Construction method and detection method of short-time rPPG signal detection model

Abstract

The invention discloses a construction method for a short-time remote photoplethysmography signal detection model. The method comprises the following steps: acquiring a face video image sequence, and preprocessing the face video image sequence as an initial data set; processing the collected photoplethysmography signals to serve as a target set; and training a short-time remote photoplethysmography signal detection model. An encoder, a decoder, a branch loss module and a residual constant block in feature extraction constructed based on a 3D space-time convolution filter and a deconvolution filter, and a significant feature extraction module based on a CBAM attention mechanism are designed. The design of the encoder and the decoder is used for carrying out scale transformation under time-space domain features and time domain features, it is guaranteed that effective features highly related to short-time remote photoplethysmography signal time sequence information are reserved in the feature extraction process, and the performance of the model is improved. On the basis of a CBAM attention mechanism-based significant feature extraction module, the perceptual feature extraction capability is improved, and the problem of low robustness in the prior art is solved.

Description

technical field [0001] The invention belongs to the field of visual physiological parameter monitoring and signal processing, relates to a robust short-term signal detection and heart rate estimation method, in particular to a short-term rPPG signal detection model construction method and detection method. Background technique [0002] Heart rate is a vital physiological parameter for assessing people's health status. The heart rate monitoring method in medical care is based on contact devices, including ECG sensors attached to the skin of the body and PPG optical devices in the form of nails, where PPG is a A method based on changes in the amount of light absorbed by blood caused by changes in blood flow in the blood circulation, and this change affects the transmission and reflection of the light source by the skin and ultimately leads to changes in skin color. Cameras can be used to sense changes in light reflected or absorbed by skin that cannot be detected by the naked ...

AI Technical Summary

Problems solved by technology

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a short-term rPPG signal detection model construction method and detection method to solve the problem that the efficiency and robustness of the remote heart rate evaluation framework in the prior art are not high and the remote heart rate The technical problem of long time dependence and low efficiency in estimation

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