Electroencephalogram electrode space positioning system and positioning method

Abstract

The invention discloses an electroencephalogram electrode space positioning system, comprising a plurality of auxiliary positioning marks, an image acquisition device and a data processing device; the auxiliary positioning mark contains characteristic marks; and the characteristic marks comprise a plurality of mutually parallel nested rectangles with different sizes and colors, wherein the centers of the rectangles are coincident with the circle center of an identification part. The invention further discloses an electroencephalogram electrode space locating method, comprising the following steps of: firstly, using the nested rectangles with different color combinations at a certain distance from the scalp as the auxiliary positioning marks; calculating the vertex coordinates of the rectangle by utilizing intersection of both sides of the rectangle, and independently finishing the positioning of electroencephalogram electrodes in a mono-angle according to the principle of P4P; and then fixing by using the image acquisition device, wherein the method of tester movement carries out the positioning on the electroencephalogram electrodes in the whole head area. The electroencephalogram electrode space positioning system and the positioning method avoid the interferences of hair and electrode connecting wires and the positioning error caused by head shaking in the case of positioning, and have higher positioning precision, stability, automaticity and repeatability.

Description

technical field [0001] The invention belongs to the technical field of electroencephalogram signal measurement, in particular to an electroencephalogram electrode space positioning system and positioning method based on monocular vision. Background technique [0002] In the process of EEG signal measurement, analysis, and EEG signal source location, the position of EEG electrodes in three-dimensional space is the key data that affects the accuracy of source location. At present, the existing EEG electrode positioning methods mainly include manual measurement, electromagnetic positioning system measurement, ultrasonic positioning system measurement and photogrammetry. Among them, (1) Manual measurement is mainly realized by using various measuring equipment, such as rulers and electronic distance meters. This method is currently used by most hospitals. Since manual measurement can only measure the spatial position of one electrode at a time, Therefore, the positioning accura...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a spatial positioning system and positioning method for EEG electrodes to overcome the difficulties in the prior art in terms of price, automation, repeatability and accuracy and the EEG can only be calculated after all the images are taken. Defects in Electrode Position

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