Respiration measurement method based on camera and spherical marker

Abstract

The invention provides a respiration measurement method based on a camera and a spherical marker. The spherical marker attaches to the chest and abdomen of the human body, the images of the marker are collected by adopting the camera, the distance change between the marker and the camera can cause the change of the imaging size of the marker in the camera, by extracting the contour radius of the imaging region of the marker and recording the size change of the contour radius of the region in the continuous images, the respiration movement of the human body can be reflected, the respiration movement mode of the human body can be tracked, and the respiration frequency can be calculated. According to the respiration measurement method provided by the invention, the tracking on the respiration mode and the calculation for the respiration frequency are realized through the simple spherical marker and the camera, so that the connection of the expensive sensor and the discomfort caused to the human body are avoided, in addition, the complex tracking and calculating algorithm in other image measurement respiration algorithms are also avoided, and the respiration measurement method is beneficial for the measurement for the respiratory frequency and the tracking for the respiration mode in daily life.

Description

technical field [0001] The invention relates to the technical field of physiological signal monitoring and analysis, relates to pattern detection and respiration rate measurement of human respiration signals, and in particular to a method for tracking respiration patterns and respiration rate measurement using a spherical marker and a camera. Background technique [0002] For the monitoring and measurement of respiratory signals, the corresponding impedance sensors and temperature sensors are directly connected to the human body to measure the air temperature, flow rate and body movement of human breathing, which often requires complicated connection and use, and will bring certain harm to the human body. Discomfort. In response to these problems, a respiration measurement method based on a color camera was produced, in which Stefan Wiesner measured respiration by measuring the color saturation changes of multiple block markers attached to the abdomen of the human body in th...

AI Technical Summary

Problems solved by technology

[0002] For the monitoring and measurement of respiratory signals, the corresponding impedance sensors and temperature sensors are directly connected to the human body to measure the air temperature, flow rate and body movement of human breathing, which often requires complicated connection and use, and will bring certain harm to the human body. Discomfort

In response to these problems, a respiration measurement method based on a color camera was produced, in which Stefan Wiesner measured respiration by measuring the color saturation changes of multiple block markers attached to the abdomen of the human body in the color image, but this method is only applicable in the supine position, and requires multiple markers to assist in the measurement

Zhang and Shao used different methods to calculate the subtle motion changes of the human body in the color image to measure respiration. However, these two methods require complex calculations and area tracking algorithms and expensive CCD cameras. In addition, they are very sensitive to the subtle motion of the human body and are easy to detect. produce large error

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