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Method for measuring human body heart rate on basis of mobile phone image

A measurement method and technology of heart rate, applied in the direction of measuring pulse rate/heart rate, etc., can solve the problems of unstable measurement results, inaccurate counting, etc., to improve the accuracy and measurement stability, high-precision measurement, low-cost measurement. Effect

Inactive Publication Date: 2014-07-23
XIDIAN UNIV
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Problems solved by technology

[0010] Although the standard deviation of the PPG signal is used to determine the threshold to improve the peak determination method, but the difference between two adjacent points is used to determine the peak value, resulting in inaccurate counting and unstable measurement results

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  • Method for measuring human body heart rate on basis of mobile phone image
  • Method for measuring human body heart rate on basis of mobile phone image
  • Method for measuring human body heart rate on basis of mobile phone image

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Embodiment Construction

[0023] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0024] For the flow of the measurement method of human heart rate based on mobile phone images, please refer to figure 1 , the specific example is as follows:

[0025] A. Obtain PPG signal

[0026] On the mobile phone, first intercept the edge of the finger image to obtain a small image, use the FFT-based segmentation method to denoise the small image, calculate the PPG signal according to the power density of the small image, and use the peak counting method to demodulate the human heart rate from the PPG signal , to achieve high-precision measurement of heart rate physiological parameters.

[0027] For each collected picture, extract the 50*50 pixel area in the center of the image to form a small image of each image, and perform FFT processing on each small image. The spectral energy of the fin...

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Abstract

The invention discloses a method for measuring a human body heart rate on basis of a mobile phone image. The method is characterized in that the method comprises the following steps of obtaining PPG signals, obtaining a finger image through a mobile phone, processing the finger image through an FFT algorithm, then carrying out filtering, and calculating power density to determine the PPG signals by utilizing the filtered PPG frequency spectrum information and combining weights of three kinds of pixel protection information; measuring the human body heart rate, detecting peak waves by analyzing the PPG signals, reducing noise signals in the PPG signals, demodulating the human body heart rate from the PPG signals, and achieving high-precision measurement on heart rate physiological parameters. The method mainly improves measured effects, and improves the precision of the existing mobile phone heart rate measuring technology and the stability of measurement, and people can effectively monitor key physical indexes representing states of chronic diseases and know own physical conditions in time and with low cost.

Description

1. Technical field [0001] The invention relates to the field of measuring human heart rate, in particular to a method for measuring human heart rate based on mobile phone images. Background technique [0002] Since arterial activity can cause slight changes in the skin color of specific parts of the human body, optical equipment can be used to collect information on skin color changes caused by arterial activity, and measure human body parameters based on the collected images. In the past two years, there have been some research results in the measurement of human physiological characteristics by using bio-optical information, most of which are based on professional measurement equipment. Although this method can obtain better accuracy, the disadvantage is that the equipment is expensive and Portability is poor, which is not conducive to the popularization and promotion of monitoring. In terms of the measurement of human physiological parameters using mobile terminal camera...

Claims

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Application Information

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IPC IPC(8): A61B5/024
Inventor 孙聪杨增印黄德俊叶春晓马建峰
Owner XIDIAN UNIV
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