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Visual attention level recognition method thereof

A technology of visual attention and recognition method, which is applied in the field of visual attention level recognition devices, and can solve problems such as weak regulation

Inactive Publication Date: 2021-05-25
TIANJIN UNIV
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Problems solved by technology

Specifically, in the attention situation, the response amplitude of the corresponding SSVEP evoked by steady-state visual stimuli oscillating at a specific frequency will be enhanced, but studies have found that this moderating effect is very weak, and no research has yet proved that visual attention has an effect on SSVEP signals. The modulation result of is separable

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  • Visual attention level recognition method thereof
  • Visual attention level recognition method thereof
  • Visual attention level recognition method thereof

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Embodiment Construction

[0037] Steady-state visual evoked potential (SSVEP) is the response of the human visual system to external periodic visual stimuli. Studies have shown that the magnitude of responses to corresponding SSVEPs evoked by steady-state visual stimuli oscillating at specific frequencies is enhanced in attentional situations. The present invention combines the experimental paradigm that can induce visual attention fatigue, proposes a new strategy for visual attention level recognition by measuring background SSVEP, and develops a typical pattern matching for identifying SSVEP signals under different visual attention levels (DCPM) algorithm. The experimental results of offline test show that the DCPM algorithm can obtain a higher classification accuracy rate, which proves that the SSVEP features modulated by different visual attention states are separable, and the recognition of the visual attention level can be realized by measuring the background SSVEP. Relevant research ideas and t...

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Abstract

The invention relates to an electroencephalogram technology and a medical instrument, provides a new strategy for carrying out visual attention level identification by measuring background SSVEP, develops a discriminative canonical pattern matching (DCPM) algorithm suitable for identifying SSVEP signals under different visual attention levels, and obtains an ideal classification correct rate. Therefore, according to the technical scheme, the visual attention level recognition method comprises the steps that an experimental normal form which takes steady-state visual stimulation as the background and can induce visual attention fatigue is designed, an electroencephalogram signal collecting device needed by an experiment is built, behavioral data and electroencephalogram signals of an operator are collected by means of the built device, preprocessing and feature extraction are carried out after storage, finally classification is carried out, and the discrimination accuracy is calculated. The method is mainly applied to visual attention level recognition occasions.

Description

technical field [0001] The invention relates to electroencephalogram technology and medical equipment, in particular to a visual attention level recognition device and method. Background technique [0002] Attention refers to the behavior and cognitive process of mental activities focusing on one thing while ignoring other irrelevant things. In people's daily study, work and life, attention plays a vital role. However, it is extremely difficult for most people to maintain a good state of attention for a long time. With the decline of attention level, not only learning and work efficiency will be directly affected, but serious accidents may even be caused. If the decline in attention can be sensed in advance, it is possible to take corresponding measures to prevent mistakes before they come, and control the mistakes caused by the decline in attention levels. However, most of the time individuals are unable to accurately identify their own state of attention, especially whe...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/16A61B5/378A61B5/00
CPCA61B5/168A61B5/16A61B5/7235A61B5/7264A61B5/7267
Inventor 许敏鹏程秀敏魏斯文明东
Owner TIANJIN UNIV
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