Int J Neural Syst - Epileptic EEG classification based on kernel sparse representation.

Tópicos

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Resumo

The automatic identification of epileptic EEG signals is significant in both relieving heavy workload of visual inspection of EEG recordings and treatment of epilepsy. This paper presents a novel method based on the theory of sparse representation to identify epileptic EEGs. At first, the raw EEG epochs are preprocessed via Gaussian low pass filtering and differential operation. Then, in the scheme of sparse representation based classification (SRC), a test EEG sample is sparsely represented on the training set by solving l1-minimization problem, and the represented residuals associated with ictal and interictal training samples are computed. The test EEG sample is categorized as the class that yields the minimum represented residual. So unlike the conventional EEG classification methods, the choice and calculation of EEG features are avoided in the proposed framework. Moreover, the kernel trick is employed to generate a kernel version of the SRC method for improving the separability between ictal and interictal classes. The satisfactory recognition accuracy of 98.63% for ictal and interictal EEG classification and for ictal and normal EEG classification has been achieved by the kernel SRC. In addition, the fast speed makes the kernel SRC suit for the real-time seizure monitoring application in the near future.

Resumo Limpo

automat identif epilept eeg signal signific reliev heavi workload visual inspect eeg record treatment epilepsi paper present novel method base theori spars represent identifi epilept eeg first raw eeg epoch preprocess via gaussian low pass filter differenti oper scheme spars represent base classif src test eeg sampl spars repres train set solv lminim problem repres residu associ ictal interict train sampl comput test eeg sampl categor class yield minimum repres residu unlik convent eeg classif method choic calcul eeg featur avoid propos framework moreov kernel trick employ generat kernel version src method improv separ ictal interict class satisfactori recognit accuraci ictal interict eeg classif ictal normal eeg classif achiev kernel src addit fast speed make kernel src suit realtim seizur monitor applic near futur

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