise
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rdata = denoise(date=data)
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# get type of ECG data
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annotation = wfdb.rdann(ECGDATAPATH + number, 'atr')
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Rlocation = annotation.sample # annotation.sample:get R
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Rclass = annotation.symbol
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# delete stable date near R
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start = 10
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end = 5
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i = start
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j = len(annotation.symbol) - end
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# get NAVLR type data
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while i < j:
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try:
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lable = ecgClassSet.index(Rclass[i])
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x_train = rdata[Rlocation[i] - 99:Rlocation[i] + 201]
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X_data.append(x_train)
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Y_data.append(lable)
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i += 1
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except ValueError:
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i += 1
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return
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# RATIO=The ratio of the training set to the test set，usually is 0.3
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def loadData(RATIO):
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numberSet = [
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'100', '101', '103', '105', '106', '107', '108', '109', '111', '112', '113', '114', '115', '116', '117', '119',
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'121', '122', '123', '124', '200', '201', '202', '203', '205', '208', '210', '212', '213', '214', '215', '217',
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'219', '220', '221', '222', '223', '228', '230', '231', '232', '233', '234'
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]
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dataSet = []
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labelSet = []
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for n in numberSet:
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getDataSet(n, dataSet, labelSet)
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dataSet = np.array(dataSet).reshape(-1, 300)
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labelSet = np.array(labelSet).reshape(-1, 1)
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train_ds = np.hstack((dataSet, labelSet))
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np.random.shuffle(train_ds)
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X = train_ds[:, :300].reshape(-1, 300, 1)
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Y = train_ds[:, 300]
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# cut test and train data from ECG data
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shuffle_index = np.random.permutation(len(X))
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test_length = int(RATIO * len(shuffle_index))
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test_index = shuffle_index[:test_length]
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train_index = shuffle_index[test_index:]
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X_test, Y_test = X[test_index:], Y[test_index]
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X_train, Y_train = X[train_index], Y[train_index]
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return X_train, Y_test, X_test, Y_train
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class CNN_model_level_one(torch.nn.Module):
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def __init__(self):
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super().__init__()
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self.conv1 = torch.nn.Conv1d(in_channels=1,out_channels=1,) |