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Non-contact heart rate detection method based on near-infrared video

A non-contact, detection method technology, applied in the field of medical information detection, can solve the problem of unsuitable color camera

Inactive Publication Date: 2019-09-17
HEFEI UNIV OF TECH
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  • Application Information

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Problems solved by technology

But so far, in the vast majority of studies using video to detect heart rate, color video is used, but color cameras are not suitable for night environments or dim ambient light

Method used

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  • Non-contact heart rate detection method based on near-infrared video
  • Non-contact heart rate detection method based on near-infrared video
  • Non-contact heart rate detection method based on near-infrared video

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Embodiment Construction

[0031] In this embodiment, a non-contact heart rate detection method for near-infrared video, such as figure 1 As shown, first obtain the image sequence of the near-infrared video containing the area of ​​interest of the face, and calculate the pixel average of all pixels in the area of ​​interest of the face of each frame of the image, to obtain the single-channel pixel average time series; The single-channel pixel average time series is time-delayed to obtain the dynamic embedding matrix; then the dynamic embedding matrix is ​​subjected to independent component analysis using the blind source separation method to obtain multiple independent components; finally, the power spectrum analysis of these independent components is performed to determine the heart rate information Independent components and get heart rate detection value. Specifically, using a piece of near-infrared video data with a duration of 30s to illustrate, follow the steps below:

[0032] Step 1: Use a near-inf...

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Abstract

The invention discloses a non-contact heart rate detection method based on a near-infrared video. The method includes the steps that firstly, an image sequence including face areas of interest in the near-infrared video is obtained, and the pixel mean value of all pixel points in the face areas of interest in each frame of image is calculated, so that a single-channel pixel mean time sequence is obtained; secondly, time delay is conducted on the preprocessed single-channel pixel mean time sequence to obtain a dynamic embedding matrix; thirdly, the dynamic embedding matrix is subjected to independent component analysis by adopting a blind source separation method to obtain a plurality of independent components; finally, power spectrum analysis is performed on the independent components, the independent components containing heart rate information are determined, and a heart rate detection value is obtained. The invention provides a new method for detecting the near-infrared video heart rate of independent component analysis based on time delay. A solution is provided for practical application of physiological parameter detection based on the video.

Description

Technical field [0001] The present invention mainly relates to the technical field of medical information detection, and particularly relates to a non-contact heart rate detection method based on near-infrared video. Background technique [0002] As an important vital sign of the human body, heart rate refers to the number of heart beats per unit time, generally the number of heart beats per minute. It is an important indicator for evaluating cardiovascular function, and is used for the diagnosis, treatment and monitoring of chronic diseases. It is of great significance. [0003] At present, there are various methods for measuring heart rate. According to whether it needs to be in contact with the human body during heart rate detection, it can be divided into contact and non-contact. The typical contact detection methods are the traditional pulse method and modern methods that use sensors and electrodes in contact with the human body to measure heart rate. Contact heart rate meas...

Claims

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Application Information

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IPC IPC(8): A61B5/024A61B5/00
CPCA61B5/02007A61B5/02416A61B5/725A61B5/748
Inventor 成娟王平陈勋宋仁成刘羽李畅
Owner HEFEI UNIV OF TECH
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