Method for accurately extracting pulse wave based on human body superficial artery video

Abstract

The invention discloses a method for accurately extracting a pulse wave based on a human body superficial artery video, which is used for solving the problems of movement and illumination interference generally existing in a non-contact pulse wave measurement method and carrying out multiple filtering on various noises to realize accurate extraction of the pulse wave. The method comprises the following steps: S1, acquiring a human body superficial artery video; s2, preprocessing the video through adaptive gamma transformation; s3, motion amplification is carried out on the video through an amplification algorithm combining Euler amplification and FRR filtering; s4, an adaptive threshold inter-frame difference method is adopted, and a multi-feature region is selected as a region of interest; s5, extracting an original pulse wave signal; s6, carrying out the wavelet transformation of the II-type Chebyshev method and the adaptive threshold method, and filtering the noise in the signal through an adaptive notch filter; and S7, enhancing the pulse wave signal by a modulation domain spectral subtraction method. According to the method, the influence of motion artifacts and ambient brightness differences can be effectively inhibited, meanwhile, the region of interest is accurately selected to filter noise, and the accuracy of pulse wave extraction is further improved.

Description

technical field [0001] The invention relates to a method for accurately extracting pulse waves based on the video of human superficial arteries, which can be used for non-contact measurement of pulse waves in multiple superficial arteries of the human body. , blood oxygen saturation and other vital signs indicators, belonging to the field of medical equipment and computer vision technology. Background technique [0002] The process of completing a rhythmic contraction and relaxation of the heart is a cardiac cycle, and the process of completing one cardiac cycle is equivalent to the completion of one pumping function of the heart. In the process of realizing the blood pumping function, the blood circulation system of the whole body plays a crucial role. When the heart contracts, the blood of the human body is ejected from the ventricle into the arterial vascular system, passes through the capillary network, and reaches the venous system; when the heart is diastolic, the blo...

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Problems solved by technology

However, the effect of endpoint noise is not addressed, and the effect of light interference is not considered

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