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Non-contact visual heart rate detection method for eliminating motion noise of video ballistocardiogram signal

A cardiac shock signal, non-contact technology, applied in the field of biomedical signal processing, can solve problems such as interference without considering motion noise

Active Publication Date: 2020-11-27
HEFEI UNIV OF TECH
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Problems solved by technology

Their method does not take into account the interference of motion noise, such as: rigid motion (voluntary head movement) or non-rigid motion (facial expression) interference
Since the slight mechanical motion of the head caused by the periodic activity of the heart is very weak relative to the rigid or non-rigid motion, how to eliminate the interference of motion noise is a challenge to obtain an accurate heart rate from the new shock signal of the video

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  • Non-contact visual heart rate detection method for eliminating motion noise of video ballistocardiogram signal
  • Non-contact visual heart rate detection method for eliminating motion noise of video ballistocardiogram signal
  • Non-contact visual heart rate detection method for eliminating motion noise of video ballistocardiogram signal

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Embodiment Construction

[0033] In this embodiment, a non-contact heart rate detection method for eliminating the motion noise of the video cardiac shock signal is to first obtain the first frame of the video image and determine the region of interest and the feature points of the face, and then use the tracking algorithm to track the feature points , for different facial regions of interest, delete the abnormal feature point trajectories, and then use the two datasets of feature point lateral motion trajectory signal and longitudinal motion trajectory signal as the input of canonical correlation analysis, and then set the canonical correlation variable to 0 according to the specified rules And get the longitudinal motion trajectory signal to remove the rigid motion noise, then perform detrending and band-pass filtering processing, and then use the principal component analysis method to reduce the dimensionality, and select the first five principal components as a data set, the two faces of interest Th...

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Abstract

The invention discloses a non-contact visual heart rate detection method for eliminating motion noise of a video ballistocardiogram signal. The method comprises the following steps that firstly, a face region of interest and feature points in the region are acquired; transverse and longitudinal coordinate motion track signals of the feature points are obtained by adopting a tracking algorithm; twosets are respectively constituted, rigid and non-rigid motion noise is removed through two-step canonical correlation analysis; pulse signals are screened out from typical correlation variables obtained through typical correlation analysis in the second step, the heart rate is extracted from the pulse signals through a power spectrum analysis method, and finally abnormal heart rate values are found out according to heart rate continuity and replaced with correct heart rate values. According to the invention, the interference of rigid and rigid motion noise can be removed, so that the accuracyof non-contact video heart rate detection is improved.

Description

technical field [0001] The invention belongs to the technical field of biomedical signal processing, and in particular relates to a non-contact heart rate detection method for eliminating motion noise of a video cardiac shock signal. Background technique [0002] Heart rate is one of the important physiological parameters of the human body, and its long-term detection is of great significance to the early prevention of cardiovascular diseases, clinical diagnosis, and monitoring of human health. Traditional clinical heart rate detection methods require related equipment such as electrocardiograph electrodes or other sensors to be in contact with the human body, which can easily cause physical discomfort and is not suitable for some special constitutions such as sensitive skin, nor for infants or burn patients. The heart rate detection method can overcome these deficiencies of the traditional contact method. The video-based heart rate detection method is a non-contact heart r...

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Application Information

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IPC IPC(8): G06T5/00G06T7/246G06K9/00G06K9/32G06K9/62A61B5/024
CPCG06T7/246A61B5/024G06T2207/10016G06T2207/30201G06V40/168G06V10/25G06F18/2135G06T5/70
Inventor 宋仁成李吉吉成娟李畅刘羽陈勋
Owner HEFEI UNIV OF TECH
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