Non-contact radial artery waveform extraction method

Abstract

The invention discloses a non-contact radial artery waveform extraction method and mainly solves problems of robustness and accuracy in non-contact wrist radial artery pulse wave extraction in real scenes. An implementation process includes: (1) controlling a camera facing the human wrist to acquire a 30s video through a computer; (2) subjecting the acquired video to Laplacian pyramid to realize space decomposition, and subjecting sub-bands in pyramid decomposition to IIR filtering to complete time domain filtering, wherein amplification of radial artery pulse signals in the video is realizedin the process; (3) subjecting the amplified video to blocking processing, analyzing power spectra of all blocks, and selecting an area with highest signal-to-noise ratio as an interested area; (4) selecting the interested area as an input signal, dividing the area into three signal sources, and performing independent component analysis to finally obtain radial artery waveforms. By radial artery pulse characteristics, the wrist radial artery pulse signals are amplified and extracted through video motion, then accurate selection of the interested area is performed, and environmental noise interferences are reduced; by independent component analysis, pulse waveform accuracy is further improved.

Description

technical field [0001] The invention belongs to the field of computer vision, in particular to a non-contact radial artery waveform extraction method. Background technique [0002] In recent years, with the in-depth exploration of computer vision technology, more and more theoretical knowledge of computer vision has been applied to the medical field, which has promoted the development of medicine to a certain extent. Computer vision uses tools such as computers and cameras as a medium to model and study specific problems in the medical field through related technologies, and explore solutions to problems from the perspective of computer vision, providing a unique way for the development of medicine. [0003] The pulse wave is the trajectory of the arterial fluctuations accompanied by the periodic contraction of the heart, which integrates various information carried by the heart pumping activity and the pressure wave along the arterial tree. It is one of the frontier topics...

AI Technical Summary

Problems solved by technology

However, the contact pulse wave extraction method needs to be operated under the guidance of certain professionals, and the use process is relatively cumbersome.

Among them, the pulse wave acquisition method based on the pressure sensor requires close contact with the skin surface of the measured person, which is extremely inconvenient for patients with some skin diseases

For photoplethysmography, an auxiliary light pipe is required to illuminate the human body and clamp the transmitter and receiver to the fingertips of the human body, which will cause discomfort to the subject to a certain extent

Therefore, none of these methods can well solve the problem of radial artery waveform extraction in real-world scenarios.

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