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Heart rate measuring method based on low-end imaging device

A technology of imaging equipment and measurement methods, which is applied in the measurement of pulse rate/heart rate, etc., can solve the problems that infrared detection instruments are not commonly used and affect the scope and accuracy of detection, and meet the requirements of easy real-time operation and lower data accuracy. Operation simple and easy effect

Inactive Publication Date: 2013-09-04
中国人民解放军第一五二中心医院 +1
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Problems solved by technology

Initially, infrared light was used and an external light source was used to illuminate the surface of the detected skin. However, infrared detection instruments are not commonly used in daily life, and the external light source often limits the size of the irradiation and detection area, thus affecting the scope and accuracy of detection.

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  • Heart rate measuring method based on low-end imaging device
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  • Heart rate measuring method based on low-end imaging device

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Embodiment Construction

[0013] The first step is to select a suitable lighting environment, determine the position where the low-end imaging equipment can clearly and relatively completely image the face area, and fix the equipment.

[0014] The second step is to start the imaging device to collect video of the scene containing the face area. During the collection process, the face is allowed to move and deflect slightly within the scope of the imaging scene. Save the collected data as a video file.

[0015] The third step is to read the collected video files according to the three channels of RGB, select the face area in each frame, and average the gray value in the selected area.

[0016] The fourth step is to draw the obtained gray mean value into three mean value curves with the number of frames as a variable.

[0017] The fifth step is to use the entropy information to judge the randomness of the three color channel signals, and set the threshold to judge the degree of color distortion of the s...

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Abstract

The invention discloses a heart rate measuring method based on a low-end imaging device. The method is mainly applied to measuring a non-contact heart rate under daily ambient light illumination conditions. The method comprises the following steps that the video including the human face area is read according to RGB channels, the grey average of the human face area in each frame is calculated, and three curves are drawn with the number of frames as variables. A threshold value is set based on the information entropy principle, and the cross-color situation of the imaging device is judged according to the entropy of the three curves. When the cross-color situation is serious, the waveform of a representative pulse wave is extracted by utilizing the independent component analysis method. When the cross-color situation is not serious, a simple division algorithm is carried out on a red channel curve and a green channel curve, the waveform of the representative pulse is obtained, the Fourier transform is carried out on the waveform, and the heart rate is obtained by extracting the frequency corresponding to the maximum frequency value within the range between 0.5Hz and 3Hz.

Description

technical field [0001] The patent of the present invention relates to a heart rate measurement method based on low-end imaging equipment, which is mainly used in non-contact heart rate measurement under daily ambient lighting conditions. Compared with the heart rate measurement method currently used in daily use, this method has strong anti-interference ability, common equipment, simple operation, no contact with the measured person at all, and is more suitable for ordinary people to use for health monitoring in daily life. Background technique [0002] Heart rate is the most basic information of the pulse wave and one of the four vital signs of the human body. Its stability directly reflects the quality of the heart function and is an important physiological indicator of human health. At present, among the heart rate measurement methods, the "gold standard" for clinical heart rate measurement is the electrocardiogram, and the methods used for daily heart rate measurement ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/024
Inventor 赵京生朱慧时赵跃进董立泉刘明刘小华武红袁路彬吴铁军魏运亮
Owner 中国人民解放军第一五二中心医院
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