Non-contact heart rate measurement method based on a visual camera

A non-contact, measurement method technology, applied in the measurement of pulse rate/heart rate, diagnostic recording/measurement, medical science, etc., to ensure the accuracy of measurement results, ensure stability and reliability, and improve the effect of signal-to-noise ratio

Inactive Publication Date: 2019-01-25
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Non-contact heart rate measurement is important for the development of remote physiological monitoring

Method used

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  • Non-contact heart rate measurement method based on a visual camera
  • Non-contact heart rate measurement method based on a visual camera
  • Non-contact heart rate measurement method based on a visual camera

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[0035] Below in conjunction with accompanying drawing, the present invention is described in further detail.

[0036] Such as figure 1 As shown, the steps of the whole measurement method are as follows:

[0037] Step 1: Determine the ROI;

[0038] Step 1-1: image color enhancement; after acquiring the image, such as figure 2 As shown in this paper, the Euler image upscaling algorithm is used to enhance the color signal. First, use the spatial filter to decompose the image sequence into pyramid multi-resolution, and then send the decomposed image to the time domain filter to obtain the ROI frequency band signal. After that, each frequency band signal is differentially approximated by Taylor series, linear Zoom in, and finally combine the individual images into a new image.

[0039] Step 1-2: Select the ROI; the acquired image may affect the measurement of target areas such as eye blinking and mouth speaking, thereby generating unnecessary noise. In order to avoid unnecess...

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Abstract

The invention relates to a non-contact heart rate measurement method based on a visual camera, comprising the following steps: determining a region of interest ROI, processing pixel signals, and extracting heart rate information. The invention utilizes a camera to collect a video image of an object. Then, for these images, color enhancement is performed on the captured images, and the selected ROIis located. Then the effective signal is extracted and the heart rate is obtained by band-pass filter and Fast Fourier Transform. The experimental results show that this method can measure heart rateeffectively. Therefore, the non-contact heart rate measurement is realized.

Description

technical field [0001] The invention discloses a non-contact heart rate measurement method based on a visual camera, which belongs to the medical field of extracting physiological information based on an ordinary camera. Background technique [0002] At present, the commonly used non-contact heart rate measurement methods include: microwave or millimeter wave-based Doppler measurement, laser Doppler measurement, infrared imaging measurement, and imaging-based photoplethysmography (Imaging PhotoPlethysmoGraphy, IPPG) measurement method. [0003] The Doppler measurement method based on microwave or millimeter wave was first proposed by the United States. This measurement method was first used in the military to find survivors, and then it was used to detect athletes' heart rate information in the 1996 Atlanta Olympic Games. Its main detection principle is to use the form of microwave or millimeter wave to mix the microwave emission waveform with the waveform scattered back fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/024
CPCA61B5/02416A61B5/02438
Inventor 陈建新林清宇周亮魏昕蔡凯
Owner NANJING UNIV OF POSTS & TELECOMM
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