Non-contact real-time heart rate measurement method based on video image

Abstract

The invention discloses a non-contact real-time heart rate measurement method based on a video image. The method comprises the following steps: starting timing and obtaining a frame of RGB image; determining an outer cheek area of the face portion in the RGB image as an area of interest; extracting RGB image data in the area of interest, and converting the data into an L*u*v *color space; extracting a u* channel signal and carrying out space pixel average to obtain an effective source signal average (u*), and storing the effective source signal to an FIFO queue, the preset length of which is l; judging whether the FIFO queue is full; if so, carrying out wavelet denoising on the data in the FIFO queue to obtain re-constructed signals; calculating a time interval mean value n of maximum value points of the re-constructed signals; calculating a current heart rate value, and deleting the front m data in the FIFO queue; judging whether frame interval time reaches a preset value T; and if so, collecting the next frame of image for the same operation, and if not, keeping waiting till meeting the preset conditions, and then, repeating the steps above till finishing measurement. The method realizes noninvasive and real-time detection of heart rate, and has the advantages of low cost and high precision and the like.

Description

technical field [0001] The invention relates to the fields of digital image processing technology and digital signal processing technology, in particular to a non-contact real-time heart rate measurement method based on video images. Background technique [0002] Heart rate refers to the number of times the heart beats per minute, and it is one of the important physiological parameters of the human body. Resting heart rate refers to the heart rate when a person is awake, inactive, and in a quiet state. Resting heart rate reflects a person's state of health and can vary with age, gender, and other physiological conditions. Studies have shown that people with high resting heart rates are more likely to die from heart disease. Real-time monitoring of heart rate can help people understand changes in their physical condition, reduce the occurrence of accidents, and is of great significance to the prevention and control of cardiovascular diseases. [0003] The most traditional ...

AI Technical Summary

Problems solved by technology

With the development of science and technology, people have invented heart rate monitors to measure people's heart rate, but the cost of heart rate monitors is very high, usually only used for clinical monitoring in hospitals, and it is difficult to enter people's daily life

Subsequently, the appearance of the finger-clip heart rate oximeter greatly reduced the cost of equipment on the basis of high measurement accuracy, and it was more convenient to use. As long as the finger-clip heart rate oximeter is clipped on your finger, you can accurately obtain your own However, the use of the finger clip heart rate oximeter must have direct contact with the human body. Long-term contact will cause discomfort to the subjects, so it is not suitable for long-term heart rate measurement

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