CN103345600A - Electrocardiosignal data processing method - Google Patents
Electrocardiosignal data processing method Download PDFInfo
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Abstract
The invention discloses an electrocardiosignal data processing method. The electrocardiosignal data processing method comprises the following steps of (1) collecting data of electrocardiosignals; (2) carrying out preprocessing on the collected data of the electrocardiosignals, wherein baseline drift removal processing and de-noising processing are carried out on the collected electrocardiosignals; (3) decomposing the electrocardiosignals into single-cycle electrocardiosignal sets; (4) carrying out characteristic extraction, carrying out signal classification according to single-cycle electrocardiosignals after normalization and the level of similarity of curve signals, and choosing electrocardiosignals in the maximum class as a template; (5) detecting signal input, carrying out similarity comparison between the electrocardiosignals and a central database template to determine the identity. According to the single-leading electrocardiosignal data processing method, the mode of characteristic curve matching is adopted to carry out curve similarity comparative studies on electrocardiosignal sequences, and complex procedures for extracting characteristic points are avoided.
Description
[technical field]
The present invention relates to a kind of technology of identification, relate in particular to a kind of electrocardiosignal that utilizes and carry out the data processing, and then the method for identification identity.
[background technology]
Along with computer network and development of electronic technology, a kind of new auth method occurred and replaced traditional password and password---biological identity recognizing technology.Biological identity recognizing technology refers to utilize human body biological characteristics or behavioural characteristic to carry out a kind of technology of authentication.
Automatic recognition system based on biological characteristic has identical substantially principle of work and the course of work.At first be to gather sample, these samples can be the images of fingerprint, people's face etc.; Next is to carry out feature extraction, and the uniqueness that has according to sample and unique feature are that it distributes a feature code with a kind of algorithm, and this feature code is deposited in database.At last when needs carry out identity authentication to someone, will deposit this person's the feature code of database in certain characteristic matching algorithm again and identified person's feature is complementary, thereby find out its identity.
Electrocardiosignal of the prior art carries out the method for identification, electrocardiosignal satisfies the pacing items of bio-identification, it is relative constant that normal person's Electrocardiographic PQRST waveform kept in the regular hour, even pressure, exercise heart rate change, but it is stable that the QRS waveform still keeps, and so just guaranteed the stability of individual ecg characteristics.But existing each a plurality of unique point of leading that adopts 12 electrocardiosignals that lead based on the electrocardiosignal identity recognizing technology, as having uniqueness and distinctive identification characteristic information, the electrocardiosignal that the Technology Need collection 12 of this identification is led, signals collecting is more loaded down with trivial details, only be applicable to through the professional training hospital doctor and implement, be difficult to be applied in family and the individual medical monitoring.Simultaneously, because the characteristic information of gathering is discrete data, calculation of complex and differentiation accuracy are not high.
[summary of the invention]
For solving the problems of the technologies described above, the present invention proposes a kind of ecg signal data disposal route, and this electrocardiosignal sequence is carried out itself the similarity comparison of characteristic curve:
A kind of ecg signal data disposal route, this method may further comprise the steps:
(a) gather ecg signal data;
(b) ecg signal data that collects is carried out pre-service;
(c) feature extraction will be decomposed into monocycle electrocardiosignal group through pretreated electrocardiosignal, and general's monocycle electrocardiosignal wherein is as a proper vector;
(d) electrocardiosignal is carried out categorizing selection, make up the identification proper vector with this;
(e) similarity is relatively confirmed identity.
In above-mentioned characteristic extraction step, described concrete steps are:
Detect electrocardiosignal QRS complex, determine R wave-wave peak dot;
Be the separatrix with the crest, electrocardiosignal is decomposed into the monocycle signal group;
With each monocycle signal as a proper vector.
Preferably, taking each proper vector is the normalized of [0,1] at transverse axis (time shaft) and the enterprising line range of the longitudinal axis (voltage axis) simultaneously.
Preferably, above-mentioned steps also is included in carries out the cubic spline interpolation algorithm on the transverse axis, and interpolation is spaced apart X=[0:0.01:1].
Preferably, in characteristic extraction step, further comprise and to classify through the monocycle electrocardiosignal after the normalized, and select monocycle electrocardiosignal in the maximum classification as set of eigenvectors.
Preferably, described similarity may further comprise the steps relatively before:
The monocycle electrocardiosignal that extracts in the maximum classification is stored in central database as the original electrocardiographicdigital signal as the set of eigenvectors of sample objects, stores template base into;
Choose in the monocycle electrocardiosignal classification, the highest k the normalization cardiac electrical cycle of similarity stores template base into as individual's representation signal.
After the detection signal input, carry out similarity relatively with the centre data library template, determine one's identity.
Preferably, adopt the characteristic curve matching way, the similarity of monocycle electrocardiosignal sequence being carried out itself curve compares.
Advantage of the present invention is:
1, can utilize family portable equipment to carry out ecg signal acquiring, enlarge user scope, can only be finished by medical institutions such as hospitals and no longer be confined to existing ecg signal acquiring;
2, the present invention adopts the mode of characteristic curve coupling, and the complicated processes of having avoided ecg signal data to extract makes to calculate and oversimplifies;
3, it is not high to have got rid of the signal data accuracy that causes because of factors such as motion, mood, heart diseases, can effectively improve the accuracy of identification.
[description of drawings]
Fig. 1 is an embodiment center electric signal data sampling system architecture synoptic diagram;
Fig. 2 is the process flow diagram of an embodiment center electric signal data sampling;
Fig. 3 is original ecg signal data figure among the embodiment;
Fig. 4 is normalization electrocardio monocycle signal data plot among the embodiment;
Fig. 5 is the monocycle ecg signal data figure after normalization is integrated among the embodiment.
[embodiment]
Below in conjunction with Figure of description 1-5, the technical scheme that the present invention relates to done further elaborating.
Fig. 1 and Fig. 2 show present embodiment center electric signal data sampling system architecture synoptic diagram and process flow diagram respectively, specifically may further comprise the steps:
Step S10 gathers electrocardiosignal.In the present embodiment, adopt the electrocardiosignal that singly leads to carry out identification, lead or portable cardiac collecting device that other differences are led several comprising medical 12.
Because existing each a plurality of unique point of leading that adopts medical 12 electrocardiosignals that lead based on the electrocardiosignal identity recognizing technology, signals collecting is more loaded down with trivial details, and range of application is less, so only need with one of them electrocardiogram (ECG) data that leads in the present embodiment, can gather the data of different objects, different time sections, make the electrocardiosignal identification no longer be confined to medical institutions such as hospital, can utilize family portable electrocardiogram acquisition equipment, tele-medicine and individual medical treatment, gather and upload data voluntarily by the user, enlarged range of application.
Step S20 carries out pre-service to the electrocardiogram (ECG) data of gathering.
The electrocardiosignal pre-service mainly is to carry out filtering, in the present embodiment, can adopt the fertile husband's bandpass filter of Bart of 0.5-45Hz to carry out denoising, and adopt Wavelet Transformation Algorithm to remove baseline wander.
Step S30, the normalized of ecg signal data.
Be illustrated in figure 3 as original ecg signal data figure in the present embodiment, described the original electrocardiographicdigital signal data that collects carried out normalized, concrete steps are:
Determine the monocycle electrocardiosignal and with this as a proper vector.In the present embodiment, Figure 4 shows that normalization electrocardio monocycle signal data plot in the present embodiment, wherein, determine that the step of monocycle signal in the electrocardiosignal is:
Detecting the QRS ripple in the electrocardiosignal, and the position of definite R wave-wave peak dot, is the separatrix with R wave-wave peak dot, and electrocardiosignal is decomposed into monocycle electrocardiosignal group, with each monocycle electrocardiosignal as a proper vector.
Be [0 at transverse axis (time shaft) and the enterprising line range of the longitudinal axis (voltage axis) simultaneously to each proper vector, 1] normalized, and carrying out cubic spline interpolation at transverse axis handles, interpolation is set at X=[0:0.01:1 at interval], like this, make and adopt unified sample frequency in the same information handling system.
Be illustrated in figure 5 as the electrocardio exemplary plot after normalization is integrated, be the separatrix with the R ripple, electrocardiosignal has kept all features of complete cycle signal after normalization, and amplitude difference disappears, electrocardiosignal after the reorganization still can well extract the information of P ripple or R ripple.
Step S40 sets up electrocardiosignal masterplate database.
In the present embodiment, as shown in Figure 3, the top data are training set data, and the bottom is divided into the test set data, and the data that two parts are collected are as the original electrocardiographicdigital signal data, and the top data store in the ecg signal data template base.
As shown in Figure 4, the bottom is divided into normalization monocycle electrocardio recall signal.For the original electrocardiographicdigital signal data that retrieves, by the monocycle confidence electric signal that obtains after the normalized, carry out the signal classification according to the similarity degree between the curve signal, adopt processings of classifying of the method for cluster analysis, choose in the classification of maximum electrocardiosignal as individual's identification electrocardiosignal masterplate.By different objects being carried out the ecg signal data sampling, set up the electrocardiosignal template database.
Among the step S40, also can adopt intermediate value with all electrocardiosignals in the maximum classification as standard vector, calculate and standard vector between difference degree (for example Euclidean distance), and the nearest 10 groups of vectors of selected distance standard vector are as the representative electrocardiosignal template of sample objects.
Step S50, similarity relatively.
Whether the proper vector of the electrocardiosignal that relatively collects is similar to the template in the electrocardiosignal template database, if then enter step S60; If not, then finish.
In the present embodiment, after the input of detection electrocardiosignal, take the characteristic curve matching way, carry out similarity relatively with the centre data library template.
Step S60: described similarity compares, with the sample objects corresponding with the template base data of retrieve data similarity degree maximum, as the owner of retrieval electrocardiogram (ECG) data.
Need to prove that above-described the specific embodiment of the present invention does not constitute the restriction to protection domain of the present invention.Other various corresponding changes and distortion that any technical conceive according to the present invention has been done all should be included within the protection domain of claim of the present invention.
Claims (7)
1. an ecg signal data disposal route is characterized in that, may further comprise the steps:
(a) gather ecg signal data;
(b) ecg signal data that collects is carried out pre-service;
(c) feature extraction will be decomposed into monocycle electrocardiosignal group through pretreated electrocardiosignal, and general's monocycle electrocardiosignal wherein is as a proper vector;
(d) electrocardiosignal is carried out categorizing selection, make up the identification proper vector with this;
(e) similarity is relatively confirmed identity.
2. ecg signal data disposal route as claimed in claim 1 is characterized in that, described characteristic extraction step is specially:
Detect electrocardiosignal QRS complex, determine R wave-wave peak dot;
Be the separatrix with the crest, electrocardiosignal is decomposed into the monocycle signal group;
With each monocycle signal as a proper vector.
3. ecg signal data disposal route as claimed in claim 2 is characterized in that, also comprises step:
Upward each proper vector is carried out the normalized that scope is [0,1] at transverse axis (time shaft) and the longitudinal axis (voltage axis) simultaneously.
4. ecg signal data disposal route as claimed in claim 3 is characterized in that, also is included in to carry out the cubic spline interpolation processing on the transverse axis, and interpolation is spaced apart X=[0:0.01:1].
5. as claim 2 or 3 described ecg signal data disposal routes, it is characterized in that, described characteristic extraction step further comprises classifies the monocycle electrocardiosignal after normalized, and selects monocycle electrocardiosignal in the maximum classification as set of eigenvectors.
6. ecg signal data disposal route as claimed in claim 1 is characterized in that, described similarity may further comprise the steps relatively before:
The monocycle electrocardiosignal that extracts in the maximum classification is stored in central database as the original electrocardiographicdigital signal as the set of eigenvectors of sample objects, stores template base into;
Choose in the monocycle electrocardiosignal classification, the highest k the normalization cardiac electrical cycle of similarity stores template base into as individual's representation signal;
After the detection signal input, carry out similarity relatively with the centre data library template.
7. ecg signal data disposal route as claimed in claim 6 is characterized in that,
Adopt the characteristic curve matching way, the similarity of monocycle electrocardiosignal sequence being carried out itself curve compares.
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